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What is PEMPro? New features in PEMPro V2 and V2.5

1. ip Ber a ee ee te i ee ge 1 ee ee Backlast Censer SETiIngs Movement Status MlaOnmer imac Duration secs Enable Lo Extra Delay Between Image Duration Secs Moves msec f Position ea 20 z O a Lower Right Dec Movement Method hern nee Scope Connected Camera Connected The controls are very simple N S Move Duration Secs Controls the duration of each discrete North and South move The moves will occur at the mount s current guide rate NOTE Most mounts do not do well with a very short duration so if you see an irregular sawtooth pattern you might want to try increasing the duration 5 seconds Is typically a good minimum duration Image Duration Secs Controls the duration of the entire image Dec Movement Method Sets the movement method ASCOM Dec RELAY X or RELAY Y Of the two relays RELAY Y usually moves the declination axis Extra Delay Between Moves msec This inserts an extra delay after the completion of a move This may be needed with some telescopes because they might ignore the new move command because the old move has not completed You should experiment with this setting if the star pattern does not look like a sawtooth Before the Start button is enabled you must connect to the scope and camera on the Setup tab of the PEC page You can enable the Magnifier by clicking the Enab
2. PEMPro Create PE Curve el ES File Graph Type zl Fitting PbS Error it Frequency Spectrum Linear Graph of PE Frequency Spectrum Periodic Eror f 41 971 5 e T FFT Wawetom Analysis Fundamental Freg cycles worm period Amplitude arc seconds Phase degrees 1 000 3 000 3 333 Data Points Aad Asis s Num Time Cycle Phase Centroid Fitale Enor gt l 0 00 00 000 00 00 000 0 00 05 000 00 08 000 0 00 10 343 00 10 343 0 00 12 687 00 12 667 0 00 15 000 00 15 000 0 00 1 7 343 00 1 7 343 0 00 19 625 00 19 625 0 00 21 968 00 21 965 Oo d 07 On Fe to Pa Initial Worm Phase Image Rall degrees 037 34 182 38 E n Periods Tass Export Data mage Scale Worm Period secs Declination fanc sec piel 149 59 0 00 1 600 Create Paramount PEC File Now follow this procedure to get the PEC Curve to your mount PEMPro Reset Tool This tool allows you to reset certain features in PEMPro You can run it from the Windows Start menu Start CCDWare PEMPro Beta PEMPro Reset Tool PEMPro V2 Reset Tool Seles Reset PEMPro s Starting Screen Position Reset Full License Delete PEC Simulator Registry Settings Reset PEMPro s Starting Screen Position If you enabled the option to restore last screen position you exit PEMPro it saves its size and actual screen position and will reappear in the same location the next time it Is Started Should you ever want to reset
3. 0 00 00 000 0 00 04 306 0 00 08 327 0 00 12 247 0 00 16 303 0 00 20 289 0 00 24 365 0 00 28 260 00 12 247 00 16 303 00 20 289 00 24 365 00 28 260 CO OT GT ie Go Pa ec mek mes fm ek ek ed S Initial Worm Phase Image Roll degrees Before leaving this dialog take a moment to check that the Worm Period Image Roll Declination and Image Scale look correct If anything looks wrong click Cancel and go back to the Setup and Calibration Wizard to setup the parameters again Otherwise press Create PE Profile and Close if you are satisfied with the curve 5 Adjust Curve and upload to the mount After the Create PE Curve dialog closes in the previous step PEMPro will automatically switch to the Celestron tab and ask if you want to upload to the mount If you click Yes the curve is immediately uploaded to the mount and you are done PemPro Program Celestron PEC now 3 j N If you select No you can still program it later by pressing the To Mount button on the Celestron tab a e However if you are an advanced user you may to click No so that you can first adjust the settings in the Modify PE Curve group Controls on the Celestron tab are explained below At the top of the graph Peak to Peak PE labels the total periodic error of the curve 2 PEMPro v1 60 o x File Settings Tools Wizards Help Peak to Peak PE 36 10 Arc secs 10 0 5 0 0 0 5 0 Arc Sec
4. LX200GPS PEC Synchronization Wizard Step 1 of 3 Clear PEC Table This step will clear your mounts internal PEC table which is necessary for synchronization If you dont wish to continue press Cancel Otherwise press Next and PEMPro will clear your mount s PEC table tt PEMPro LX200GPS PEC Synchronization Wizard Step 2 of 3 Capture Pulses From your mounts hand controller start a PEC recording Once you have started the recording press the Start Sync Button PEMPro will send precisely timed pulses to the mount about 1 minute after pressing this button After the PEC is done on the hand controller press Next For your reference a timer will start to let you know how much time has passed Make sure not to move the mount with any Sotme gmesiee 0 00 Press Start Sync to start lt Back Next gt Cancel eat Now on your Meade hand box start a PEC record To do this Select Train from the R A PEC menu in the Setup Telescope menu and press ENTER After you start the PEC training on your LX200 which will last about 8 minutes return to PEMPro and press the Start Sync button Once you do that PEMPro will do a couple things 1 Start updating the timer window to the right for your reference PEC programming takes between 8 and 8 1 2 minutes so wait at least this long before going to the next step 2 PEMPro starts a one minute internal timer before sending pulses You will see the progress ba
5. fey m o per E o Yr FECON 25 Frequency Spectrum an Total Time Motor Index Worm Cycles Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine EQMOD Show Known Mount Fundamentals Known Mount Fundamentals Label Penod Description A A 478 70 Worm Drive B 366 60 Transfer Gear 174 00 Wom bearing ball E 172 00 Stepper Gear E 10 20 Stepper Transfer Drive gear teeth 1 472 69 Wor Period 1 Show selected Frequency Scope Connected Camera Not Connected Note that if Integer Fundamentals is also checked the numbers of the integer fundamentals are moved down into the graph so they won t interfere with the Known Mount Fundamentals et PEMPro v2 5 F Astrosave PemPro Tests Bruce Feagle EQMOD PE data PE 2 2 3Aug08_FOQMOD txt KE File Settings Tools Wizards Help PEC Polar Align Wizard de Finder Backlash B 1 0 0 9 0 6 DT Relative Magnitude 0 5 0 5 0 4 g3 Q2 Since both Integer Fundamentals and Known Mount Fundamentals are checked the labels for the integer oa undamentals are moved down into the Total Time ene M Wom si lt a graph so that they do not interfere with 0 11 57 11 57 a3 58 Le s 5259 the known mount fundamentals in the graph header Program Mount Refine Gemini L4 art Known Mount Fundamentals Label Period Description A 478 70 Worn Drive B 366 60 Transfer Gea
6. Astro Physics 1200GTO with GTOCP3 9OOGTO with GTOCP3 Machl GTO and other mounts using the AP GITOCP3 controller Celestron CGE CPC and Nextstar Mounts Mounts with Gemini Level 4 Meade LX 200GPS and LX 200R with Firmware 2 x or later Meade RCX 400 and MaxMount Meade Classic 16 Software Bisque Paramount GT1100S and ME Before starting you must set up the proper Guide Rate that your mount will use when issued movement commands either via the ASCOM driver or autoguider port via MaximDL V4 If you used the Setup Calibration Wizard then your guide rate has been set up already If you have a choice of a guide rate try setting it to 1x or 0 5x sidereal rate If there is no way to do this from the driver setup dialog you will have to set up the rate in your scope mount hand controller Also confirm that the Image Scale is correct This is very important 3 PEMPro Gptions Help Arc Seconds RA Worm Phase Minutes Current FA RA Aniz Graph r Scale Total Time Wom Phase Worm Cycles Samples Setup Acquire Data Analyze Program Mount Refine AP Raw PE Stop Playback Eontigure Scopes Mounts Status Ideal Pulse msec j AA AXX Penod 382 5 secs Image Scale farc sec pinel a OO OO Oo OT ee l Countdown Timer E03 Scope Connected Camera Not Connected IMPORTANT
7. 02 AWN N 0 1 Relative Magnitude 0 0 Ha requency Spectrum Curent Worm Graph Scale Total Time Phase Wom Cycles a 0 5403 0212 ia ai Setup Acquire Data Analyze Frequency Spectrum Mount Refine Gemini Gemini L4 Show Known Mount Fundamentals Known Mount Fundamentals Label Period Description A FW Voorn Drive E E 366 60 Transfer Gear SUU Worm beanng ba E 12200 Stepper Gear E 10 20 Stepper Transfer Drive gear teeth 1 472 69 Wor Period 1 5 Show Selected Frequency Scope Not Connected Camera Not Connected 5 If you select an entry in the table the Show Selected Frequency button becomes active Clicking it will make the frequency visible You may want to click the Zoom in button first a few times then click this button e PEMPro v2 5 F Astrosave PemPro Tests Bruce Feagle EQMOD PE data PE 2 23Aug08_FOMOD o t EBX File Settings Tools Wizards Help Polar Align Wizard Star Finder Backlash Relative Magnitude Frequency Spectrum Curent Worm RA Axis Graph Y Scale Total Time Phase x s386 3 1 00 37 0047 Setup Acquire Data Analyze Frequegicy Spectrum Program Mount Refine Gemini L4 Show Known Mount Fundamentals Integer Fundamentals Mount EQ6 L Known Mount Fundamentals J Feriod Description a Show Selected Frequency A ie Aom Drive Transfer Gear 174 00 W
8. Arc Seconds J e00 me 0 00 1 00 2 00 3 00 4 00 5 00 c RA Worm Phase Minutes lt All Cycles Visible RA Axis Graph Y Scale Total Time Motor Index Worm Cycles E EA ew 6 ii Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine EQMOD L PE Curve Graph Mody PE Curve PEC Quick Refinement PEC Table Data From Created PE Curve Visible Plots Plot Color Pen Weight Pen Style __ From EQMOD To EQMOD Mount 2 o m eA Solid v File E 1 eU sod v v v EQMOD PEC File PEMPro 1 P od 2 G Soiid Fade Non Active Curves 10 amp Scope Connected Camera Not Connected PEMPro uses a specially modified version of EQMOD The modifications include among other things 1 When PEC On or PEC Off are clicked in PEMPro the PEC state is properly reflected in EQMOD s user interface 2 When PEC On is clicked EQMOD s Phase Shift is reset to 0 and PEC Gain is set to 1 0 Here is the same screen shot with some items marked 2 PEMPro v2 5 File Settings Tools Wizards Help aSa EF _ __ OI bse _ e T gt PEC Polar Align Wizard Star Finder Backlash DER Fite Peakto Peak PE 2451 Arc secs PEMPro Peak to Peak PE 24 66 Arc secs Refinement Peak to Peak PE 0 00 Arc secs W To f o Q o lt 2 00 3 00 4 00 5 00 nl coats shia
9. Disconnect Scope ME Contigure Scopes Mounts Connect Camera MaximDL CCD l Use Autoguider Port to Move Scope Worn period secs 149 59 4 Min Star Brightness 10000 4 Max Star Brightness 200 ipne Indes Sync Wom Cycle 500 lt a Log and Images Dir F Astrosave PemPro Tests ay 5 Watch the countdown in TheSky and as the PEC index in TheSky reaches the number you entered for the Sync Index press the Sync Worm Cycle button If you make a mistake just try again IMPORTANT this applies only when using TheSky5 Do not disconnect from the mount or move the mount in RA after synchronizing PEMPro If you have to power cycle or Home the Paramount you will need to do this procedure again pising a Paramount PEC file in the PEMPro Create Curves i 1 Use the Calibration Wizard to define the settings of your mount if they have changed recently 2 Synchronize PEMPro to the Paramount see above 3 Acquire 5 6 worm periods of periodic error data 4 Create a native Paramount PEC data file in the Create PE Curve Dialog 2 PEMPro Create PE Curve Joj x File Graph Type Drift Fitting i AMS Error oso Periodic Error Linear 4 min 54 Secs 0 580 Graph of Data and Fitted PE Curve Periodic Error 1 5 1 5 4714 adal FFT Waveform Analysis Fundamental Freg cycles worm pernod Amplitude arc seconds Phase degrees 0 500 1 000 3 000 3333 Data Points Aad Asis s Num Time
10. Gemini Controller Genenc Hub Genenc L200 Type Scopes MM axP oir Meade L 200 and Autostar Some telescopes will require that you click Properties on the ASCOM Telescope Chooser to set up your telescope s properties such as COM port and focal length After this you will be able to press the OK button PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 3 ASCOM driver Part 1 ff your mount has an ASCOM driver AS Rivet then check Use ASCOM Driver and select ep the diver Do not connect through a hub like 3 POTH which may cause timing probleme in __ Select ASCOM Driver some cases if your mount does not have an ASCOM driver then ignore this step AstroPhysics Telescope COM pot and other setings then cick the COM port and other settings then click the anaes Edit Driver Settings button and do so Press Finish to exit the wizard and return to PEMPro s main window Other Mounts If your mount was not in the list the worm period is the only missing parameter that you need to determine The worm period can be calculated from the number of teeth in the worm gear If you click Next from Step 2 with Other selected as the mount type you will get this dialog PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 2a Enter Calculate Worm Period The Worn Period of your mount is probably the most important parameter that PEMPro uses Worm period can be directh calculated from the
11. Properties Video Calibration Values Bad Pixel Remover Enable Show Crosshairs Show FrameCount Cleanup Integrated Exposures Enable Calibration Logging This will bring up a dialog allowing you to choose your camera and resolution A AstroVidCam Setup Video Configuration Video Source Philips ToUcam Pro Camera Video Video Size Video SubType 640x480 w 1420 Close Click Close when you are done NOTE It is important that you can see the video crosshairs and frame counter in lower right If you cannot see them check that they are enabled in the Video menu If they are enabled but the crosshairs do not equally split the screen then try changing the Video Sub Type or even Video Size Here is an example of a normal working display amp PEMPro Video Interface Make sure crosshairs evenly split the window and that you can see the frame counter in the lower right PEMPro Calibrate Find Star Track Move M fe 58C j s Manual Tracking radius E wW Cursor Pos Tracking Enabled 13 69 495 0 Using the Video Interface with PEMPro Back in PEMPro select Video in the Camera dropdown list Setup Acquire Data Analyze Program Mount Refine Connect Scope Test MaximDL CCD Wom period secs CCDSoft V5 Astro Art Min Star Brightness Sync Wom Cycle Then press Connect Camera If a Windows Security alert comes up click the button that says Unbloc
12. What is PEMPro PEMPro is short for Periodic Error Management Professional t is a Windows software application that makes it very easy to characterize and reduce the periodic error of your telescope mount New features in PEMPro V2 and V2 5 Frequency Spectrum Allows you to analyze what fundamental frequencies are present in your mount Polar Alignment Wizard Quickly accurately and easily helps you dial in polar alignment Backlash Exerciser Checks the backlash of your mount Star Finder Helpful if you have a small CCD field of view to locate a star or other object when your mount s alignment is not perfect Video Interface Provides a low cost way to use PEMPro using a webcam No extra software is required What is Periodic Error and why should I care about it All telescope drives including professional drives have mechanical imperfections in the gears and worm and the worm wheel that ultimately points the telescope These imperfections occur with a period determined by the rotational speed of the driving worm gear but there can also be significant effects from other gears in the RA gear train If not corrected it makes taking unguided images impossible with even moderate focal length telescopes Even auto guided imaging is made more difficult because of periodic error It is much better if the periodic error is corrected before the auto guider gets a crack at it Then guided imaging can be more accurate and
13. cD 0 082 0 060 3 532 0 315 3 626 0 132 3 690 0 089 3 722 40 071 3 725 0 065 cmc mek ce ek ek et et Before leaving this dialog take a moment to check that the Worm Period Image Roll Declination and Image Scale look correct If anything looks wrong click Cancel and go back to the Setup and Calibration Wizard to setup the parameters again Otherwise press Create PE Profile and Close if you are satisfied with the curve Adjust Curve and upload to the mount After the Create PE Curve dialog closes in the previous step PEMPro will automatically switch to the AP Raw PE tab and ask if you want to upload to the mount If you click Yes the curve is immediately uploaded to the mount and you are done xj P Program AP GTOCP3 PEC now 7 If you select No you can still program it later by pressing the To Mount button on this tab Te om However if you are an advanced user you may to click No so that you can first adjust the settings in the Modify PE Curve group Controls on the AP Raw PE tab are explained below At the top of the graph Peak to Peak PE labels the total periodic error of the curve Ett PEMPro v1 60 i _ O x File Settings Tools Wizards Help Arc Seconds oe aia aes me PEM RE RA Worm Phase Minutes All Cycles Visible Current Worm RA RA Amis Graph Y Scale Total Time Phase Worm Cycles Samples X oF 20 50 2 11 14 01 12 14 423 Setu
14. 35 419 467 92 Click OK to start the calibration or Cancel to abort If you clicked OK the star will track first in RA then in Dec for the dec rounout time pause briefly then continue The calibration results will then display File Video Help Image Scale 1 911 Arc sec pixel Image Angle 13 5 Degrees Guide Rate 1 00x Sidereal x m allibrate OIDI ate PEMPro d Star Calibrate C nd Star Track Aro sec pxe Move a Image 191 5 Tracking radius E B fw Scale L 1 itt S S Degrees Cursor Pos Tracking Enabled aes 1335 12 207 1 At this point you can go back to PEMPro and Acquire Data You can also do polar alignment and backlash functions and use the Star Finder feature For testing purposes you can use the Find Star and Track group boxes The Tracking Radius track bar can be used to adjust the sensitivity of the tracking It is best left at the default position center IMPORTANT If your camera is an 8 bit camera please make sure to set the min max brightness in PEMPro s setup tab to 0 256 Bad Pixel Remover The Video Interface allows you to select bad pixels When selected the bad pixels are replaced with the average of surrounding pixels This can prevent false slection of a star that really is a bright bad pixel sa PEMPro Video Interface ES i File Video Help 1 Click on video window to select an area with hot or bad pixels iy j ERN r E 7 Da _ xt f
15. Enter a number here and press Add to add it to the fundamentals list Add Add pressing this willadd the fundamental you Delete entered to the list on the right Delete Click on an item in the Fundamentals list and this button will activate Click it to delete the fundamental tery o Apply Activates when you have added or deleted a fundamental Pressing it will cause the Create PE Curve dialog to recalculate and display the periodic error curve The Edit PE Fundamental Frequency dialog will remain open OK Pressing it will cause the Create PE Curve dialog to recalculate and display the periodic error curve The Edit PE Fundamental Frequency dialog will close Cancel Pressing will exit without applying any changes made to the Fundamental list Note that any previous changes to the Fundamentals list that have been applied are not canceled Program Mount With this tab in PEMPro you can program the periodic error out of your mount If you just finished creating a curve the curve will display on the graph If you ever need to examine the curve at a later time it can be loaded via the Refine page The curves are text files with extension ppc and are placed in the logs directory specified on the Setup page PEMPro can upload PEC data directly to some mounts This is usually much a quicker procedure and more accurate You should use that procedure instead if your mount is one of these types
16. If you don t have an AP mount you MUST manually enable the periodic error recording feature of your mount with your hand controller or control software as appropriate If there is a way in software to enable the PE recording we will implement that later Start Playback First you will need to connect to your scope on the Setup page or if you are using MaximDL V4 and your camera and mount support an auto guider interface you will just need to connect MaximDL V4 Press the button to start playing back the corrected periodic error to the scope Pressing Start Playback will gray out a number of controls and change the text of the button to Stop Playback If you have an AP GTO mount selected on the Setup page the mount is sent a command to automatically start PE recording Note playback of the periodic error correction curve will continue until you stop it The graph will display in yellow the portion of the curve that has been played back Additionally on the second cycle the table entries will show as green so you know a full cycle has completed and the Countdown Timer will go negative Refine After a first pass of programming the periodic error from your mount you may wish to see how well your mount PEC was programmed You can then optionally refine the periodic error correction curve even more PEMPro gives you the capability to do this with the Refine page see below t PEMPro w 1 50 Fi Astrosave PemPro Tests Giampa
17. PEC curve Export Data Here is the data in the Create PE Curve window accessed by pressing Create a PE Curve The original data is graphed in red and the proposed fitted curve is in blue PEMPro Create PE Curve File lt i T 12 000 0 922 279 5 15 000 1 426 200 2 j mI an oon moore mam om Data Points RA Axis L X ha J Q 00 000 Tas 352 3 474 2 0 00 04 196 1 00 04 196 6 089 3 157 9 246 3 00 00 08 672 00 08 672 5 944 2 809 8 793 4 00 00 13 649 1 00 13 649 7 069 2 416 9 495 5 0 00 18 566 1 00 18 566 6 826 2 077 8 852 6 0 00 23 454 1 00 23 4594 7 607 1 645 9 253 T 0 00 28 080 1 00 28 080 7 928 1 308 9 237 a 0 00 32 747 1 00 32 747 6 692 1 993 7 685 Initial Worm Phase Image Roll degrees 20 44 05 E 1 58 PE A Cancel Export Data Wom Pernod secs arc sec poe 436 07 2 94 Create PE Profile and Close E The first thing to look at is the RMS Error in the upper right of the dialog enclosed the field with a red box in the above picture This is the measure of the error fitting the drift and fundamental frequencies The lower this number the better the fit to the data A RMS error of 4 024 is rather high so the curve fit is probably not optimal High RMS error can also be caused by things such as very bad seeing rough drive train gears and imperfec
18. Pressing this will disable the mount s PEC RA Seg Shows the running RA PEC segment PEC must be on for this to display Sync PE Pressing this will synchronize PEMPro to the mount s RA PEC Segment counter You Should press this once when before you start acquiring data and whenever you notice the counter does not look synchronized in PEMPro The Hand Box and or PEMPro may not update immediately so they may not always look exactly synchronized In general if the counts ever are more than 1 unit apart then it is time to Sync PE again It is always very quick and easy to use this button so if you are unsure just use it IMPORTANT If you slew or move the telescope you will need to resynchronize PEMPro if you want to acquire more PE data If you have High Accuracy Sync checked recommended then PEMPro will more accurately calculate the worm phase of the mount It does this by averaging the time at which the segment counter changes 15 times This takes about 35 seconds but it improves the accuracy of the resulting worm phase that PEMPro can use to about 0 1 seconds Without this option checked the worm phase is accurate to only about 1 second because the hand box updates its display at somewhat irregular intervals Focus Display updates every 1 0 Seconds BNIN TI EEEE pin imi i Clicking HA ole synchronize PEMPro to the RA PEC Seg counter so that the PEC Curve can be directly u
19. Setup Acquire Data Analyze Frequency Spectrum Program Mount j 2 innect Scope Gemini Telescope z C Southem Hemisphere To active the Calibration Wizard select its menu option 26 PEMPro v2 5 File Settings Tools ireiee Help PEC Polar Align W Mount Wizard If you are not familiar with the steps of the Calibration Wizard then you can find how to use it here Calibration Wizard Acquiring Data Make sure that you are connected to the mount and the CCD camera as described above You will know you are connected when the scope and camera drop down list boxes are grayed out and the buttons say Disconnect Scope and Disconnect Camera as shown here Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine Gemini L4 Configure Scopes Mounts Gemini Telescope C Use Autoguider Port to Move Scope Worm period secs C Southem Hemisphere Also make sure that Gemini Telescope appears in the text box next to Configure Scope Mounts Important Do not connect to the Gemini through an ASCOM hub such as POTH Make sure that the text field to the left of the Configure Scopes Mounts button says Gemini Telescope If not press Configure Scopes Mounts and change the ASCOM driver to be the native Gemini driver One other thing you will want to do is to make sure PEC is off PEMPro has convenient buttons t
20. Tres S 3 7 Arc mins Drift Scale 16 00 AT Show adjustment in arc seconds nies mins arc secs in tad Telescope Altitude F Show Hour Angie 52 24 A 1 6h 01 m a Azimuth Dee 00 00 W 136 20 Slew Scope i n omae B s Wy 15 arcmin lw Scope Connected Camera Connected 11 Click Next see picture below Click Reference Image to take a snapshot of the current position in the sky NOTE Although not shown in the pictures of Step 6 below there are now an Overlay Color button present Clicking this button brings up a dialog that allows you to configure the color and transparency of the text arrows and circle used at times in this step PEMPro Overlay Color Picker Transparency 50 98 Wj 2 PEMPro v2 0 3 Ef File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Adjust Mount s Azimuth oa CTO Step 6 of d Azimuth Eror Full Screen Step ba Press Reference Image to get a reference image Reference Exposure Image Settings Click on the brightest star PEMFro will display the direction and distance to move the star IF NEEDED slew scope to reposition the star or find a nearby brighter star Remember to press Reference Image again after slewing Step 6b Adjust mount s AZIMUTH until the star moves near to the end of the amow Press Take Image to view an image of the star position Take Image Continuous Telescope Altitude F S
21. You can then import the curve to the AP Raw PE tab by pressing the From Created PE Curve button Setup Acquire Data Analyze Program Mount Refine Gemini L4 PE Files Step 1 Select previously created curve PemPro 2006 02 12 175951 ppc eee es Invert Rev Clear Info Rev These are the functions you can do to the periodic error curve as a whole lt Shift Shifts the curve left by the number of cells in the Shift Value field The cells of the GTOCP3 vary depending on the worm period There are 970 cells total which means that for a mount with 383 seconds each cell is about 0 4 seconds So the time shift of one cell is 0 4 seconds Note that since the left hand edge of the graph always starts at 0 the whole level of the curve will change as you shift however the shape and magnitude of the curve will not change Here is a picture showing an example of shifting a curve Note level of entire curve changes Shift gt Shifts the curve right by the number of cells in the Shift Value field The cells of the GTOCP3 vary depending on the worm period There are 970 cells total which means that for a mount with 383 seconds each cell is about 0 4 seconds So the time shift of one cell is 0 4 seconds Note that since the left hand edge of the graph always starts at 0 the whole level of the curve will change as you shift however the shape and magnitude of the curve will not change Invert Inverts the curve as shown
22. and AstroArt V3 V4 Additionally PEMPro can natively work with any webcams that have a windows WDM or DirectDraw driver This includes the poular Philips Toucam serries Philips SPC900 Meade LPI Celestron Nexl mage and the entire USB Firewire line of monochrome and color cameras from The Imaging Source http www theimagingsource com en products cameras When you connect to the mount the worm period and phase are automatically read from EQMOD PEMPro then automatically synchronizes itself to the mount Whenever you start Acquiring PE data PEMPro automatically synchronizes to the mount This allows you the freedom to move the mount around without worry of forgetting to re synchronize There is absolutely no need to click any buttons in EQMOD PEMPro can control all of the PEC settings PEMPro works directly with webcams ThelmageSource Cameras all Meade DSI series cameras CCDSoft MaximDL and AstroArt BEFORE STARTING Please make sure that you install the following in this order PEMPro must be last so it can update the EQMOD ASCOM driver with a specially modified version for PEMPro 1 The Net Framework 2 0 and all Microsoft patches http 4362 4BOD 8EDD AAB15C5E04F5 amp displaylang en 2 Install the ASCOM Driver Platform V5 http www ascom standards org Downloads Index htm 3 Install any version of the EQMOD Installation http www ascom standards org Downloads ScopeDrivers htm 4 Install PEMPro V2 5 Build 60 or later
23. http www ccdware com downloads Note that the install is a 60 day free fully functional trial Step 1 Start PEMPro and Use the Mount Wizard to create an EQMOD instance E PEMPro v2 5 Click here or press the F8 key to start the Mount Wizard Arc Seconds 1 00 2 00 RA Worm Phase Minutes Current Worm RA Total Time Phase Wom Cycles amples 004 os o o Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine Test v ScopeSim Telescope Video v C Use Autoguider Port to Move Scope Wom period secs 14754 E C Southem Hemisphere Min Star Brightness 3 Max Star Brightness 100000 Log and Images Dir C My Documents CCDWare PEMProV2 When the mount wizard dialog opens you can enter any name you want for the telescope 2 PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 1 Description Enter a descriptive name or phrase for your telescope mount This name will appear in the scope drop down list box on the Setup tab in PEMPro s main form Orion Altlas EQ G Enter a descriptive name for your telescope mount 2 PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 2 Mount Type Telescope Mount Type If you dont see your mount type select Other Losmandy G 11 SkyWalker GPS 16 Click Next gt to continue Epe PEMPro Mount Quick Setup Wizard STEP 3 ASCOM
24. 3 Fast Ctrl 4 The focuser will start moving when you press the In or Out button and i Single Step Focusing keep moving until you release the button However if Single Step m Focusing is checked then each press of the In or Out button will move the focuser for about 1 100th of a second The timing should be accurate as the command uses the Meade FP command which specifies an exact C High Accuracy Syne 35 secs number of milliseconds to move for the LX200GPS and number of encoder ticks to move for the RCX400 Editing PEC Cell Data You can also edit data in individual cells You can double click anywhere in the graph area and that will find and highlight the line in the table associated with that point on the graph Then if you double click the table entry that will bring up a dialog that allows you to manually edit the data This is what that dialog looks like Make your changes and press Close to exit the dialog Changed values are reflected on the graph and can be written to a file or back to the mount EMPro Case Study of a Meade RCX 400 s Periodic Error Feb 20 2006 The data and analysis below is from Doc Greiner s RCX400 which was operated by Greg Sellek Greg acquired most of the raw data analyzed In this article will go through the steps of refining the PEC and come to an interesting conclusion First here is the raw data periodic error data collected by Greg Sellek for the RCX400 on Februa
25. Count Aresecs Accumulated Jal lt lt 0 000 Normal 10 0 00 oo 0 00 PEC OFF PEC ON _PECOFF _ i E Invert Curve fis ikona 39 1 2 0 374 West 1 5 me Curve Tweaking 4 1 8 0 West 1 _ Sampling 10 steps Phase 0 0 secs gt ore T E A 7 Normal 39 GuideRtate 0 52 Recenter West 1 Scope Connected Camera Connected Check Corrected PEC After you upload the new PE correction curve you will want to turn PEC On and acquire at least 2 worm cycles of data If you see that the periodic error is worse than before you can go back to the Gemini L4 tab and check the Invert Curve checkbox and then click To Mount to send the curve to the mount again Then start the acquire data again The mount s periodic error should be significantly reduced West 1 Normal 59 r 5 3 East 1 t Ae aie ed EES E ceed ed er rid es i Normal 9 GudeRate 05x West i Curve Tweaking Samp ng 10 steps Fhase 0 0 secs If after checking the corrected periodic error of the mount you find that you want to try for further improvement you can use the Refine feature Gemini L4 Tab features Below is the Gemini L4 tab before connecting to the mount All the buttons and controls are disabled except the From File button and the Show Saved PEC checkbox If you click From File you can load in a previously saved PEC curve The table will then fill with entries from the file and a graph of t
26. DSI or LPI Series camera Your webcam video camera software If you plan to run PEMPro s native video application Start on of the software applications above and connect to your camera to make sure the camera works by taking a quick snapshot image If you plan to run PEMPro s native video application please start it first from the Windows Startup menu Confirm that you can connect to your telescope with your planetarium program e g TheSky or DeskTop Universe AU RWNE License Agreement The following statement must be read and agreed with before you can Install this Software Product PEMPro IMPORTANT PLEASE READ CAREFULLY THIS IS A LEGAL AGREEMENT BETWEEN YOU AND SIRIUS IMAGING RAY GRALAK BY INSTALLING COPYING OR OTHERWISE USING THE SOFTWARE PRODUCT YOU ARE AGREEING UNCONDI TIONALLY TO BE BOUND BY THE TERMS OF THIS LICENSE AGREEMENT EVEN IF THIS LICENSE AGREEMENT IS DEEMED A MODIFICATION OF ANY PREVIOUS ARRANGEMENT OR CONTRACT IF YOU DO NOT AGREE TO THE TERMS OF THIS LICENSE AGREEMENT DO NOT INSTALL OR USE THE SOFTWARE PRODUCT 1 For the purposes of this License Agreement Software Software Product or Software Patch refers to the computer software and associated media printed materials and online or electronic documentation including any and all executable files tutorials help files utilities and other files that accompany this product The Software Product is owned by Sirius maging Ray Gralak an
27. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND OR OTHER PARTIES PROVIDE THE SOFTWARE PRODUCT AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FORA PARTICULAR PURPOSE THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE PRODUCT IS WITH YOU SHOULD THE SOFTWARE PRODUCT PROVE DEFECTIVE YOU ASSUME THE COST OF ALL NECESSARY SERVICING REPAIR OR CORRECTION IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER OR ANY OTHER PARTY WHO MAY MODIFY AND OR REDISTRIBUTE THE SOFTWARE PRODUCT AS PERMITTED ABOVE BE LIABLE TO YOU FOR DAMAGES INCLUDING ANY GENERAL SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE PRODUCT INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE PRODUCT TO OPERATE WITH ANY OTHER SOFTWARE PRODUCTS EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES have read and agree to the terms of the license agreement as set forth above Copyright 2004 2008 Ray Gralak Sirius maging Setup Page The setup page has most of the basic settings Setup Acquire Data Analyze Program Mount Refine l AP Raw PE Connect Scope MAP GTO Mout O x Configure Sco
28. File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Welcome to the Polar Alignment Wizard is Wizard will help you polar align your telescope very quickly and easily This Wizard will help you polar align your tel pe very quickly and easily To get started make sure you have your mount approximately polar aligned To continue click Next Cancel Telescope Sew z Distance Scope Not Connected Camera Connected 5 Optionally check off the items in the Pre Start checklist a The telescope should be roughly aligned although it can be off by roughly 10 degrees or more and this procedure Should still work b If possible level the tripod or pier as much as possible Doing so will reduce the number of Altitude and Azimuth iterations to achieve best polar alignment c Point the scope to South approximately at the celestial equator ef PEMPro v2 0 Beta Fil Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Polar Alignment Pre Start Check List Check off these items before starting If an item does not apply check it C Telescope is setup and is roughly polar aligned C Tripod or Fier is leveled as much as possible This will reduce the chance that multiple adjustments will be required in each axis E F your scope has GOTO capabilities make sure it is synched to a star or unparked from a known alt az position This does not need
29. Image Scale Worm Period Pulse Modulo Pulse Pad Aggressiveness L Celestron CGE Meade Ls200 all types 0 700 475 69 10 00 0 00 0 00 1 00 7 00 O AF 400 600 AstroPhysi AP 400 600 GTO Rev D 2 230 446 77 10 00 0 00 0 00 1 00 1 00 11005 Paramount 17005 1 000 239 34 10 00 0 00 0 00 1 00 1 00 EI LX 200GPS MeadeTel Meade LX200GPS 1 352 47869 100 000 1 00 1 00 O L 200 16 beade Tel Meade Ls200 16 Classic 1 352 239 34 10 00 0 00 0 00 1 00 1 00 O Classic L200 scopesim Meade Ls200 Except GF 1 000 470 69 10 00 0 00 0 00 1 00 1 00 Step 2 Connect to your mount and camera control program and use PEMPro s Calibration Wizard to set up all of PEMPro s important parameters Use ASCOM as the movement method Step 3 With the mount and camera still connected press the Synch Worm Cycle button on PEMPro s Setup page PEMPro v1 50 Arc Seconds 0 00 1 00 2 00 3 00 4 00 5 00 RA Worm Phase Min a ea _ All Cycles Visible gt Total Time Woon Phage Worm Cycles rx 5000 Sas SES ogee SE Setup Acquire Data Analyze Program Mount Refine LX 200 GPS Connect Scope LX200GPS x Configure Scopes Mounts MeadeTelescope Connect Camera Mamoe I Use Autoguider Port to Move Scope Worm period secs Min Star Brightness 100 MaxStarBrightness 20000 Syne Worm Cycle Log and Images Dir F Astrosave PemPro Tests Step 4 A wizard dialog will pop up asking you to first clear your PEC Od
30. Lines are ignored 3 Anew mount name Tag starts on a line that begins with a For example AP1200GTO 4 Avoid using the exact same mount tag name more than once Only the first will likely be used 5 Any number of mount fundamentals can follow a Tag line one per line The format is the period in seconds followed by a SPACE character ASCII 32 followed by a text description The entire text description MUST be on the same line For example 100 22 Stepper Gear Motor 6 Multiple mounts can be contained in the same file When a new mount tag line starts the frequencies are assigned to that tag Here is an example of a file containing multiple mounts and multiple fundamentals EQ6 478 7 Worm Drive 366 6 Transfer Gear 174 Worm bearing ball 122 Stepper Gear 10 2 Stepper Transfer Drive gear teeth HEQ5 638 2 Worm Drive 380 2 Transfer Gear 232 Worm bearing ball 122 Stepper Gear 13 6 Stepper Transfer Drive gear teeth EQ5 598 4 Worm Drive EQ3 662 8 Worm Drive Create PE Curve Important the curve fitting calculations are CPU intensive and could take seconds or even tens of seconds to calculate the best fitting Fourier series A Small pop up dialog appears and an hour glass cursor appears while processing so you know calculations are going on Everything is recalculated if you change RA Axis Interpolate Points or change the drift fitting polynomial H PEMPro Create PE Curve Graph Type Drift
31. Maximum Brightness which are defined on the Setup page After this it only takes smaller subframe exposures around the star so downloads are very quick It automatically tracks the star so you don t have to worry that the star will fall off the sub frame There are four subframe options 16x16 24x24 50x50 recommended and 100x100 pixels Image Scale The image scale of the loaded data Note that if you change binning you must edit this value to reflect the image scale Note that you can alter this before creating a PE Curve Start Pressing this button will take an initial full frame exposure to locate the brightest star the one you should have centered earlier followed by a number of smaller images the size of the subframe you selected Once pressed the name of the button becomes Stop Pressing the Stop button will stop the exposure sequence Note that is a long download is in progress the stop operation might not seem to happen until the image download is complete If you have an Astro Physics GOTO mount and it is connected when you press the Start button a pop up dialog will appear see to the right that will ask you if you want to enable PEC or not If you do not have that type of mount or you are not connected to the mount then a warning dialog will display asking you to make sure you have set the mount into the proper mode Periodic Error Cancel Acquiring Data y Correction ON or OFF before you start recording data a Enable
32. North or South If you are using the Video Interface then you must calibrate by clicking the Calibrate button PEMPro will automatically find the brightest star If PEMPro chooses a hit pixel cluster then use the Bad Pixel Remover tool to eliminate those pixels Calibrate Find Star Track Sede Manual _ ng rad Scale _ 38arcs on gead r Cursor Pos 4 l Ange 1493deg 7451 0 If you are using a Meade DSI or MaximDL CCDSoft or AstroArt you should use the Calibration Wizard Step 5 Acquiring PEC Data Click on the Acquire Data tab Select the Exposure Time and Exposure Delay delay between exposures If seeing is bad you can use longer exposures 2 seconds to tame the seeing If Seeing is good or you are using a web cam set the intervals to small values 0 01 seconds You can enable disable PEC for the EQMOD just by clicking PEC On or PEC Off For inital data collection you will want it off Click Start when ready If you want to do a very long duration PE measurement you can check Enable Automatic Stop and enter the number of hours to record WARNING If something happens to your PC and PEMPro cannot issue the stop command to the mount it is possible that the telescope could eventually strike the tripod So use this feature at your own risk Et PEMPro v2 5 PEK aa PEC Polar Align Wizard Star Finder Backlash 50 0 0 0 50 0 Arc Seconds 0 00 1 00 2 00 3 00 4 00 5 00 6 00 7 00 8 00 s
33. RA Worm Phase Minutes m RAAxis Graph Y Scale Total Time Motor Index Worm Cycles Samples x i 2307 32731 1380 7 E 1351 Mody PE Curve PEC Quick Refinement PEC Table Data From Created PE Curve Visible Plots From EQMOD To EQMOD pen Wagt fen Sie g 2 Mount 2 TH 4 Solid Fie 1 9 Soa FOMOD PEC Fie PEMPro 1 U solid Refinement amp 4 2 amp o Solid Fade Non Active Curves 10 Scope Connected Camera Not Connected 1 Clicking PEC ON turns on PEC Clicking PEC Off turns PEC Off You should see this reflected in the label above the buttons and also in EQMOD s display NOTE If PEC is disabled in EQMOD PEMPro won t know about it Double clicking the PEC Status label in PEMPro will reread the PEC state from EQMOD 2 The graph can display up to 4 curves and their Peak Peak periodic error a A curve from PEMPro by clicking From Created PE Curve b A curve from the Mount by clicking From EQMOD c A curve loaded from a file by clicking From File d A Refinement curve explained later 3 This section you to import export PEC curves From Created PE Curve loads a file onto this tab that was created by PEMPro s Create PE Curve dialog or Refine tab From EQMOD downloads the current PEC curve from EQMOD This curve can then be modified on the Modify PE Curve tab discussed
34. Settings Summary De Rotate Data Adjust Data for Declination Calibrate Images when Acquiring Data Disconnect Scope on Disconnect Disconnect Camera on Disconnect Disable Fundamental Auto Find Keep Main Form on Top Restore last position when starting Ask for Filename and Comments when Acquiring Data Night Screen Mode This will bring up PEMPro s Meade DSI Settings window Meade DSI Settings DSI Pro 3 ain Offset Readout Delay Use Custom Settings Readout Mode L q A Lem bza Feil ec High Vdd Mode AlwaysOn 1 ee inti Bus Speed Exposure Mode Normal 1 High Read Camera Settings A trick to get the proper settings is to disconnect the camera from PEMPro start Envisage and take an image of the desired duration Once that is done immediately exit Envisage and connect PEMPro to the DSI again Then click Read Camera Settings The Gain Offset and Readout Delay are usually the important settings that can be pulled from the camera Images taken within PEMPro will then use those settings and the custom settings if Use Custom Settings is checked Typically you should not need to enable Use Custom Settings but if you do you will force the settings in that group box Only modify those settings if you are an advanced user and are having problems getting a good image Note that the DSI seems to use different sett
35. Unparked and in Sidereal tracking mode PARK to Home Position IMPORTANT Slew your mount to somewhere near 0 declination and just west of the meridian If the view is obscured then change the declination until you have a good view To slew to a good location you can use PEMPro s Calibration Wizard click this menu Wizard gt Calibration Wizard Et PEMPro v2 5 PEMPro Setup Calibration Wizard e deo Interface You can use this page to move the scope but use the Calibrate button in the Vi Point your telescope at a Magnitude 5 8 star near Declination 0 and just west of due South North if you are in the Southern Hemisphere Ifthe scope is connected the Declination and Right Ascension will update Adjust the position of the scope until the background of the Declination and Right Ascension text boxes turn green The position of the scope will be shown as a small red square After this is done press Next ___ Declination Position Scope te a poe ea __01 00 00 0 a Side of Meridian __ Right Ascension E S West v 19h 37m 44 9s f Degrees Relative 5 Hour toMendian _ TERIA TE 00h 04m 44 55 itude 53 34 01 1 Azimuth j 1 81 59 41 1 C Intemally calculate Alt Az Typically you want to be West of the meridian so that the telescope is starting off at the highest point for that declination Note that although O declination is the best to use you can use any declination up to 75 degrees
36. Upload button to send the curve to the ME firmware IMPORTANT Do not hit the Curve Fit button 10 When upload is complete reboot the mount For MKS3000 systems the mount power must be recycled For MKS4000 systems the one with the USB port hit the Normal button under System reboot With both systems you will then need to re home the mount and the uploaded PEC curve Should show on the Periodic Error Correction tab Paramount Quick PEC Wizard With PEMPro you can also process the exact same CCDSoft Tracking files that you use as input to PrecisionPEC PEMPro makes the process event simpler by providing this very easy to use wizard You can access the wizard here 2 PEMPro v2 0 File Settings Tools Biireieem Help Mount Wizard F Calibration Wizard ee i PEC Polar Align W The Wizard consists of a simple 4 step process In Step 1 you select a previously created CCDSoft Tracking file to use Press Open Log File and browse to the CCDSoft Tracking file that you wish to use ef PEMPro v2 0 F Astrosave PemPro Tests Imager log Malta step 1 of 4 Load a CCDSoft Tracking Log File Load a CCD Soft Tracking File Show me how to create a suitable CCD Soft Tracking Log File requires Intemet connection Open Log File CCDGoft Tracking Fie F Astrosave PemPro Tests lmager log _ Data Points in File MPlus Angle key RA Axis Declination m zwe y vo75555555665 PEMPro improves on w
37. X Drit X Drift o0 C Adjust Y for Y Drit Y Drift om E Pnie Atomik Subtrame 100x 100 v XY in anc seconds Stop hours er f oe on Num Time Wom Cycle Wom Ph Centroid Centroid Max Pace Exposure Delay Seconds uo g Image Scale Arc 520s F mel e Enhancement dramatically improved star detection algorithm e Enhancement when a star is not found because of the min max star brightness range a popup message is displayed detailing the number of stars found and the high low range limits e Enhancement Video Interface now queries declination from PEMPro before doing a calibration Calibration settings are now configurable The Calibration Values dialog will pop up when Calibration is started Enter Video Calibration Values Calibration Times RA 1 Seconds Dec 5 g Seconds Other parameters Star Declination 00 F Degrees Balla Pixel Size x 10 00 a Microns Y 10 00 Microns Dec Backlash Runout Time 20 E Seconds oe OK Cancel Minor Enhancement improved cursor appearance in sevaral windows Fix Fixed bug in Data display when the Sync button was pressed Fix All IC Imaging Control USB Firewire color mono cameras now work with the video control Numerous other little changes and enhancements V2 00 June 25 2008
38. You can always get the latest version from http www ascom standards org downloads html Select your camera control program and connect to your CCD camera by pressing the Connect Camera button Also make sure that Use Autoguider Port to Move Scope is unchecked Setup Acquire Data Analyze Frogram Mount Refine AP Raw PE Disconnect Scope My new AP Mount cence Stee Uncheck this then click nos Connect Camera onnigure scopes Mounts AstroPhysics Telescope PEMPro v1 60 File Settings Tools Wizards Help If you are not familiar with the steps of the Calibration Wizard then you can find how to use it here Acquiring Data Make sure that you are connected to the mount and the CCD camera as described above You will know you are connected when the scope and camera drop down list boxes are grayed out and the buttons say Disconnect Scope and Disconnect Camera as shown here Setup Acquire Data Analyze Program Mount Refine AP Raw PE AstroPhysics Telescope ontigure Scopes Mounts AL nder Fort to Move Scope Also make sure that AstroPhysics Telescope appears in the text box next to Configure Scope Mounts Important Do not connect to the mount through an ASCOM hub such as POTH Make Sure that the text field to the left of the Configure Scopes Mounts button says AstroPhysics Telescope f not press Configure Scopes M
39. a a a a Graph Modify PE Curve PEC Quick Refinement PEC Table Data Curve Phase Adjustment PEMPro Created Curve Last Loaded from EQMOD Last Loaded File Smooth Anessa a Ml s ee Curve MN Total Phase Adjustment EQMOD PEC File Motor Ticks Secs Load eevene l l If you have Upload changes immediately to mount checked then the active curve will be automatically sent whenever a change is made IMPORTANT If this option is not enabled you must click To Mount to upload to the mount any changes you make When uploading PEMPro will ask you which curve you want to upload the default being the Active curve If you have Enable PEC Drawing with Mouse checked you can hand modify the active curve e PEMPro v2 5 Sele File Settings Tools Wizards Help Polar Align Wizard Star Finder Backlash PEMPro Peak to Peak PE 24 67 Arc secs When Enable PEC Drawing with Mouse is checked you press and hold the left mouse button while moving the mouse to modify the active PEC curve Arc Seconds 3 00 4 00 5 00 8 00 RA Worm Phase Minutes RA Axis Graph Y Scale Total Time Motor Index Wom Cycles Sampi x ai 2307 g 0 06 55 33247 1 1351 Setup Acquire Data Analyze Frequency pectrum Program Mount Refine EQMOD PE Curve pm 1 00 _FEcorF OFF aiiin 4min 52 86 sec 3 54 ArcSecs Graph Modify PE Curve P
40. a full license If you have purchased a PEMPro V2 Upgrade license key simple cut and paste all five lines of the license into the text area in the PEMPro Trial dialog Here is an example of what you need to paste into the trial dialog Note that you must include the keyword prefix at the start of each line e g Product Name etc So copy the entire 5 lines into the dialog Product PEMProV2 Upgrade Name Jane Doe Email jane user xyz Date 2007 07 13 RegCode jXUh 1 2 hjSA LxcQ 0863 If you are upgrading from V1 you will also need to cut and paste your V1 license key The dialog will itell you when it is ready for you to copy and paste the V1 license key After entering the license information the PEMPro Trial dialog will no longer appear when PEMPro V2 is started Product PEMPro Name Jane Doe Email jane user xyz Date 2006 01 11 RegCode jL7q jTu GM 4 Hzds 0529 IMPORTANT Treat your full or upgrade license key as confidential information Please do not Share it with anyone A full or upgrade license entitles you to install PEMPro V2 on any number of your own personal computers but note that you are licensed to use PEMPro V2 on mounts or scopes that you personally own Other Preparations Before Running PEMPro V2 Confirm that one of the following is installed MaximDL v3 22 MaximDL v4 50 or later CCDSoft V5 00 174 or later AstroArt V3 V4 or later Meade Autostar Suite if you want to use a Meade
41. after you press any button It updates faster 0 2 seconds if the RA Segment is being shown Pressing any of the buttons outside of the Quick access area will emulate a button press on the Hand Box Also note that at the bottom is the telescope s current Declination Right Ascension and Hour Angle The hour angle is especially useful because it tells how far the mount is pointing from the meridian The meridian runs overhead from north to south Objects rise in the east transit the meridian and set in the west An object on the celestial equator declination 0 takes 12 hours to cross the sky from east to west Hour angle HA is defined as the length of time since an object transited crossed the meridian So if HA is negative the mount is to the east of the meridian if it is positive it is west of the meridian xi Focus Depky updates every 3 0 seconds Quick Access Buttons RA Seg PEC On rocas Syne PE PEC Off Out T High Accuracy Syne 35 secs There are six Quick Access buttons that you might find useful Focus In Pressing this will move the focuser in Focus Focus Out Pressing this button will move the focuser out eae You can find more details about using these buttons in the section on focusing below Quick Access Buttons pases _PECOn Sync PE PEC Cif Out High Accuracy Syne 35 secs PEC Oni Pressing this will enable the mount s PEC PEC Off
42. are reflected on the graph and can be written to a file or back to the mount Meade RCX400 LX400 ACF IMPORTANT PEMPro only works in equatorial mode Please make sure that you are using a wedge or other means to polar align and that Polar is selected in the RCX400 hand controller s Telescope Mount menu Alt Az is the default setting These directions apply specifically to the Meade RCX400 and LX400 ACF PEMPro has some very nice features for these mounts PEMPro can directly upload a PEC curve to either the normal or Factory PEC table Here are the steps you should follow Step 1 Make sure the RCX 400 is selected as the mount type in PEMPro s Mount configuration dialog If you are just starting out you should create a new mount entry in PEMPro with the Mount Wizard which will set up all of the important parameters Make sure Southern Hemisphere is checked on the Setup page if you are located south of the equator Step 2 Locate a 5 7th magnitude star near the meridian and O declination Step 3 Connect to your mount camera control program and use PEMPro s Calibration Wizard to set up all of PEMPro s important parameters Use ASCOM as the movement method You should always run the Calibration Wizard at least once if you are going to acquire data You will also want to run it again if you change the camera angle telescope image train etc Step 4 After completing the calibration wizard press the Hand Box button oos22
43. dialog will pop up warning you of that At the time of this writing version 4 2 17 is the current version You can usually get the latest version from http www ascom standards org downloads html In case the 4 2 17 release has not yet been posted you can temporarily download from here http www siriusimaging com PEMPro CelestronDriver4217 zZip Select your camera control program and connect to your CCD camera by pressing the Connect Camera button Also make sure that Use Autoguider Port to Move Scope is unchecked Setup Acquire Data Analyze Program Mount Refine Celestron Configure Scopes Mounts Celestron Telescope Use Autoguider Port to Move Scope i Uncheck this then click Ka Connect Camera ASCOM PEMPro v1 60 File Settings Tools Wizards Help Mount Wizard F E 15 0 If you are not familiar with the steps of the Calibration Wizard then you can find how to use it here 3 Acquiring Data Make sure that you are connected to the mount and the CCD camera as described above You will know you are connected when the scope and camera drop down list boxes are grayed out and the buttons say Disconnect Scope and Disconnect Camera as shown here Setup Acquire Data Analyze Program Mount Refine Celestron Celestron COGE1400 Tonigure Scopesi Mounts Celestron Telescope MadmDL CCD V Use Attoguider Port to Move Scope Worm period secs South
44. downloading the curve Inverting it in PEMPro then uploading it back to the mount Be sure to check that this fixed the problem PE should be reduced Periodic error is 1 Make sure to run the Calibration Wizard before not changed doing an Acquire Data Any setting that is despite being incorrect especially image scale will result in an programmed into inaccurate correction the mount 2 If playing back to th emount make sure you have the correct axis selected Most often RA is the X axis 3 Make sure PEC is enabled on the mount In the Calibration If Settings De rotate data is checked and you ran Wizard PEMPro the calibration wizard PEMPro will derotate the data correctly identified so RA is always displayed on the X graph the Y axis as RA but the main graph shows a flat curve for Y and what looks like periodic data in the X graph Curves don t line 1 The mount has a non integer harmonic that is not up on the main correctable by PEC because it is not repeat at the graph Start of each worm cycle This might be something in the gearbox that can be replaced Also this kind of error can come from a loose gear or coupler somewhere in the gearbox 2 The time is being altered on the system Some CCD Cameras mostly parallel port cameras will stop the clock because they are in kernel level This would cause the worm period to appear Shorter than it should 3 The worm period is not set correctly 4 If ther
45. driver E Mount Quick Setup Wizard Sp Part 1 lf your mount has an ASCOM driver then check Use ASCOM Driver and select Use ASCOM Driver the driver Do not connect through a hub like POTH which may cause timing problems in some cases If your mount does not have an ASCOM driver then ignore this step Eqmod Telescope Part 2 If you havent already configured the Edit Driver Settings COM port and other settings then click the Edit Driver Settings button and do so PEMPro knows the ASCOM driver name and so it automatically selects the driver If you have not connected before you should click Edit Driver Settings to select the COM port enter your Site information and to ensure that Pulse Guide Support is checked as shown below w ASCOM Setup After clicking OK you should click Finish in the Mount Wizard dialog After the Mount Wizard closes you should see your mount selected in the drop down list to the right of Connect Scope 2 PEMPro v2 5 SE File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash 0 o d O O O RA 0 00 1 00 i 3 00 4 00 5 00 RA Worm Phase Minutes lt All Cycles Visible gt Current Worm Worn Cycles RA Axis Graph Y Scale Total Time RA Na eerie Phase 8933 0 13 31 Li g Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine EQMOD Oron Altlas EQ G w Configure Scopes Mo
46. i r y Overlap Worm Cycles Ver No Gemini oe teat ee Sunc h Time No Gemini Mount Time Zone No Gemini Miia Zem No Gemini Goto Slew Aate No Gemini ii T DE Ho Gemini Manual Slew Rate Mo Gemini i 4 i f x maes visual Mode MA E u Ho Gemini Y J Mo Gemini Alarm Status Mo Gemini Ahia Ca Tia PER PEC Status PEG iki ren sa eatin a E Mo Gemini Guiding A ate Mo Gemini E re eee ee ee Alarm Status Fe Mo Gemini L Mo Gemini Unknown L Mo Gemini Z Ho Gemini a a 5 3 E ar i E i a hi Then confirm the correct setting using the hand pad Setup Communications Until you change the driver settings you may find that your hand pad settings to not stick between sessions Basic Steps to use PEMPro with your Gemini Level 4 Mount You must follow these basic steps to use PEMPro 1 Use the mount wizard to create an instance of a Gemini Level 4 mount in PEMPro You only need to do this step once 2 Each time before acquiring periodic error data you should run the Calibration Wizard 3 Acquire 5 6 worm cycles of periodic error data with PEC turned off 4 Create a PE curve 5 Adjust curve if needed and upload the curve directly to your Gemini 6 Check that PEC is reduced by turning PEC on and acquiring a couple worm cycles of data Each of these steps is explained in more detail below Setup Gemini mount with the Mount Wizard The fi
47. later To EQMOD loads a curve to the mount Any one of the 4 curve types can be uploaded From File loads a native EQMOD file To File saves a curve in native EQMOD PEC file format Any one of the 4 curve types can be saved 4 This section directs EQMOD to save or load a PEC file You can use this as a convenient alternative to saving loading a PEC within the EQMOD driver control dialog Graph Tab 2 DEMPro v2 5 Tool us File Peak to Peak PE 24 51 Arc secs PEMPro Peak to Peak PE 11 81 Arc secs Refinement Peak to Peak PE 0 00 Arc secs Arc Seconds 1 00 2 00 3 00 4 00 5 00 6 00 7 00 8 00 lt Al Gyles Visible RA Worm Phase Minutes RA Axis Graph Y Seale The Graph tab allows you to change the 23 07 appearance of each curve on the graph It also allows you to hide each of the graphs Setup Acquire Data Analyze Frequency Sp cain Graph Modify PE Curve PEC Quick Refinement PEC Table Data From Created PE Curve Visible Plots Plot Color Pen Weight Pen Style Mort M 2 9 soit v i BE oso i EQMOD PEC File MPEMPo W 1 QU soid v Load Refinement W 2 G G Solid v Fade Non Active Curves 10 _ Scope Connected Camera Not Connected i In the Graph tab you can change the visibility o
48. meridian The more away from the meridian the better but because of refraction try not to have the scope point below 20 degrees from the horizon Click Next Et PEMPro v2 0 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Move mount to East West for Altitude Measurement Step 7 of lf your mount has GOTO capabilities press the Slew button to automatically slew the scope the number of degrees _ If you are using a German Equatonal type mount choose the side of the mount that does not cause the mount to flip the telescope If your scope cannot slew then manually point the scope to the selected side of the meridian Altitude Measurements Meridian 30 Telescope m Altitude aa 52 27 RA 15h 45m y ie aes Dee 00 00 185 17 Slew Scope Siew e fa a E e s Sarc min Scope Connected Camera Connected 13 Measure Altitude Error a Click Start Measuring and wait for a couple minutes for the trend line to stabilize If PEMPro is having trouble locking onto the star move the scope to a new field of view using the buttons in the Slew Scope field at the bottom left of PEMPro You do not need to stop measuring while the repositioning the scope PEMPro will automatically try to re acquire a Star b Once the trend is established you can manually adjust the mount s altitude alignment based on the value displayed at the bottom of the graph see example picture b
49. mount 2 Whenever you start Acquiring PE data PEMPro automatically synchronizes to the mount This allows you the freedom to move the mount around without worry of forgetting to re synchronize Basic Steps to use PEMPro You must follow these basic steps to use PEMPro 1 Use the mount wizard to create an instance of an Astro Physics GTOCP3 mount in PEMPro You only need to do this step once 2 Each time before acquiring periodic error data you should run the Calibration Wizard 3 Acquire 5 6 worm cycles of periodic error data with PEC turned off 4 Create a PE curve 5 Adjust curve if needed and upload the curve directly to the mount 6 Check that PEC is reduced by turning PEC on and acquiring a couple worm cycles of data Each of these steps is explained in more detail below Creating a new mount instance with the Mount Wizard The first thing you must do is to create an instance of an Astro Physics mount in PEMPro The easiest way to do that is with the Mount Wizard Press F8 or go to the Wizards Menu and select Mount Wizard PEMPro v1 60 When the Mount Wizard Step 1 comes up enter a unique name for your mount When you exit the Mount Setup wizard the name you type will appear in drop down list box to the right of the Connect Scope button on PEMPro s setup tab PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 1 Description Enter a descriptive name or phrase for your telescope mou
50. number of teeth in the mount s worm gear f you dont know ask your manufacturer Common values are 180 8 minute worm period and 360 teeth 4 minute worn period Wom Period Eo i Wom Period mins secs A list of the number of teeth in many mounts and telescopes can be found here If you still cannot find your mount or telescope a quick internet search using the mount type and keywords teeth and worm gear might turn up the correct number If that fails check with the manufacturer of your mount or your mount s internet user group search on http www yahoogroups com If all of that fails please email us at pempro ccdware com The Graph Area The focal point in PEMPro is the graph It will provide you with a graphical display of the periodic error data as it is collected The vertical axis represents the data in either pixels or arc seconds depending on the setting X Y in arcseconds on the Acquire Data and Analyze tabs The horizontal axis is the mount s Right Ascension Worm Phase It s width is always equal to the worm period of the mount so data at a particular phase of the worm gear is easy to compare across multiple worm cycles After each complete cycle of the worm gear the color of the data points will change In the graph below drift is evident because each worm cycle migrates down a little in the graph i D O ay fi i lt I 0 00 00 2 00 00 3 00 00 4 00 00 RA Worm Phase Minutes Al C
51. or move the telescope you will need to resynchronize PEMPro if you want to acquire more PE data If you have High Accuracy Sync checked recommended then PEMPro will more accurately calculate the worm phase of the mount It does this by averaging the time at which the segment counter changes 15 times This takes about 35 seconds but it improves the accuracy of the resulting worm phase that PEMPro can use to about 0 1 seconds Without this option checked the worm phase is accurate to only about 1 second because the hand box updates its display at somewhat Irregular intervals Focus Depky updates every 1 0 Seconds ii Sync PE i pee eras 5 nchronize PEMPro t the RA PEG Seg counter 2a so that the PEC Curve can Sync PE PEC Of be Teas uploaded to the mount High Accuracy Syne 35 secs Shift key to hold Enter Mode and Goto rouge RE mode Gato HMR HHHH HH E aca wW y i 16 00 18 00 10 00 22 00 Saal Cald M 1 2 3 ites l RA PEC RA Pe a Segment Worm Cycles Samples 211 1 12 0 Het n ane Light el opes Mounts Meade Telescope Scroll Scroll E Help gt Move Scope st i Enable Scope Positron Updates Step 5 Synchronize PEMPro to your RCX400 LX400 ACF First you should erase the mount s PEC table To erase the mount s PE table click Clear PEC and then To Mount as
52. selected as the mount type you will get this dialog PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP a Enter Calculate Worm Period The Worm Period of your mount is probably the most important parameter that PEMPro uses Worn period can be directly calculated from the number of teeth in the mount s worm gear If you dont know ask your manufacturer Common values are 180 8 minute worm period and 360 teeth 4 minute worm period Wom Period Worm Period mins secs Coa Omas O ame 503e ETE TE A quick internet search using the mount type and keywords teeth and worm gear might turn up the correct number If that fails check with the manufacturer of your mount or your mount s internet user group search on http www yahoogroups com If all of that fails please email us at pempro ccdware com Mount Scope Configuration To setup your scope press the Configure Scopes Mounts button The dialog below will display as Shown here You can re size the window if you want to to see all the columns in the table et PemPro v2 0 Mount Scope Configuration Description New C Custom Commands Telescope Mount Type Other Mount Scope Description Test ASCOM Driver ScopeSim Telescope Advanced Contiguration Pulse Dynamics Pulse Padding me AQ GTESSWENESS a C Differe
53. tab in PEMPro to test integrated exposures The main disadvantage of using a webcam is that you typically need a bright star to collect data Finding a suitable bright star is often not easy Also most webcoms are only 8 bit meaning their maximum Signal Noise cannot be very high Lastly most webcams have very small CCDs So for much higher performance you can use PEMPro with the Meade DSI II and III cameras natively or most other CCD cameras when using MaximDL there is a 30 day free demo available AstroArt or CCDSoft Using a camera via MaximDL CCDSoft or AstroArt To use a camera with PEMPro using one of the above applications first setup the application to the camera first Then connect to the camera in Maxim CCDSoft or AstroArt Once you are sure the camera connects correctly then select the application in PEMPro and press the Connect Camera z RA Wo Ramis Gogh See x a 8933 BI MaximDL CCD Wom period secs CCDSoft V5 AstroArt Meade DSI Series Video Min Star Brightness Sync Worn Cycle Log and Images Dir C My Documents CCDWare PEMProV2 Scope Connected Camera Not Connected Using a Meade DSI I II or III camera Select Meade DSI Series and select your camera If you have multiple cameras select the camera you wish to use For more details on using the Meade DSI follow this link Click Connect Camera to connect Sr Setup Acquire Data Analyze Frequency Spectr
54. that image That will cause the last image to display Click the Same star there PEMPro will then show the compass directions directly on the window If you are having trouble finding the stars you can expand PEMPro full screen to get a better look If you still cannot find any stars then reposition the scope manually or use PEMPro s Star Finder feature If the stars move too far or not enough try adjusting Dec Move Distance arc min Also this step does not require much precision There are no precise calculations made from the clicks you make The only intent to roughly determine compass directions NOTE Although not shown in the pictures of Step 3 below there is now a FULL SCREEN button present on this step If you press that button the star images will display on the entire screen 2 PEMPro v2 0 TB Fie Settings Tools Wizards Help Determine North South East and West Step 3 of 93 This page determines the general compass directions on the CCD Three images are exposed PEMPro moves the scope between each image Once done click on the same star in each image and PEMPro will determine the Compass directions TIP Expand PEMPro full screen to better see the stars Step 3a Create Image Set Exposure secs 50 l Dec Move Distance p farc min Slew Settle Time secs 1 0 Step 3b Select same star in images Click on the same star in all 3 images next image displays automatically F you make a mistake try ag
55. the following advantages over PrecisionPEC from Software Bisque 1 PEMPro works with cameras that MaximDL CCDSoft V5 and AstroArt V3 V4 support PrecisionPEC will only work with cameras supported by CCDSoft V5 2 PEMPro works with TheSky6 and TheSky5 3 PEMPro dynamically recenters a subframe so it can track a star across the entire CCD chip instead of the smaller fixed tracking area that PrecisionPEC allows for 4 PEMPro can use any arbitrary rotation of your camera 5 PEMPro can use stars at any declination seeing may be significantly better overhead 6 Although PEMPro is already tuned for the harmonics normally found in Paramount ME and GT 1100S it can analyze and identify the exact harmonics using the frequency spectrum feature that cause periodic error 7 PEMPro can be used for other mounts should you already have one or ever purchase one Note Some pictures on this page show PEMPro v1 50 in the title however these pictures still apply to v1 60 and later Steps to program the Paramount Make sure you have defined the appropriate mount type in the Mount Scope Configuration dialog You can also use the Mount Setup Wizard Et PemPro 1 50 Mount Scope Configuration i E z ol x Description fer Mount Scope Description Mount Scope ME Telescope Mount Type T Use ASCOM Driver ASTOM Driver Paramount ME Meade Ls200 Except GPS 16 a Meade LX 200 GPS Advanced Configuration Pulse Dynamic Meade L200 1
56. to be very accuarate within maybe 5 degrees This will allow PEMPro to make moves to the corect part of the sky 3 lt Back Next Cancel Telescope Slew Scope Hi Sew yy stance Tarmin Scope Not Connected Camera Connected 6 Click Next to get to the Site Information page You can skip this page Click Next again to go to the Camera Information page a Enter the Pixel Scale of the camera arc seconds pixel b Enter the Camera Angle of the RA axis with respect to the horizontal axis of the camera You can easily figure this out by stopping the tracking on the scope and taking a 5 second exposure If the star trails are horizontal enter O in the Camera Angle field If the trails are vertical enter 90 in the Camera Angle field If the stars track on a diagonal rotate the camera until the stars track roughly horizontally or vertically and enter the respective angle PEMPro v2 0 Beta File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Basse Camera Information Step 2 of 9 In this step the image scale camera onentation and other camera control parameters are setup For this step and the next to work you should have the scope pointing to near 0 declination and approximately South North if you are in the Southem Hemisphere Pixel Scale Measure secs 50 is From Calibration Wizard Telescope Show Hour Ange Scope Not Connected Camera Connected
57. to go into Windows Control Panel and click the Customize button Then selected as the Decimal symbol and as the grouping symbol If that does not work try switching the region to Engish United States in both the regional and Advanced tabs If you are using Maxim 1 Check that you have the latest version of software available If you do not download the latest version from http www cyanogen com 2 Check that you can connect to your camera manually If you are using CCDSoft 1 Check that you have version 5 00 175 or later installed You can get the latest hot fix from here http www bisque com hotfixes 2 Check that you can connect to your camera manually If you are using AstroArt 1 Make sure you have AstroArt V3 Service Pack 3 or AstroArt V4 installed http www msb astroart com down_en htm 2 Make sure you have the latest driver for your CCD camera installed http www msb astroart com ccd_en htm 3 Make sure you have the latest CCD User Interface installed http www msb astroart com ccd_en htm 4 Check that you can connect to your camera manually Periodic error is PEMPro has the correction direction backwards If you doubled instead are playing back to the mount do NOT move the of being reduced mount Click menu Settings Settings Summary and invert the value in the Movement Direction setting Or if PEMPro has the ability to write a curve directly to your mount then you try
58. to improve them with mechanical adjustment or replacement of a defective part When the Integer Fundamentals checkbox is checked the frequencies are marked with a number on the top of the graph and an entry is placed for the first 100 fundamentals in the table in the Known Mount Fundamentals table 2 PEMPro v2 5 F Astrosave PemPro Tests Bruce Feagle EQMOD PE data PE 2 23Aug08_EQMOD bt EBK File Settings Tools Wizards Help Polar Align Wizard Star Finder Backlash Relative Magnitude Dad a Frequency Spectrum Curent Worm RA RA Ads Graph Y Scale Total Time Phase Wom Cycles Samples x a 61 00207 o207 o 5259 Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine Gemini L4 Show Known Mount Fundamentals C Known Mount Fundamentals hal l Period Description SRA ET P Ae e ar est nae i 239 34 Worm Pernod 1 119 67 Worn Penod 2 79 78 Worn Period 55 24 Wor Period 47 87 Worm Period 39 29 Worn Pernod Show Selected Frequency Jie in be da pt a l in ta NERS g Scope Not Connected Camera Not Connected If you check Known Mount Fundamentals and select your mount type then they will displayed and tagged with letters A B C etc 20 PEMPro v2 5 F Astrosave PemPro Tests Bruce Feagle EQMOD PE data PE 2 23Aug08_EQMOD bt nlx File Settings Tools Wirards Help PEC Polar Align Wizard Star Finder Backlash ly T
59. west of due South North you are inthe Southern Hemisphere Ifthe scope is connected the Declination and Right Ascension will update Adjust the position of the scope until the background of the Declination and Right Ascension text boxes turn green The position of the scope will be shown as a small red square After this is done eSEE Position Scope See A ZHN Side of Meridian __ Right Ascension ae oe West sl _toMerndian _ Hour Angle i FE 2e 00h 12m 53 0s as Declination Altitude k r io __52 28 10 0 3 185 17 54 0 Step 1 confirms that your telescope is in the optimal part of the sky The boxes on the left will be green when you are in the optimal part of the sky The red dot graphically shows where your telescope in the sky If you have a GOTO scope you can slew it to near the meridian using the Slew button Note Even if the declination is considerably different than O and the declination box shows red it is ok to use the star if you have checked Adjust Data for Declination in the Settings menu of PEMPro Click Next to continue 2 PEMPro v2 0 Beta PEMPro Setup Calibration Wizard Step 2 of 4 Establish Image Scale and Image Roll Angle This step will calculate the image scale and image roll angle If your mount is capable of stopping tracking remotely then press the Stop button manually then press the Take Image button After the image Is taken the Star Trail Viewer program
60. will load the image and you should click on the start and end of atleast 3 star trails Don tforgetto restart tracking after you are done Ifyou cannot remotely turn off tracking then turn it off from your mount s hand controller or remove power completely from the mount IfPEMPro for some reason cannot turn off sidereal tracking then you must manually stop sidereal motion now If you already know the roll angle you can enter it below The values will be saved from the lasttime this wizard was run Mount Tracking Take Image Nudge Scope Manual Settings ae LXE IL Jew maeeseetrosecpie Image Angie degres Danita 4 irene 0 00 5 arcmin v In step 2 mount tracking must be stopped manually via the mount s hand controller or by pressing Stop if your mount supports this feature the Stop button will be enabled in this case Once tracking is stopped press Take Image During the exposure all of the stars will trail because tracking is stopped When done the image will be displayed in the StarTrailViewer a separate application You will then click on the both ends of several star trails Since the sky moves at a very precise rate the length and angle of the trails allows the Image Scale and Image Angle to be calculated Note for Paramount Users The Start Stop buttons are both disabled for now because the Start Stop Tracking feature of TheSky s scripting interface seems to be unreliable To disable enable tracking use this menu option i
61. worm gear fundamentals giving you insight into where in the gear train the periodic errors are coming from No need to wait for steady skies PEMPro fits the periodic data to an optimized smoothed curve No need to be perfectly polar aligned PEMPro can subtract drift from the periodic curves Analyze data and compare curves Use PEMPro to evaluate the next mount you are planning to purchase Playback with the mount s PEC on to see how much improvement was actually made to the mount amp periodic error Allows further refinement of curves to optimize error correction even more Many advanced control features that allow you to tweak the correction Supported Mounts and Telescopes Note This list is not entirely complete Any mount that has a permanent PEC feature can be programmed with PEMPro by playing back the inverse of the periodic error data that is collected Astro Physics Celestron Model P be beri Playback upload a AET Gear seconds Utility AP1200GTO N A N A AP900GTO N A N A Yes N A AP600EGTO N A N A AP400GTO N A N A Yes N A Mach 1 GTO N A ee S ee S ee he ee ae ee ee CGE800 PECTool CGE925 PECTool CGE1100 PECTool CGE1400 All 180 Yes PECTool CGE Mount A 180 PECTool Requires Wedge 180 478 6893918 Yes Yes PECTool 180 478 6893918 Yes Yes PECTool 180 PECTool rr ee eee eee ee 180 N A 180 N A 180 N A SS ee ee ae ae Stock N A Gemini Level 4 N A eee a ae Stock N A Gemi
62. you synchronize the mount s PE cycle to PEMPro An overview of the procedure is as follows 1 You must start a Train PEC in your hand controller 2 PEMPro will send a move sequence to the mount 3 After PEC training is done PEMPro will download and analyze the data The mount s phase will be accurately determined so that the PEC curve that PEMPro creates can be directly loaded into the mount without having to go through a program mount stage This also has the advantage of using the data at any later time as the data is phased perfectly to the mount So to use this procedure please follow these steps Step 1 Make sure the LX200 GPS is selected as the mount type in PEMPro s Mount configuration dialog E PemPro 1 50 Mount Scope Configuration 7 x New Mount S cope Description MMount S cope Description L 200 GFS Telescope Mount Type x M Use ASCOM Driver ASCOM Driver Meade Telescope Meade LX200 GPS C Advanced Configuration Pulse Dynamics SAVE as Fulse bdodulo Pulse Padding msecs msecs Aqqressiveness Edit 10 East 0 1 00 Pulse Phase Different East West settings Delete msecs 2000 West 0 1 00 Close Basic Configuration Image Scale YYorm cycle fare sec pinel period secs 1 352 476 69 Seconds between Guider Rate Alavback Corrections 1 00 1 20 Mount S cope Table Description ASCOM Dri Scope Type
63. 20 E 30 00 35 92 0 01 15 0 040 0 019 10000 00 Image Seale 4rc Secs Pinel a1 0 01 39 156 0 01 18 0 012 0 006 10000 00 1 000 Scope Connected Camera Connected SubFrame 75 75 124 124 Tracking Stopped 9 If the Create PEC dialog does not come up switch to the Analyze tab and press Create PE Curve The dialog will look something like PEMPro Create PE Curve i Joj x File Graph Type Drift Fitting RMS Error 0 001 Periodic Error Hone Penodic Error 2 0 2 1 Graph of Data and Fitted PE Curve 227 ad a FFT Waveform Analysis Fundamental Freg cycles worm period Amplitude arc seconds 1 000 2 000 3 000 4 000 6 000 7000 Pe e ann Data Points R Asis Num Time Cyce Phase Centoid Fit alue Emor l 0 00 00 031 00 00 03 0 329 0 00 03 328 00 03 32 0 204 0 001 0 00 06 594 00 06 554 0 039 0 000 0 00 05 938 00 09 938 0 060 0 000 0 00 13 281 00 1 3 261 0 004 0 000 0 00 16 594 00 16 554 0 265 0 000 0 00 15 891 00 15 89 0 694 0 002 0 00 23 234 00 23 234 1 213 0 002 Initial Worm Fhase Image Roll degrees 1 18 77 0 00 Cancel Export Data mage Scale Worm Period secs Declination farc fec pinel 100 00 0 0 1 000 Create PE Protile and Close co Mm on Fe oo Pa 10 Press Create PE Profile and Close Back in the main form the Program Mount tab will display Press the Start Pl
64. 6 Classic F Basic Contiquration Image Scale YYorm cycle Fulse bdodulo fare sec pinel period secs msecs Paramount ME 4 Paramount 11005 Edit 0 500 149 59 10 Eag malatar Other ied Seconds between Pulse Phase Different Eashtvest settings Delete Guider Rate Alavback Corrections msecs E E s eung 10 So foo wet 0 i Close Mount Scope Table Description ASCOM Dri Scope Type Image Scale worm Period Pulse Modulo Puke Pad Aggressiveness Pulse Phas O AF1200 GTO Re POTH Tele AP 900 12 16 000 352 95 10 00 0 00 0 00 1 0071 00 2000 00 d L Losmandy Gemini Tel Losmandy 16 000 2393 34 60 00 0 000 000 1 00 7 00 0 00 Test ScopeSim Other 0 550 360 00 110 00 0 00 0 00 1 00 1 00 2000 00 C Simulator Simulator 3 090 331 40 10 00 0 00 0 00 1 00 7 00 0 00 L Celestron CGE Meade Ls 0 700 470 69 10 00 0 00 0 00 1 001 000 A Also critical is to make sure you have the Southern Hemisphere checkbox set appropriately on PEMPro s setup page Only check this checkbox if you are in the Southern Hemisphere Setup Acquire Data Analyze Program Mount Refine Connect Camera MaximDL CCD Use Autoguider Port to Move Scope Min Star Brightness 100 MaxStarBrightness 30000 Syne Index Syne Worm Cycle 600 Synchronizing PEMPro to the Paramount Important note when using TheSky 6 If you are using TheSky Version 6 you no longer nee
65. 7 Click Next several times until you reach step 5 Measure Azimuth Error Make sure your telescope is still pointing near the South Reposition it if necessary a Click Start Measuring and wait for a couple minutes for the trend line to stabilize If PEMPro is having trouble locking onto the star move the scope to a new field of view manually You do not need to stop measuring while you move the mount b Once the trend is established you can manually adjust the mount based on PEMPro s on the azimuth alignment error that displays at the bottom of the graph see example picture below Note that since the mount is not a GOTO the test to determine North and South could not be done so the direction of the adjustment is not known So initially assume the direction i e clockwise or counter clockwise is correct and make that adjustment to the mount If after making this adjustment the drift increases you will have to adjust the mount the opposite of what the direction says c Once you make an adjustment go back to step 7a above Continue making adjustments until the measured drift IS minimal 2 PEMPro v2 0 Beta Ee Fil Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Measure Azimuth Error Step Sof Azimuth Polar Alignment Start Measuring The drift value may be unstable for a couple minutes After it settles down note the alignment eror then go make an adjustment to the mount s AZ
66. Because of various reasons the very first curve you program into the mount may not result in a perfect result To produce a more accurate curve the original curve with the mount s PEC off is refined by adding to it the residual PE recorded by PEMPro with PEC on This procedure may be done a number of times to obtain the best possible accuracy For a case study which involves refining curves go here Focusing with the Hand box Window The hand box window has buttons to move the focuser in and out The Meade Hand Box Speed can be set in the Focus menu as shown to the right There are four mer speeds available Slow Medium Medium Fast and Fast There are also PE Cti 1 short cut keys CTRL 1 through CTRL 4 which allow you to change Medium MS Cilt Speed without directly accessing the menu Medium Fast Ctrl 3 Fast Ctrl 4 The focuser will start moving when you press the In or Out button and Sie Sten Foaia keep moving until you release the button However if Single Step SG m Focusing is checked then each press of the In or Out button will move Lia the focuser for about 1 100th of a second The timing should be accurate as the command uses the Meade FP command which specifies an exact High Accuracy Syne 35 secs number of milliseconds to move for the LX200GPS and number of encoder ticks to move for the RCX400 Editing PEC Cell Data You can also edit data in individual cells You can double click anywher
67. Bh 4 oF 6 Download PEMPro V2 from the CCDWare site or from the Check for Updates feature in PEMPro s Help Menu If the download is a ZIP file extract the contents into a temporary directory and double click the EXE file to start the installation The PEMPro V2 installer should check for the Microsoft Net Framework 2 0 but if not already ins wallicte you will need to install it At the time of this writing you can download it from here AAB15C5E04F5 amp displaylang en Install ASCOM 4 1 or later drivers You can download from here http www ascom Standards org downloads html Install PEMPro V2 Start PEMPro V2 PEMPro V2 When you run PEMProV2 for the first time and until you enter a license key you will be presented with the Trial dialog when PEMPro starts There is a 60 day trial available which allow you to evaluate PEMPro PEMPro v2 0 Tools Wirards Help Are Seconds E you have a V2 license key please cut and paste all 5 lines of your license in its entirety into the box below If you are upgrading from V1 you will also need your V1 license key Scope Not Connected Camera Not Connected Purchase License Clicking this button will open a browser window and take you to the CCDWare site where you can purchase PEMPro If the browser does not open you can manually type in the web page http www ccdware com CCDWare Support Forum pressing this button will take you to the CCDWare suppor
68. Build 48 e Fix Fixed bug in FITS processing introduced in Build 47 Exception converting string to Double String 16 8 unsigned int V2 00 June 23 2008 Build 47 e Fix Fixed several bugs in the Meade DSI camera images e Enhanced Feature Added more settings to the Meade DSI camera settings Meade DSI Settings DSI Pro 3 Gain Offset Readout Delay Use Custom Settings Readout Mode Single Exposure 24 Readout Speed High 1 Vdd Mode AlwaysOn 1 Flush Mode Continuous 0 Exposure Mode Normal zy Read Camera Settings e Fix Fixed bug in histogram display in Star Finder window v2 00 June 6 2008 Build 46 e New Feature Added the ability to set Meade DSI camera settings Gain Offset and Readout Delay Z PEMPro v2 0 File kauka Tools Wizards Help Edit ASCOM Driver Settings e New Feature Added Histogram Image stretching to Polar Align Wizard steps 2 and 3 so the image background and contrast can be adjusted to better see stars f PEMPro v2 0 PEC Polar Align Wizard Star Finder Backlash Camera Information Step Z of 5 ae PEMPro Pole Align Calibrate Click Start and End of any star In this step the image scale ci ee For this step to work best approximately South North if yi Camera Measured Image Properties Kel Pixel S
69. CTool v1 0 14 and greater PEMPro supplements the capabilities of PECTool with advanced features such as precision phase shifting curve smoothing inverting etc PEC Tool Meade PEC Tool PEMPro can directly upload to Meade mounts and does not require the use of the Meade PEC Tool TheSky Software Bisque TheSky version 5 or 6 PEMPro can create a PEC file that can be directly loaded into the MKS 3000 MKS 3500 and MKS 4000 controllers through TheSky You can find details on the exact procedure here Takahashi Unfortunately no Takahashi mounts have a permanent periodic error correction so it is not possible for PEMPro to work with them EQMOD Open Source EQMOD project has a seperate tool called PECPrep which can upload PEC files to the mounts PEMPro can directly upload to EQMOD support mounts and does not require the use of PECPrep PEMPro intgrates and simplifies the operation of PEC collection and uploading to EQMOD controlled mounts Version History V2 50 October 18 2008 Build 65 e Fixed slewing in Star Finder when using The Sky 6 Paramount ME V2 50 October 4 2008 Build 64 e Enhancements to Video Interface previously available separately e Fix Enhancement Corrected Meade Focuser commands used in Meade Handbox tool There are now 4 focus speeds instead of 3 one of which medium speed probably didn t work V2 50 September 27 2008 Build 63 beta Bug Fix fixed calibration bug in Vide
70. Contigure Scopes Mounts MasmOL CCO ze Autoguider Fort to Move Scope 4 Press Connect Scope in PEMpro You will see a connect command in the Simulator s table PEC Left PECRight O 00Secs 410 Corrected PE 11 084 Connect 5 In MaximDL or CCDSoft select Simulator as the camera type 6 Press Connect Camera in PEMPro 7 Iin PEMPro switch to the Acquire Data tab and press Start If an error that the star is too close to the edge appears then click Config Reset All and press Start again Setup Acquire Data Analyze 8 After a cycle has completed press Stop The graph may look like below If asked click OK to create the PEC curve E PEMPro 1 50 Acquired PE Data Loaded 31 Points _ o x File Settings Tools Wizards Help Arc Seconds PEC OFF CO 1 00 00 PER ON RA Worm Phase Minutes recorr Al Cycles Visible gt Current RA RA Asis Graph Scale Total Time Wom Phase Worm Cycles Samples x 4 00 1 36 37 01 33 1 Jl Setup Acquire Data Analyze Program Mount Refine Binning fi IM Always show last centroid T Adjust for Drit X Drift 0 020437 Subframe 50 x 50 M AY in arc seconds M Adust r for Drit Y Drift 0 000000 T ey 26 O01 22 924 0 01 02 1 502 0 698 10000 00 o 27 0 01 26 171 0 01 05 1 069 0 497 10000 00 z 28 0 01 29 421 0 01 08 0 625 0 290 10000 00 Be pie Whe clay econ 29 0 01 32 671 0 01 12 0 260 0 121 10000 00
71. Cycle Phase Centroid Fitas Enor gt l 0 00 00 000 00 00 000 0 00 03 031 00 03 031 0 00 06 015 00 06 015 0 00 03 000 00 05 000 0 00 17 2 000 00 1 2 000 0 00 15 015 00 15 015 0 00 18 000 00 18 000 0 00 21 031 00 21 031 a aly T Initial Worm Phaze Image Rall degrees 1 59 33 0 00 M gael Periods Tass Export Data mage Scale Worm Period secs Declination fanc sec piel 146 90 0 00 0 670 Create Paramount PEC File Co d 07 on Fe to Pa 5 Press Create Paramount PEC File to create the file You will be asked if you need to invert the data This depends on your camera configuration recommend you do not invert the data unless you know it needs to be inverted and stay in this dialog until you have a chance to confirm that the curve reduced PEC instead of making it worse 6 Now in TheSky 5 6 go to Telescope Options More Settings and select the Periodic Error Correction tab More Settings for Paramount ME status Table to displ ore F Index 584 value able splay Flash Polynomial order Recorded w step 3 Upload tyg Step 9 Polynomial Sine curve 1 6 arcseconds Apply PEC correction Recorded tabe Offset 0 8 arcseconds ro Flash Copy Help 7 Hit Zero Flash Any PEC curve will be replaced by a straight line 8 Hit Paste The PemPro generated curve will be plotted and the Curve Fit and Upload buttons will be enabled 9 Hit the
72. E you should select a Pulse Modulo that is close to a multiple of 16 7 TIP You can use the Pulse Test tool to calculate a good minimum value for Pulse Modulo Pulse Padding This adds a fixed number of milliseconds to duration of a pulse in addition to any pulse sent to the mount Normally this should be 0 however there is a theory that the Meade LX 2006 may need some padding for the pulse to register properly The range is 0 500 milliseconds Pulse Phase This allows you to advance or delay when the pulses are sent to the mount This allows you to fine tune the timing of the pulses representing the correction curve The range is 5000 to 5000 milliseconds Normally leave this at zero but you can try setting a small negative value to see if that better corrects the mount periodic error Aggressiveness This value will be multiplied by the calculated move duration to create an actual duration Normally this will be set to 1 00 but if your periodic error is being under corrected you can try increasing this value and retrying The range is 0 01 to 5 00 PE Fundamental Frequencies This is the list of fundamental frequencies defined for this mount The units are 1 worm period In almost all mounts are a number of spinning gears that ultimately allow the mount to track at nearly perfect sidereal rate Because there are always very slight errors in the manufacturing process every one of those gears is not perfectly round They are shaped more
73. EC Quick Refinement PEC Table Data From Created PE Curve From EQMOD To EQMOD Ach ve Curve PEMPro Created Curve v W Upload changes immediately to mount Enable PEC Drawing with Mouse Curve Phase Adjustment PhaseDelta 7 r Motor Ticks vij Reverse Total Phase Adjustment Scale Curve Motor Ticks Secs EQMOD PEC File Load Save Scale Valve 093 5 033 E Scale Curve when clicked will scale the curve by the value in Scale Value This might be useful if you collected PEC at the wrong or unknown image scale and need to scale it to correct for that Clear Clears the entire active curve Smooth Smooths the curve Can be pressed multiple times for additional smoothing Here is a curve created by EQMOD s PECPrep before smoothing BER 2 PEMPro v2 5 Elx File Settings Tools Wizards Help Polar Align Wizard Star Finder Backlash File Peak to Peak PE 87 32 Arc secs w Tv fom Q oO lt 2 00 3 00 00 RA Worm Phase Minutes Total Time Motor Index Wom Cycles vio a 0 14 30 30645 2 1351 PE Curve From Created PE Curve Active Curve Phase Adjustment Last Loaded File v Fom EQWOD Te EOMOD F Upload changes immediately to mount Delta C Erabie PEC Drawing wih Mouse Maia ToS i Total Phase Adjustment EQMOD PEC File Scale Curve Motor Ticks Secs Sca Value ag After clicking Smooth 3 times 2 PEMPr
74. Fitting l RMS E Periodic Error Quadratic E min 24 Secs vi ca 1012 Graph of Data and Fitted PE Curve Periodic Error r e99 11 271 11 271 ajal FFT Waveform Analysis Fundamental Freg cycles worm period Amplitude arc seconds Phase degrees 1 000 2 000 3 000 4 000 5 000 6 000 P non Data Points Ad Anis Hi 0 00 00 000 00 00 000 0 00 03 014 00 03 014 0 00 05 996 00 05 9938 0 00 08 502 00 06 802 0 00 11 717 00 11 717 0 00 14 621 00 14 61 0 00 17 615 00 17 615 0 00 20 579 00 20 579 Oo 07 N e Oo ha Initial Yvorm Phase Image Roll degrees 0 47 22 0 00 Cancel Export Data Image Scale Worm Period secs Declination farc sec pinel 302 0F 0 00 0 550 Create PE Protile and Close Most of the calculations and fit optimizations are hidden and occur automatically This dialog is separated into three sections The top is the graph area which will display the PE curve and data points Note that there is a scroll bar below the graph which allows you to scroll across the data to see how it matches the all of the PE data you are analyzing There are also buttons on the left and right of the scroll bar that allow you to Jump exactly one worm period ahead or behind unless you have reached the beginning or end of the data Also aS you move the mouse over the graph the current relative time of the data X Axis and the arc seconds Y axis are displayed above the graph Gra
75. IMUTH Wait a couple more minutes and male further adjustments as needed Drift Scale 50 00 C Show adjustment in arc seconds hall arc secs z Od l EAL Lo HE Telescope Slew Scope Siew cy Distance oF s Tarcmin Scope Connected Camera Connected 8 Click Next until you reach step 7 see picture below a Point the scope to the East or West about 30 60 degrees from the meridian The more away from the meridian the better but because of refraction try not to point below 20 degrees from the horizon b If you chose to point the scope to the West make sure Measure West of Meridian is checked otherwise select Measure East of Meridian c Guess the number of degrees from the meridian It doesn t have to be precise d Click Next PEMPro v2 0 Beta Fie Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Move mount to East West for Altitude Measurement Step 7 of 9 lf your mount has GOTO capabilites press the Slew button to automatically slew the scope the number of degrees lf you are using a German Equatorial type mount choose the side of the mount that does not cause the mount to flip the telescope lf your scope cannot slew then manually point the scope to the selected side of the meridian Altitude Measurements Degrees Relative to Meridian Telescope Show Hour Angle aC Slew Scope H Sew Destence E W z larc snin Scope
76. If you have some sort of fimage mena eh sah fs linkingo feature in your planetarium program then use it to get the pixel fare secJpinell period secs scale 76 000 36295 Seconds between If you do not have access to a program with image linking there are Guider Rate Playback Corrections roan a hin a various programs that you can use to calculate the image scale given 100 Sf 10 the focal length of your scope and the size of the pixels in your CCD camera NOTE The approximate formula for computing pixel scale is 206 26 pixel size micron telescope focal length mm One thing to remember is that the manufacturer claimed focal length is often Significantly different than actual Worm Cycle Period secs This is the primary period in seconds of your mountG worm gear As with Unbinned Image Scale it is very important to set this accurately If you select an entry besides Other in the Telescope Mount Type then this field is automatically filled in If you are unsure of your mount worm cycle contact the manufacturer or post a message to the CcdWare Yahoo list http groups yahoo com group CCDW are Guider Rate This must match the rate that the mount will move in RA in units of sidereal rate In most cases there is no way for PEMPro to get this from the mount so you must be sure that it is set correctly In most cases the guide rate is 1 00x sidereal Seconds between Playback Corrections If you have an Astro Physic
77. If you haven t done so already you should use the Mount Wizard to create a new instance of the LX200 GPS R ACF mount Make sure Southern Hemisphere is checked on the Setup page if you are located south of the equator Step 2 Locate a 5 7th magnitude star near the meridian and O declination Step 3 Connect to your mount camera control program and use PEMPro s Calibration Wizard to set up all of PEMPro s important parameters Use ASCOM as the movement method You should always run the Calibration Wizard at least once if you are going to acquire data You will also want to run it again if you change the camera angle telescope image train etc Step 4 After completing the calibration wizard press the Hand Box button 00322 s556 0o o0 Acquire Data Analyze Program Mount Refine Lx 200 GPS Disconnect Scope Meade Telescope Contigure Stopes Mounts Connect Camera MaximDL CCD M Use Autoguider Port to Move Scope Worm period secs 1426 07 Southern Hemisphere Min Star Brightness 100 Max Star Brightness 30000 Syne Index Syne Worm Cycle 600 Log and Images Dir F Astrosave PemPro Tests ah This will bring up the LX200 GPS hand box window shown below From this dialog box you can remotely control the telescope The display at the top of the dialog shows what is actually being shown on the Hand Box Normally this is updated about once every 5 seconds but will be updated immediately
78. Known Mount Fundamentals L Known Mount Fundamentals Fabel Period Description A A 478 70 Wom Drive a B 366 60 Transfer Gear C 174 00 Wom bearing ball E 172 00 Stepper Gear 10 20 Stepper Transter Drive gear teeth 472 69 Wor Period 1 Show selected Frequency Scope Connected Camera Not Connected To load an existing file select File gt Load File for Analysis Et PEMPro v2 5 F Astrosave Pe Settings Tools Wizards Help Load File for Analysis Load Existing Curve Create a PE Curve Export PE Data Capture Form to JPEG Once in the Open file dialog select the file type to load and click Open Mame size Type Date Modified PE 3 23Aug08_EQMOD txt 58KB TextDocument 8 24 2008 2 00 AM E PE 2 23Aug08_FQMOD txt 1568 KE Text Document 8 24 2008 1 28 AM Henne PE 2 23Aug08_ EQMOD td v My Network Files of type PemPro Loa files t KA PemPro Log files be EQMOD PE Recorder Files tt CCOSoft Log Files log ted Camera Not Connected After you have loaded the file it should display on the graph Click the Frequency Spectrum tab et PEMPro v2 5 F Astrosave PemPro Tests Bruce Feagle EQMOD PE data PE 2 2 3Aug08_FOQMOD txt Slee File Settings Tools Wizards Help Polar Align Wizard Star Finder Backlash After loading the file click the Frequency Spectrum tab eet as i PP hase Minutes All Cycles Visible gt lt eee ee Curent Worm RA RA Ads Graph Y Scale Total Tim
79. M driver versions required to match those on the ASCOM downloads page except Celestron driver which still seems to be an old version Put Gemini in Terestrial mode when stopping the mount for calibration in the Polar Alignment Wizard and in Backlash Exerciser Fixed problen with international date and numeric formats Added checkbox for Dark Subtract to disable it for cameras that do not have shutters Added additional controls for maximum duration and starting Binning in Polar Alignment Wizard Added additional control for single shot color cameras used under MaximDL Register StarTrailviewer exe so that Calibration Wizard does not fail The last calculated compass directions in the Polar Alignment Wizard are now saved and restored between application runs V2 00 April 30 2007 Build 26 Beta Included missing DLLs files for video application Included first rev of Help file still needs more work Fix problem creating CCDSoft Dark Frame in step 3 of the Polar alignment Wizard Set default culture to USA so users in foreign countries do not have to change regional settings Improved contrast of images in Polar Alignment Wizard backlash Exerciser and Star Finder Improved star detection and tracking reliability in Polar Alignment Wizard V2 00 April 27 2007 Build 25 Beta e Fixed bug in registration mechanism V2 00 April 27 2007 Build 24 Beta e Initial beta release Installation and Preparation 1 2
80. M sse o o Setup Acquire Data Analyze Program Mount Refine Lx 200 GPS Disconnect Scope Meade Telescope Conigure Scopes Mounts Connect Camera MaximDL CCD Use Autoguider Port to Move Scope Worm period secs 1436 07 Southern Hemisphere Min Star Brightness 100 Max Star Brightness 30000 Syme Index Syne Worm Cycle 600 Log and Images Dir F Astrosave PemPro Tests a This will bring up the Meade Hand Box window shown below From this dialog box you can remotely control the telescope The display at the top of the dialog shows what is actually being shown on the Hand Box Normally this is updated about once every 5 seconds but will be updated immediately after you press any button It updates faster 0 2 seconds if the RA Segment is being shown Pressing any of the buttons outside of the Quick access area will emulate a button press on the Hand Box Also note that at the bottom is the telescope s current Declination Right Ascension and Hour Angle The hour angle is especially useful because it tells how far the mount is pointing from the meridian The meridian runs overhead from north to south Objects rise in the east transit the meridian and set in the west An object on the celestial equator declination 0 takes 12 hours to cross the sky from east to west Hour angle HA is defined as the length of time since an object transited crossed the meridian So if HA is neg
81. Not Connected Camera Connected 9 Measure Altitude Error a Click Start Measuring and wait for a couple minutes for the trend line to stabilize If PEMPro is having trouble locking onto the star move the scope to a new field of view manually You do not need to stop measuring while you move the mount b Once the trend is established you can manually adjust the mount s altitude alignment based on the value displayed at the bottom of the graph see example picture below Note that since the mount is not a GOTO the test to determine North and South could not be done so the direction of the altitude adjustment is not known So Initially assume the direction i e raise or lower is correct and make that adjustment to the mount If after making this adjustment the drift increases you will have to adjust the mount the opposite of what the direction Says c Once you make an adjustment go back to step 9a above Continue making adjustments until the measured drift IS minimal d Click Next to continue 2 PEMPro v2 0 Beta File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Measure Altitude Error 39 a Oo f amp Step 8 of 9 fle N Altitude Polar Alignment Drift fmin F Siew other fas Stop Measuring The dift value may be unstable for a couple minutes After it settles down note the alignment emor then go make an adjustment to the mounts ALTITUDE Wait a couple more minutes and
82. OFFSET SCALE CURVE Then clicking to the RCX 400 tab can now load the curve into the graph there by pressing From Created PE Curve which is marked in the picture below PEMPro v1 50 RPE 3575 ARES e Arc Seconds 0 00 RA Worm Phase Min as Total Time rhea Worm Cycles TEA EZI EE E PE Curve From Mount From File To Mount To File Once again Greg Sellek loaded this curve and provided another raw data file from which came this result Peak to Peak PE 5 78 Arc secs RMS 1 37 Arc secs Peak to Peak PE 35 79 Arc secs RMS 8 75 Arc secs Refined Curve uploaded to the mount i Measured PE of refined curve Now this is a really good result Less than 6 arc seconds total of periodic error All that is remaining is a residual 18th order fundamental which could be further reduced with one more refinement Why did the first curve only reduce Periodic Error by 50 The mediocre performance of the first curve puzzled me until looked at the original data and the refined curve on the same graph Peak to Peak PE 30 49 Arc secs RMS 7 41 Arc secs Peak to Peak PE 35 79 Arc secs RMS 8 75 Arc secs Refined Curve seems phase shifted Initial Curre The refined curve seems phase shifted about 10 seconds and is slightly scaled compared to the Original data Greg Sellek collected with PEC off If this is true if the original RCX data that Greg used can be salvaged if it
83. PE Curve ASCOM DRIVER V1 14g Den From EQMOD To EQMOD EQMOD PE Data Last Loaded File Nan Poe Moorde Aes 07 32 947 47437 29 862 07 31 610 47297 31 093 EGMOD PEC Fie 07 30 951 47228 32 381 Load 07 29 624 47089 33 305 07 28 946 47018 33 897 07 27 628 46880 34 014 7 28 97N 4F211 22 RAN Curve Scope Connected Camera Connected This allows you to see the raw data and motor indices in the curve You can select which curve s data to view in the Curve combo box field Component Stepper Gear Stepper Gear Tooth Stepper Microstep Transfer Gear Transfer Gear Tooth Worm Bearing Worm Drive Gear Worm Drive Gear Tooth Worm Gear Component Stepper Gear Stepper Gear Tooth Stepper Microstep Transfer Gear Transfer Gear Tooth Worm Bearing Worm Drive Gear Worm Drive Gear Tooth Worm Gear EQ6 Atlas EQ G information Special thanks goes to Chris Shillito for publishing the following data Description Gear attached to the stepper Shaft drives the transfer gear Contact period of each tooth Period stepper stays as each microstep position Gear between stepper and worm drive Contact period of each tooth Period of rotation of each ball within the bearing Mounted on Worm shaft Contact period of each tooth Rotates once per Sidereal day HEQ5 Sirius EQ G information Special thanks goes to Chris Shillito for publishing t
84. PEC before Acquiring Disable PEC before Acquiring A log file with the name format PEMPro Date and Time Txt is created in the Log directory defined on the Setup page Each data point will be plotted and each cycle of the worm gear will be plotted in a different color Note that one of the axes is RA and the other is Dec so if you are unsure which is which you may want to try switching the Axis plotted with the RA Axis combo box If the plot is nearly linear then you are probably looking at the declination axis You can also change the scale of the graph by entering a number in the Graph Y Scale edit box IY Always show last centroid Adjust fors Drift Drift 0 00 IW Y in arc seconds IY Adjust fory Drift Drift 0 00 Always show last centroid If checked will force the table to scroll to the last data observation X Y in arc seconds If checked will multiply the X Y centroids by the Image scale you entered in the setup page It will also repaint the graph Adjust X for X Drift If checked will recalculate the X centroids accounting for the 50 point moving average of the trend of the star movement in the X axis This feature does not alter the raw data in any way just what is displayed in the graph and in the table Adjust Y for Y Drift If checked will recalculate the Y centroids accounting for the 50 point moving average of the trend of the star movement in the Y axis This feature does not alter the raw dat
85. Procedure Non Goto mounts Note The procedure below sometimes indicates to point the telescope to the South This applies only to users in the Northern Hemisphere If you are in the Southern Hemisphere please substitute each occurrence of South with North 1 Select the Setup tab of the PEC page the initial page displayed when PEMPro starts 2 Do the following a Select the camera control program you wish to use in the drop down list box to the right of the Connect Camera button b It is best if you already have the camera control program active and the camera connected to it c Focus the telescope on a star d Make sure that the Min Star Brightness and Max Star Brightness are set to reasonable values e g 1000 30000 for CCD or 100 255 for Video 3 In PEMPro connect to the camera control program by pressing Connect Camera When connected the button will change to green and will say Disconnect Camera f PEMPro v2 0 Beta PEC Polar Align Wizard Star Finder Backlash 5 0 Arc Seconds 5 0 2 00 RA Worm Phase Minutes Total Time Disconnect Camera MaximDL CCD C Use Autoguider Port to Move Scope Worm period secs C Southem Hemisphere Min Siar Btines Max Star Bishiness Syne Worm Cycle Log and Images Dir F Source PEMPro V2 PEMPro V2 PEMPro V2 bin Debug 4 Select the Polar Align Wizard tab and press Next to start the wizard 2 PEMPro v2 0 Beta
86. R Aas Graph Scale Total Time Phase Worm Cycles Samples x 12 50 a 0 46 56 03 03 1 114 RA Worm Phase Minutes Setup Acquire Data Analyze Program Mount Refine Stop Binning fi M Always show last centroid Adjust X for X Drift X Drift 0 000446 Adjust Y for Y Drift Y Drit 0 000120 Click Stop when you are done collecting data If you have Ask for Filename and Comments when Acquiring Data checked in the Settings menu you will have a final opportunity to add comments to the file or delete the log file and start over If you don t delete the file you will be prompted to go directly into the create curve dialog P PEMPro v1 50 PemPro 2006 02 12 175951 bct ioj x File Settings Tools Wizards Help 5 0 0 07 a oC 3 SH s im X l Would you like to immediately analyze and create a PE Curve 50 If you select No you can do this later by dicking Create PE Curve on the analyze tab Tve 10 0 Jsa 0 00 J 2 00 PEC ON RA Worm Phase Minutes _ lt All Cycles Visible gt ene RA RA xis Graph Y Scale Total Time Phase Worm Cycles Samples h Click Yes to continue Create a PE Curve You can create a PE correction curve immediately after acquiring data or use the log file created in a previous session PEMPro places all log files in the directory specified in the Logs and Images Dir field on the Setup tab of PEMP
87. a Not Connected 6 On the Site Information page enter your latitude longitude elevation and approximate temperature These values are used to later calculate refraction as well as local sidereal time and the scope s approximate altitude azimuth Note that the longitude latitude will effect the telescope position in the graph on the bottom of the page The Small red square is the location in the sky that the telescope is currently pointing After entering the above values you can click the Slew button to slew the scope to an ideal sky position It is recommended that you you chose to move West of the meridian so that you do not have to deal with possible side effects of crossing the meridian weight shifting in the scope mount However if the West is obscured you can choose to slew to the East You may then want to increase the distance from the meridian The scope tracks about one degree every 4 minutes so 5 degrees is usually more than enough to do the initial measurement and adjustments You should choose a declination as close as possiblle to O declination The closer to 0 degrees that you can get the more accurate the next step will be able to determine camera angle and pixel scale Click Next to go to the next step 2 PEMPro v2 0 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Site Information Step 1 of 3 Please enter your approximate Latitude Longitude Elevation and Temperature T
88. a in any way just what is displayed in the graph and in the table User Comments PEMPro allows you to alter the default filename and add comments to the log file automatically created when doing an Acquire Data This feature can be enabled disabled from the Settings Menu When off PEMPro automatically creates the files with the default Filename format e g PEMPro Date Time Txt in the Images and Logs directory When on when you start an Acquire Data a Dialog pops up with an option to change the filename and add a comment When the dialog opens the default Time Date encoded filename is automatically displayed so that you can keep that if you want PEMPro Acquire Data Filename and Comments l O x Log Filename Pem Pro 2005 09 10 143515 bd Comments This is a comment entered before Acquiring data When the Acquire Data is stopped another dialog appears asking you to add any final comments If you want to discard the log file at that time there is a button to do that PEMPro Acquire Data Final Comments Ioj x Final Comments This is a final comment Delete this Log File The comments can be read in the file or are displayed as a tool tip when you mouse over the file details in the Analyze tab Here is flash tutorial to show you how this all works http www siriusimaging com Flash PEMPro LogTitlingAndComments htm Analyze If you click on the Analyze page you will be able to analyze the
89. a it is often difficult to do that initial synch on a star because it doesn t land in the camera s field of view When that happens you may find that the Star Finder comes in handy It will do a spiral search around starting from the current position and build a large bitmap directly on the star finder tab g mm j r i ss iC Lae iat fi Eo PE il E Y o a File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash 7 ass ae e en a k Spiral Field Tsleecerne srar mirs Find pa g i ECSC omMera Jra FING tal i Ld H E ae Binning 2 Dark lt RA O h 46m 35S p sl Subtract Width 00 Overap 12 s Fercent Dec 00 00 00 PueiSeaie stosecs 9903 Height Duration 2 Seconds 0 64 a one a Snapshot f 1 oe Move Angie Frente Use Scale E bw wets From Main M a 1 9 yt Page Via A Images 100 _ Ni Seope Connected Camera Connected To get started connect your camera and telescope on PEMPro s Setup tab Then click on the Star Finder tab near the top of PEMPro This will bring you to a screen that looks like the above picture The first thing you should do is to setup the camera Binning If your camera takes a long time to download and it supports binning you can set it to greater than 1 Binning reduces the size of the image and also the time it takes to download Binning 2 will
90. acklash RunoutTime specifies the amount of time the mount will be moved in the declination axis before measurement starts This allows for any backlash to be removed before measurements start e Calibration Star If you select Auto select the default the brightest star will automatically be selected If more than one star is available you may want to select a star that you know won t fall off the edge of the CCD To do that select Manually Select Click OK to continue with the calibration or Cancel to abort the calibration If you selected Manually Select a star when you close the dialog you will see a small dialog in the upper right amp Select Star to Track Sel k o X Please click on the star you would like to track Press OK or CANCEL when done Cancel PEMPro Calibrate Find Star Track Eam Move 7 Tracking radius G a S Tracking Enabled 135 B 76 366 8 aj When you click a star the tracking box will appear and in the lower left you will see some tracking information X Y Centroid background and average star level Please click on the star you would like to track Press OK or CANCEL when done Click OK to start calibration or Cancel to abort Tracking Rectangle Top Row Star X Centroid Star Y Centroid Bottom Row Background Average Star Average PEMPro Calibrate Find Star Track Aro sec pxe Move x si Image 1 B Tracking radius Scale Degrees Cursor Pos Tracking Enabled ange
91. ain If there are no visible stars move the scope then try again Telescope Altitude C Show Hour Angle p sa 4 52 05 RA 15h 45m 7 E Aaimuth Dee 00 00 I 190 46 Slew Scope l Tew 5ammin a pne E w Scope Connected Camera Connected After determining compass directions 2 PEMPro v2 0 lx Fie Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Determine North South East and West FS es Step oof d This page determines the general compass directions on the CCD Three images are exposed PEMPro moves the scope between each image Once done click on the same star in each image and PEMPro will determine the Compass directions TIP Expand PEMPro full screen to better see the stars Step Ja Create Image Set Exposure secs Dec Move Distance farc min Slew Settle Time secs 1 0 Step 2b Select same star in images Click on the same star in all 3 images next image displays automatically ff you make a mistake try again If there are no visible stars move the scope then try again Image 2 Image 3 Telescope Altitude eon E 52 07 Ra 15h 45m i k Azimuth Dee 00 00 l E 19021 Slew Scope Siew E l Dista nce 3 arcmin Scope Connected Camera Connected Click Next to continue 9 Click the Slew button to slew the scope to near the Meridian Click Next to continue Et PEMPro v2 0 E Ef File Settings Too
92. and End of any star trail Close this form when dorh E 3 n To Proceed close the form and click Next to go to the next step unless you want to adjust the advanced settings When closing the form the scope will slew back to its starting RA Dec Advanced Camera Settings Advanced Settings Min Star Brightness ET Max Star Brightness 0M Ff ie finding star 3 ei Taira Rest el Dark Subtract Images E Colorte Mone MaximDL 4 58 Only Fixed Exposure Duration Max Exposure secs This is the maximum exposure that the star searching mechanism will attempt A good starting value is 5 seconds Min Star Brightness PEMPro will adjust the exposure time to be in the range of this value and Max Star Brightness Max Star Brightness PEMPro will adjust the exposure time to be in the range of this value and Min Star Brightness Note Two separate sets of Min Max star brightness are stored for your convenience One set is for a CCD camera and another set for when the Video Interface is selected on the PEC Setup page When the Video Interface is selected the range is initially set to 100 255 When Maxim AstroArt CCDSoft is selected the range is 1000 30000 Binning when finding star To reduce download times PEMPro can bin full frame images You should only select a binning value that will work with your camera If you select an invalid value then the star finding mechanism will stop with an error Tracking Rect pi
93. ar Finder Backlash Camera Information 3ra m ee a Sep oF J In this step the image scale camera onentation and other camera control parameters are setup For this step to work best you should have the scope pointing to near 0 declination and approximately South North if you are in the Southem Hemisphere Press Measure Now to begin Camera Measured Image Properties Advanced Settings AT Sec Pwal Pixel Scale p47 Max Exposure secs 20 J rl Camera Angle we g Min Star Brightness E 1000 E Measure Time 150 2 Max Star Brightness 30000 secs L i Binning when finding star M era Tracking Rect pixels 32 Now Dark Subtract Images C Colorto Mono MaxdmDL 4 58 Only C Fixed Exposure Duration Cer Telescope Altitude C Show Hour Angle p 7 da 52 17 27 RA 12h 37m 25s fe Azimuth Dec 00 00 00 i 188 22 56 Slew Scope Sew A s TS arc deg vl Scope Connected Camera Connected After the exposure completes a new window will open with hopefully a number of star trails Just click the star and end of one trail Then close the window If the trails are too long or too short you can adjust the time that tracking is stopped in the Measure secs field If you do that just press Measure Now again Here is an example of a trail before being marked And again after each end of the trail is clicked Ek 2 PEMPro Pole Align Calibrate Click Start
94. arately and have one of them installed MaximDL CCDSoft and AstroArt IMPORTANT If you are having problems connecting to the camera make Sure you can connect manually first that is without using PEMPro Use Autoguider Port If you are using CCDSoft V5 or MaximDL Version 4 or later and your camera and mount have auto guider ports you don absolutely need to use the ASCOM driver for the scope if you check this option If you use this option with CCDSoft V5 you should calibrate your autoguider at 0 degrees declination before acquiring data and programming the PE of your mount Please be sure that you are using the latest version of CCDSoft V5 by checking http www bisque com hotfixes Southern Hemisphere It is important to check this box if you are located in the Southern Hemisphere Some mounts require different information when they are located in the Southern Hemisphere Worm Period This is the scope mountG worm period in seconds This usually will be set in the Configure Scopes Mounts dialog but if you change it here it will be remembered and associated with the currently selected scope You can press the calculator icon to the right of the worm period to bring up the Worm Period Calculator You only will need to use the Worm Period calculator if your mount does not have a built in definition or you don t know the exact worm period of your mount To use the calculator enter the number of teeth in your mount s worm gear If you don
95. are automatically determined from the mount PEMPro automatically re synchronizes itself before starting to acquire PEC data you never have to worry about synchronizing This allows you the freedom to move the mount around without worry of forgetting to re synchronize You may be able to use PEMPro s Refine curves procedure to improve PEC further PEMPro v1 60 File Settings Tools Wizards Help Peak to Peak PE 38 03 Arc secs Arc Seconds RA Worm Phase Minutes E All Cycles Visible Current Worm RA Axis Graph Scale Total Time aE Setup Acquire Data Analyze Program Mount Refine Celestron PE Curve Phase Firmware Rew 5 6 arr From Created FE Cume 0 0 Celestron PE Data seek Index Jeem L From File Invert J SEA Smooth Scale 10 Basic Steps to use PEMPro You must follow these basic steps to use PEMPro 1 Use the Mount Wizard to create an instance of a Celestron mount in PEMPro You only need to do this step once 2 Once each session before acquiring periodic error data you should run the Calibration Wizard on a star near 0 declination 3 Acquire 5 6 worm cycles of periodic error data with PEC turned off 4 Create a PE curve 5 Upload the curve directly to the mount 6 Check that PEC is reduced by turning PEC on and acquiring a couple worm cycles of data Each of these steps is explained in more detail below 1 Creating a new mount instance with the Mou
96. art Acquiring PE data PEMPro automatically synchronizes to the mount This allows you the freedom to move the mount around without worry of forgetting to re synchronize 3 Hovering over the PEC status text box will display a tool tip of the entire PEC status byte Clicking the text box will update the PEC status 4 On the Gemini tab the firmware version and guide rate are displayed Note Some pictures on this page show PEMPro v1 50 in the title however these pictures still apply to v1 70 and later IMPORTANT You must setup to use JNow instead of J2000 epoch for telescope moves slews to work as expected It is very important to make sure that both the ASCOM driver and the mount hand paddle are set for J Now not J 2000 So to edit the Gemini ASCOM settings in PEMPro click Settings gt Edit ASCOM Driver Settings Ee PEMPro v2 5 Tools Wizards Help Edit ASCOM Driver Settings Settings Summary y De Rotate Data Adjust Data for Declination Calibrate Images when Acquiring Data w Disconnect Scope on Disconnect Disconnect Camera on Disconnect Disable Fundamental Auto Find Once you are in the driver go into the Advanced Setup page and uncheck Gemini Calculates Precession from J2000 and Gemini Calculates Refraction See picture below Keep Main Form on Top w Restore last position when starting Ask for Filename and Comments when Acquiring Data Night Screen Mode
97. asuring the Altitude or Azimuth alignment error e Connect to the camera control program by pressing Connect Camera When connected the button will change to green and will say Disconnect Camera 3 Setup Telescope a Select your telescope in the drop down list box to the right of the Connect Camera button If this is a new telescope use the Mount Wizard in PEMPro s Wizards menu to define your mount scope b Connect to the telescope by pressing Connect Scope When connected the button will change to green and will say Disconnect Scope Ef PEMPro v2 0 w D La a F i o E T Unknown 0 00 1 00 200 4 00 RA Worm Phase Minutes z All Cycles Visible RAe Graph YSeae AP1200 GTO Configure Scopes Mounts AstroPhysics Telescope Disconnect Camera MaximDL CCD C Use Autoguider Port to Move Scope Worm period secs 362 95 s C Southem Hemisphere Min Star Brightness 1000 s Max Star Brightness 000 S sync Wom Cycle Log and Images Dir F Astrosave Pem Pro Tests _Testing E Scope Connected Camera Connected 4 Select the Polar Align Wizard tab and press Next to start the wizard 2 PEMPro v2 0 Sele File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Welcome to the Polar Alignment Wizard This Wizard will help you polar align your telescope very quickly and easily To get started make sure you have your mount approximately polar al
98. ate PEC Dialog will open and process the log file 2 PEMPro v2 0 F Astrosave PemPro Tests lmager log Malta Step 4 9f 4 Create PEuwe Press the Finish button and then PEMPro s Create PEC dialog will open Make drift fitting adjustments as needed then press the Create Paramount PEC File button PEMPro will create the PEC data and automatically copy into the clipboard and you will need to press the Upload in The Sky for your mount to accept the PEC data PEMPro will now display the processed curve 2PEMPro Create PE Curve ae iol xi File Graph Type Drift Fitting Periodic Error Linear Graph of Data and Fitted PE Curve Periodic Error AMS Error 4 076 aq FFT Waveform Analysis 7 ooo 3 000 3 333 Data Points Aad Asis s Num Time Cycle Phase Centroid Fitas Enor gt l 0 00 00 000 00 00 000 0 00 05 000 00 08 000 0 00 10 343 00 10 343 0 00 12 687 00 12 667 0 00 15 000 00 15 000 0 00 1 7 343 00 17 343 0 00 19 625 00 19 625 0 00 21 968 00 21 9685 D d 07 On Fe to Pa Initial Worm Phase Image Rall degrees 0 37 34 182 38 E B Periods tase Export Data mage Scale Worm Period secs Declination fanc sec piel 149 59 0 00 1 600 Create Paramount PEC File NOTE PEMPro is automatically configured to process the native harmonics of the ME and 1100S
99. ate a star or other object when your mount s alignment is not perfect Press one button to calibrate then another to start building a spiral mosaic which is displayed directly on the screen Once the star you are looking for shows up on the mosaic you can click on it and the scope will Slew to it The Backlash exerciser issues alternating North South moves to the mount while exposing an image It allows you to assess the state of backlash of your mount Too much backlash could result in poor autoguider performance The Calibration Wizard has been improved It now allows you to slew to the correct position in the sky and also to nudge the scope if needed to find a star or center it Numerous other small changes to make using PEMPro easier and more intuitive Other Features Collects periodic error data with using any CCD camera supported by MaximDL v3 or v4 required CCDSoft V5 or AstroArt V3 V4 No Autoguider is required or used If you are using a CCD with dual chips the main CCD is used making it easier to put a bright star on the CCD Corrects for camera tilt and star declination Graphically displays periodic error in real time Analyzes collected data and creates a smoothed periodic error curve Plays backo the inverse of the periodic error curve to the mount thus minimizing the periodic error Writes the PEC correction directly to some mounts Has easy to use Wizards to set up parameters accurately Frequency Spectrum shows
100. ation dialog gr PemPro v1 50 Mount Scope Configuration s Advanced Configuration Pulse Dynamics Pube Modula Fubbe msecs msecs AdgnessWeress 10 East 0 1 00 Pulse Phase Different East West settings imsar West 0 1 00 L Celestron CGE Meade LX200 all types 0 700 478 69 0 00 0 00 C AF 400 600 Astro Physi AP 4007600 GTO Rev D 2 230 44g 77 0 00 0 00 1 00 7 00 CF 11005 Paramount 11005 1 308 239 34 0 00 0 00 1 00 1 00 a O L 200 GPS Meade Tel Meade LX200 GPS 1 352 478 69 0 00 0 00 1 00 1 00 7A1 20016 Meade Tel Meade LX200 16 Classic 1 352 o 1070 0 00 0 00 1 00 1 00 an E Classic LX200 ScopeSim Meade L A00 Except GP 1 000 478 69 Step 2 Connect to your mount and camera control program and use PEMPro s Calibration Wizard to set up all of PEMPro s important parameters Use ASCOM as the movement method Since the Classic 16 has a way to get the current index no further steps are required as with the LX 200 GPS Getting the PEC curve to the mount After synchronizing to the mount you can follow the normal procedure for acquiring data and creating a PEC curve After you have done these two steps you can upload the curve directly to the mount from the LX 200 16 tab Press the From Created PE Curve button to load the curve Note that the curve will be inverted if the Movement Direction in the Settings Summary is set to Reverse If you don t want the curve inverted chan
101. ative the mount is to the east of the meridian if it is positive it is west of the meridian Meade Hand Box Focus Dieper updates every 3 0 seconds Quick Access Buttons RA Seg PEC On Sync PE PEC Off Out T High Accuracy Syne 35 secs Shift key to haid Enter Mode and Goto Mode Goto nN There are six Quick Access buttons that you might find useful Focus In Pressing this will move the focuser in Focus Out Pressing this button will move the focuser out SERENE You can find more details about using these buttons in the section on focusing below Quick Access Buttons RA Seg PEC On Sync PE PEC Off High Accuracy Syne 35 secs PEC On Pressing this will enable the mount s PEC PEC Off Pressing this will disable the mount s PEC RA Seg Shows the running RA PEC segment PEC must be on for this to display Sync PE Pressing this will synchronize PEMPro to the mount s RA PEC Segment counter You Should press this once when before you start acquiring data and whenever you notice the counter does not look synchronized in PEMPro The Hand Box and or PEMPro may not update immediately so they may not always look exactly synchronized In general if the counts ever are more than 1 unit apart then it is time to Sync PE again It is always very quick and easy to use this button so if you are unsure just use it IMPORTANT If you slew
102. ay Setup Acquire Data Analyze Program Mount Refine AP Raw PE PE Curve From Created PE Cure Smeoth Once PEMPro is connected to the mount on the Setup tab the From Mount button is enabled Also the Firmware Rev is displayed which should be a single ASCII letter For instance below this letter is I GTOCP3 s are identified by their firmware revision They are all Rev G or later Setup Acquire Data Analyze Program Mount Refine AP Raw PE PE Curve From rested PE Conve From Mount From File To Mount To File lt Shift Smooth Firmware Rev The From Created PE Curve button and all of the controls in the Modify PE Curve section are enabled if a curve has been created with the Create PE Curve dialog Also all the controls will be enabled if a file is loaded with From File or 3 From Mount is used to read the PE data Setup Acquire Data Analyze Program Mount Refine AP Raw PE PE Curve From rested PE Curve To Mount To File Modify PE Curve Shit Value cel Shift Shift gt 1 Invert PERS Smooth Scale 1 00 0 0 1 0 2 1 E 4 1 5 2 6 2 F 2 i 3 a 3 Here is a Summary of all of the controls From Created PE Curve loads a PE curve that has just been created or loaded A previously created curve ppc can be loaded through the Refine page Just load a curve with the Curve 1 button then go to the Program Mount section and press Use Curve
103. ayback button P PEMPro v1 50 Acquired PE Data Load File Settings Tools Wizards Help loj x Arc Seconds PEC OFF ake 1 00 00 Per ON RA Worm Phase Minutes recorr Al Cycles Visible gt Current RA RA Asis Graph r Scale Total Time Wom Phage Worm Cycles Samples K 4 00 1 41 38 01 35 4 Jl Setup Acquire Data Analyze Program Mount Refine Start Playback Configure Scopes Mounts ideal Pulse msec Status PE 2_ 0 2 1 arc secs RA AXIs x Penod 100_00 secs Image Seale farc secipinel 1 000 Countdown Timer 1 40 Scope Connected Camera Connected SubFrame r5 75 124 124 Tracking Stopped 11 Now press the RECORD button in the Simulator A PEMProSim F ypource Pemp Fie Config Abou ESS Ee 12 Now you will see a few new curves appear on the graph The graphs may look weird until at least one cycle has completed You can turn on and off the various curves with the check boxes The most important curve is the Corrected PEC as that is what the PEC would look like when programming a perfect mount The curve looks jagged because the mount s PEC tables do not provide a continuous correction only an update at regular intervals You can investigate the effect of more PEC cells on the smoothness of this curve by changing the PEC Cell Count in the Mount Configuration parameters Realize however in a r
104. ays back the curve the programmed PEC curve PEC Off Plays back the PEC curve only Record Starts a PEC record from scratch Before recording you should have Acquired Data for a couple cycles in PEMPro then created a curve in the Create PEC Curve dialog and finally Started a Program Mount This is basically the same procedure you would do normally with a real mount Update Starts a PEC record while playing back the original curve added to the last corrected curve J PEMProsim F Source PemProScopeSim bin PEMProtestCurve ppc E O oO x File Config s Faw PE M Movements Current orm Phase Current PE alue Y Seale farc secs Raw FE PEC Table Current YYorm Phase PEC Left PEC Right O 00Secs 4 10 Num Time _Command _ Worm Phase PE arc sec _CunCon __ TotalCon_ Corrected PE 75 609 Connect There are also a few checkboxes at the top Raw PE The raw PE is displayed PEC Table The PEC table last recorded RAW PEC PEC Table Sum of the above two This curve is effectively what you would see with your mount s PEC is on after training PEC Movements Movements made to the mount when programming PEC This always shadows the PEC Table Mount Parameters You bring up the mount configuration in the menu by selecting Config Mount Parameters Configure Mount and PEC g X General Worm Period FS nis 100 00 N is Wrest Finel Scale farc secs pin Relap X 1 00 Gui
105. be sure to click the Properties button to configure the driver for your telescope Astro Physics GTO Mount Celestron Telescopes Dome Control and Hub Gemini Controller Generic Hub Genenc L200 Type Scopes MM axPoint Meade s200 and Autostar Some telescopes will require that you click Properties on the ASCOM Telescope Chooser to set up your telescope s properties such as COM port and focal length After this you will be able to press the OK button Alternatively you can click the Edit Driver Settings button on the Mount Wizard window PEMPro Mount Quick Setup Wizard Saks Mount Quick Setup Wizard STEP 3 ASCOM driver Part 1 if your mount has an ASCOM driver leo ACAM Pieces then check Use ASCOM Driver and select Pe aii the diver Do not connect through a hub like POTH which may cause timing problems in __2elect ASCOM Driver some cases ff your mount does not have an ASCOM driver then ignore this step AstroPhysics Telescope Part 2 you havent already configured the LK COM port and other settings then the ver settings Edit Driver Settings button and do so Press Finish to exit the wizard and return to PEMPro s main window Other Mounts If your mount was not in the list the worm period is the only missing parameter that you need to determine The worm period can be calculated from the number of teeth in the worm gear If you click Next from Step 2 with Other
106. below You would use this button on your curve if the curve causes the mount s periodic error to double instead of reducing it Smooth Does a very modest smoothing of the curve The Smoothing consists of doing a weighted average of each cell with its the two nearest neighbors Scale Scales the curve by the factor in Scale Value If a curve over or under corrects the periodic error of your mount you could use this to fix the curve without re acquiring data Clear PEC Fills the entire PEC table with O s IMPORTANT After making adjustments to a PEC curve with any of the above buttons you will need to write it to the mount with the To Mount button Celestron Mounts These directions apply specifically to supported Celestron mounts With PEMPro you can ee a a Precisely shift the PEMPro created PEC curve to tune for camera delays Upload a PEC curve to the mount PEC table Download and display the mount s PEC table Save a PEC curve to a file compatible with Celestron s PECTool format Read a PEC curve from a previously saved file by PEMPro or Celestron s PECTool Perform the initial mount Seek Worm Index Modify a PEC curve before sending it to the mount You can o Shift entire curve o Invert the entire curve o Scale the entire curve o Smooth the curve Fix residual drift in the PEC Curve this can happen on a PEC Curve created with an autoguider Turn PEC On Off When you connect to the mount the worm period and phase
107. button down and moving mouse on graph will adjust Graph Y scale PEC Polar Align Wizard Star Finder Backlash 100 0 u T 500 T oe 0 0 i 50 0 Holding the left mouse button f TS down while moving the mouse up f 100 0 or down adjusts Graph Y Scale 150 0 PECOFF 1 8 3 4 5 6 7 B 5 10 11 Worm Cycles PEC ON i Al Cycles Visible gt CIES gt RA ale 30min 20 73 sec Total Time Motor Index Wom Cycles Samples E Motor n AERA pe _ 4140AcSes 1 59 47 1 15 529 e New Feature Added new Backlash Exerciser mode that instead of stopping tracking moves the RA axis East Necessary because some mounts don t allow North South ASCOM PulseGuide calls to function when tracking is false Backlash Exerciser Settings Movement Status Magnifier N25 Move Image wf Duration Duration Extra Delay Between aes Secs Secs Moves msec th Em os al v Position i mS i w Lower Right ASCOM DEC RA ASCOM DEC RA ASCOM DEC AA e New Feature Added Timer function to Acquire data and stop mount tracking after X hours Allows you to leave the mount recording PEC data for an arbitrary amount of time Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine Eamon v C Always show last centroid _ Adjust Xfor
108. cale 0 056 2 Camera Angle Measure Time secs Adjust Image oe CIF et Histogram Stretch Adjust by Dragging Markers below Graph Seles Telescope Shee Lieve A eae SO Peo AmE RA 03h 39m 33s Dec 00 00 00 Slew Scope N Siew Y A Distance t Scope Connected Camera Connected e New Feature Added Meade DSI III Support beta e Changed Full Screen button to a checkbox in Polar Align Wizard Step 3 e Fix Histogram dialog would not show lower and upper image stretch marker positions correctly V2 00 May 30 2008 Build 45 e Fix Failed to create bitmap sometimes would show up when trying to display images in the Polar Alignment Wizard V2 00 May 9 2008 Build 44 e Fix Altitude arrow fix in build 42 inadvertantly affected the raise lower text V2 00 May 5 2008 Build 42 e Fixed button colors on Setup tab e Fixed Altitude Arrow direction in Step 8 of Polar Alignment Wizard V2 00 April 20 2008 Build 41 Fixed Raise Lower bug in Pole Align Wizard that can happen in certain orientations Added full screen view of NSEW Step 3 of Polar Alignment Wizard Changed the single Start button to separate Start Stop buttons in several places Added support for multiple Meade DSI Cameras Added pause to cover scope to allow dark frames for Meade DSI Cameras Fixed display of images from Meade DSI cameras V2 00 March 29 2008 Build 40 Private buil
109. cked will display the full path name If not checked just the filename will display Show Data Points If checked will also show the original data points corresponding to the curve as shown below Create New PE Curve Press the Create button to perform the action defined and apply the scale factor in the Scale Curve text box Create New PE Curve Shift Curve Save Program Mount Subtract 2 from 1 Curve 1 Red Created Curve Geen Curve 1 Red SCALE CURVE STEPS OFFSET Create 1 00 lt gt 0 Gave Curve Use Curve Shift Curve Shift the curve left or right by the appropriate number of units Press the Info button for the files to see the number of steps in each curve Usually the value is 1000 steps per worm cycle So if the worm cycle is 1000 seconds long each step would represent 1 second Save Curve Save the curve to a file Program Mount Select the curve then press Use Curve The curve will be loaded and ready for playback by the playback engine Menus File e PEMPro v2 0 AA Settings Tools Wizards Help Load File for Analysis F2 1 Load Existing Curve Shift F2 e Create a FE Curve F3 Export PE Data F4 Exit Load File for Analysis Duplicates the functionality of the Load File button on the Analyze tab Its keyboard shortcut is the F2 key Load Existing Curve Loads an exsiting curve ppc that was previously created by PEMPro The
110. connecting the network cable So if you cannot get PEMPro to connect you should try installing Microsoft s loopback adapter which should allow communications to work http support microsoft com kb 839013 Calibration Center a reasonably bright star and click Calibrate A dialog will pop up that will allow you to adjust Calibration parameters File Video Help Enter Video Calibration Values Calibration Times Pixel Size RA 10 Seconds X 10 00 Microns A v A Yv Seconds Y 10 00 4 Microns Dec 5 Other parameters Star Declination Dec Backlash Runout Time 01 Degrees 20 Seconds v Calibration star Auto Select Manually Select Cancel PEMPro Calibrate Find Star Track Move Aro sec pixe mee 1 Tracking radius cale i Degrees Cursor Pos s Image 13 5 A PAC AQC Tracking Enabled Angle 3 3 lF 246 496 0 In the Enter Video Calibration Values window e Calibration Times this controls the duration of the RA and Dec movements The RA movement is accomplished by turning off tracking You can increase the accuracy of the calculations done in this step by increasing the calibration times However if the star goes off of the camera then the results will not be accurate e Pixel Size Not used currently e Other Parameters The Star Declination will be retrieved from the mount if it is connected and is a supported function If not you can edit it here The Dec B
111. csi RA Worm Phase Minutes lt All Cycles Visible RA RA Axis Graph Y Scale Total Time Motor Index _ Wom Cycles Samples x 69 33 amp 0 05 55 4311 0 0 Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine EQMOD Binning 1 vi _ Always show last centroid Adjust Xfor X Drift X Drift 0 00 q Enable Automatic Subframe 100 x 100 v X Y in are seconds C Adjust Yfor Y Drift Y Drift 0 00 St iid pa Num Time Wom Cycle Wom Ph X Centroid Y Centroid Max Pixel Exposure Delay Seconds 0 10 a v Imana Grala ArnSaerc Pivell g Scope Connected Camera Connected 5 For more details on the controls on this tab see the section on Acquiring Data After you have acquired 5 6 cycles of PE data click Stop the same button as Start The button name is changed to Stop while running PEMPro will automatically ask you if you want to create a PEC Curve Click Yes Step 6 Creating a PEC Curve More details to be filled in later Follow the instructions in this section Step 7 Uploading a PEC Curve to the mount through EQMOD Here is an example image of the EQMOD tab and graph 23 PEMPro v2 5 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Mount Peak to Peaki PE 24 49 Arc secs File Peak to Peak PE 24 51 Arc secs PEMPro Peak to Peak PE 24 66 Arc secs Refinement Peak to Peak PE 0 00 Arc secs
112. curve will be loaded into the Program Mount tab Also if you are in the AP Raw PE Celestron Gemini L4 LX200 or RCX400 tab a raw curve will be automatically created for that mount Create a PE Curve Duplicates the functionality of the Create a PE Curve button on the Analyze tab Its keyboard shortcut is the F3 key Export PE Data Duplicates the functionality of the Export Data button on the Analyze tab Its keyboard shortcut is the F4 key Settings Z PEMPro v2 0 File Beceem Tools Wizards Help PEt Edit ASCOM Driver Settings Settings Summary De Rotate Data w Adjust Data for Declination w Calibrate Images when Acquiring Data w Disconnect Scope on Disconnect Disconnect Camera on Disconnect Disable Fundamental Auto Find w Keep Main Form on Top w Restore last position when starting Ask for Filename and Comments when Acquiring Data Night Screen Mode Settings Summary Opens a dialog that contains all of the configuration settings that were set by the Setup Calibration Wizard Here the settings can be reviewed and changed manually if needed Its keyboard shortcut is the F5 key Note The setting Movement Direction is also used to control whether or not a PE Curve is inverted or not when you press the From Created PE Curve button in the LX 200 GPS RCX 400 and LX 200 16 tabs This is necessary to account for the orientation of the camera So if your periodic error doubles when using the
113. curve you upload to one of those mounts just invert the curve and reload it et PEMPro Settings Summary Bek Wom Period seconds 982 9515 a RA Image Scale arc sec pieel i peo z Muide Hate feidereal mitat 4am A l lee Image Rall Angle degrees 79 40 Star Declination degrees 0 02 z RAAxisonCCD x v CCD Relay Aisto Use x v Movement Direction Reverse y De Rotate Data If checked recommended PE data will be de rotated to appear on the X axis Use the Setup Calibration Wizard to determine the roll angle of your camera or enter into the Settings Summary dialog the value you obtain from image linking software Adjust Data For Declination If checked recommended a star at any declination can be used for measuring periodic error when acquiring PE data Calibrate Images when Acquiring Data If checked the full frame image is dark subtracted to remove dark noise and hot pixels However when PEMPro starts imaging Subframes only MaximDL is supported and you will need to set up calibration in MaximDL see MaximDL documentation Disconnect Scope on Disconnect f checked PEMPro will attempt to disconnect the scope from all applications not just PEMPro when you press the Disconnect Scope button in PEMPro Disconnect Camera on Disconnect f checked PEMPro will attempt to disconnect the camera from the camera control application when you press the Disconnect Camera button in PEMPro Disable Fundamenta
114. d e Added fixed exposure mode for Pole Align Wizard e Reduced minimum Max Exposure time to O seconds for Pole Align Wizard e Added Custom Commands to start stop telescope tracking V2 00 February 29 2008 Build 39 Included a missing DLL required for Meade DSI support V2 00 February 26 2008 Build 38 Fixed date format issue that can happen in certain world regions Added Overlay color picker to Polar Alignment Wizard so that the overlay colors can be changed and made semi transparent BETA FEATURE Meade DSI support Fixed aspect ratio and size of image displayed in Adjust Azimuth and Altitude steps in Polar Alignment Wizard Changed Astro Physics PEM upload procedure to ensure EEPROM read write collisions do not occur Fixed link to ASCOM downloads page Removed unused button from video interface Added 10 second timeout to video calibration V2 00 December 17 2007 Build 37 Fixed star loss problem when using polar alignment wizard Fixed direction problem in polar alignment wizard Added support for Meade DSI cameras Added night mode so Red text shows up better on polar alignment graphs Fixed Gemini Level 4 curve inverted bug Fixed a few bugs in the video interface application Added dialog box to control in program video settings Added Fitting level and the list of Fundamental Frequencies to PPC files V2 00 July 13 2007 Build 31 Public Release V2 00 When Acquiring PEC Data with the Vid
115. d Camera Connected 14 Click Next see picture below Click Reference Image to take a snapshot of the current position in the sky NOTE Although not shown in the pictures of Step 9 below there are now an Overlay Color button present Clicking this button brings up a dialog that allows you to configure the color and transparency of the text arrows and circle used at times in this step PEMPro Overlay Color Picker Transparency 50 98 Er 2 PEMPro v2 0 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Adjust Mount s Altitude Step Gof Azimuth Error Sten 9a Full Screen Press Reference Image to get a reference image Click on the brightest star PEMPro will display the direction and distance to move the star IF NEEDED slew scope to reposition the star or find a nearby brighter star Remember to press Reference Image again after slewing Step Sb Adjust mount s ALTITUDE until the star moves near to the end of the amow Press Take Image to view an image of the star position Continuous Telescope Altitude Show Hour Angle E ia 42 57 na 14h 37m de Paith Dec 00 00 i We 224 35 Slew Scope a x E s of Taa Scope Connected Camera Connected 5 PEMPro v2 0 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Adjust Mount s Altitude r t Azimuth Error Step 9a Full Scre
116. d iS protected by United States copyright laws international copyright treaties and all other applicable national laws Title ownership rights and intellectual property rights in and to the software shall remain with Sirius maging Ray Gralak The Software Product is licensed not sold There is no transfer to you of any title to or ownership of the Software and this license shall not be construed as a Sale of any right in the Software 2 Other Restrictions You may not reverse engineer decompile or disassemble the Software Product or make any attempt to discover the source code to the Software Product Except as expressly permitted in this License Agreement or with written permission from Sirius l maging Ray Gralak the Software may not be used copied redistributed retransmitted published sold rented leased marketed sublicensed assigned transferred altered or modified 3 You may install only one trial license per household or business for evaluation purposes 4 For business use one full license must be purchased for each personal computer that PEMPro is installed on and can be used only on equipment owned by that same business 5 For individual personal use the license entitles you to install and operate on any number of your OWN personal computers for use ONLY on telescope equipment that YOU personally own 6 Liability THERE IS NO WARRANTY FOR THE SOFTWARE PRODUCT TO THE EXTENT PERMITTED BY APPLICABLE LAW
117. d the curve into PEMPro with From Mount press Invert then press To Mount Smooth Does a very modest smoothing of the curve The Smoothing consists of doing a weighted average of each cell with its the two nearest neighbors Scale Scales the curve by the factor in Scale Value If a curve over or under corrects the periodic error of your mount you could use this to fix the curve without re acquiring data Clear PEC Fills the entire PEC table with O s Fix Drift Fixes residual drift in the PEC Curve This can happen if you trained PEC with an autoguider instead of using PEMPro PEMPro will never leave residual drift in the curve IMPORTANT After making adjustments to a PEC curve with any of the above buttons you will need to write it to the mount with the To Mount button EQMOD QUICK START These directions apply specifically to the EQMOD ASCOM driver for these mounts With PEMPro you can handle all aspects of PE recording curve analysis PEC curve creation and uploading a curve to EQMOD There is no need to use log files from third party applications although PEMPro can read and analyze EQMOD PERecorder log files If you are using a CCD you can use the entire frame of the CCD not just a small subframe You don t even need to disable autoguider outputs The data is dynamically and automatically updated on screen in real time Camera support includes a completely automatic automation interface to MaximDL V3 V4 V5 CCDSoft V5
118. d to manually synchronize PEMPro PEMPro will automatically synchronize to the Paramount GT1100S and Paramount ME when you connect to TheSky6 in PEMPro Also when using TheSky6 when you press Start on the Acquire Data page PEMPro automatically queries the mount for the current worm position and synchronizes the data that it is about to collect to the mount s worm phase This means that you can freely move the mount before acquiring data without the risk of forgetting to synchronize PEMPro to the Paramount If you are using TheSky5 use the following procedure to synchronize PEMPro 1 Connect to the mount from the setup page When doing so you will be prompted to connect to TheSky 5 or 6 Select whichever one you have installed and want to use 2 In TheSky5 6 go To Telescope Options More Settings and select the Periodic Error Correction tab 3 Note the running PEC index counter it should be decrementing quickly More Settings for Paramount ME Advance oming Limi Setup Periodic Error Correction Status TARA ANE Table to display Polynomial order Recorded E Polynomial Sine curve 1 6 arcseconds 1 8 arcseconds Apply PEC correction Recorded table Offset 0 8 arcseconds ero Flash 4 Go into the setup page of PEMPro and change the Sync Index value only visible when the mount IS connected to a number lower than the running PEC index of the mount setup Acquire Data Analyze Frogram Mount Refine
119. damental was missing PEMPro Edit PE Fundamental Preges es e Clicking OK applied the changes in the fundamentals Back in the Create PE Curve dialog selected the Periodic Error graph type The RMS is now down to 2 041 arc seconds and the graph matches more closely to the curve 14 4 16 1 Click to displa ne orm cycle n Since there were 3 cycles of original PEC data you can view the other cycles by pressing the double arrow button noted above Each click moves the graphed data over exactly one graph cycle Here are the other two cycles Graph Type Drift Fitting ra ore RMS Error 2081 Periodic Eror 5th Order 23 min 56 Secs 241 Graph of Data and Fitted PE Curve Periodic Error 14361 Graph Type Drift Fitting RMS Error Periodic Error 5th Order 47 min 52 Secs Graph of Data and Fitted PE Curve Periodic Error 14 3 16 1 As you can see the created curve matches very well There is still a little residual drift left over probably from tiny imperfections in the worm gear In any case it is a close match to the periodic error Note that there are a couple random spikes in the data that would probably have been a disaster if they were recorded via an autoguider Even averaging several cycles would not fully fix this type of error Creating and using the PEC curve The next step is to create a PEC curve and program the mount After pressing the Create PE Profile and Clos
120. data you have just acquired or a previous log file Setup Acquire Data Analyze Program Mount Refine AP Raw PE gas 5 13 2006 11 25 09 PM Adjust X for X Drift X Drift 0 008447 MaximDL CCD V5 TETS Adjust Y for Y Drift Dat 0 027509 AP 1200 XY in arc seconds Initial Phase 3 36 09 Num Time Worm Cycle Worm Ph Centroid Y Centroid Max Pixel User Comments 0 00 00 060 1 03 36 090 0 000 9801 00 ae 0 00 02 443 03 38 473 590 0 627 6692 00 lle ea 0 00 04 666 03 40 696 75 0 180 10061 00 0 00 09 683 0 00 11 997 0 00 14 310 03 45 713 rs 0 536 766 00 03 48 027 mt 1 42 10066 00 03 50 340 Pe 0 604 8398 00 Image Scale arc sec poe 0673 E 2 1 3 1 4 0 00 06 5990 1 03 43 020 0 247 12175 00 5 1 G 1 7 1 Create PE Curve To analyze your PE data you press the Create PE Curve button to bring up another dialog that uses the Fast Fourier Transform FFT to extract periodic error terms from the data The FFT is a numerical method that identifies periodic curves in the data The more data points you have the better the analysis will be Load File Use this button to analyze your old log files or someone else The log files are stored in the directory you specify on the Setup page You can navigate to any directory on your PC with the Open file dialog that is displayed Export Data This button allows you to export the data in the table so that it can be analyzed in a sepa
121. de Rate Relay 1 00 Positive Peakto Peak arc secs PEC Cell Count 410 200 Seeing Simulated Seeing Enable 0 50 Close Worm Period The loaded PPC file is scaled to the worm period you enter here usually choose about 100 seconds so can collect a worm cycle of data quickly Pixel Scale Sets the pixel scale Usually there is no need to change this Guide Rate Sets the emulated guide rate Usually there is no need to change this Peak to Peak The magnitude of the peak to peak periodic error of the loaded PPC file is scaled to what you enter here RA Axis Selects the RA axis Leave at the default Relay X Selects the direction of the Relay X move If the periodic error gets worse when programming change this value from Positive to Negative or vice versa Relay Y Selects the direction of the Relay Y move PEC Cell Count Number of PEC cells to simulate in this mount LX 200 s have 200 cells AP mounts have 970 Paramount s have 1250 Celestron s have 88 etc Seeing Check this to enable simulated seeing It is a good idea to keep Simulated Seeing to less than 0 50 Using the Simulator 1 Bring up the PEC Simulator then select Simulator and press in PEMPro 2 Select Simulator as the scope to connect to on the PEMPro Setup page 3 IMPORTANT make sure that Use Autoguider Port is checked Setup Acquire Data Analyze Frogram Mount Refine Connect Scope a
122. dy G 11 Gemini The final step defines the ASCOM telescope driver Most mounts have ASCOM drivers with some notable exceptions such as Software Bisque s Paramount series If your mount does not have an ASCOM driver PEMPro Supports connections to the mount through Software Bisque s The Sky 5 Level IV and The Sky 6 Professional It is recommended to use the ASCOM driver if your mount has one and if not just leave the Use ASCOM Driver checkbox unchecked PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 3 ASCOM driver Part 1 ff your mount has an ASCOM driver llee ACR ae then check Use ASCOM Driver and select eo ee the driver Do net connect through a hub like POTH which may cause timing problems in some cases if your mount does not have an ASCOM driver then ignore this step Astro Physics Telescope Fat 2 you havent already configured the COM port and other settings then click the nVer JELLINGS Edit Driver Settings button and do so If you are not sure which driver is applicable you should email pempro ccdware com F PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard n AA Ai w ASCOM Telescope Chooser Select the type of telescope you have then be sure to click the Properties button to configure the driwer for your telescope Astro Physics GTO Mount Celestron Telescopes Dome Control and Hub
123. e is shifted by 10 seconds to the right i p i oD a e T rE Worm Phase Minutes a _ Al Cycles Visible gt ee hee RA Aas Graph Scale Total Time Ea 30 00 0 10 21 02 02 Setup Acquire Data Analyze Program MoyAt Refine Celestron Firmware Rew 5 6 celestion PE Data 6 Check Corrected PEC After you upload the new PE correction curve you will want to turn PEC On and acquire at least 2 worm cycles of data If you see that the periodic error is worse than before you can go back to the Celestron tab and press the Invert Curve button and then click To Mount to send the curve to the mount again Then start the acquire data again The mount s periodic error should be significantly reduced Setup Acquire Data Analyze Program Mount Refine Celestron PE Curve Firmware Rev 5 6 From Created PE Curve E TE a PE Data Sesk Index FromMount FromFile fe mee We ee eT To File Lo o sd on toh a Pode da su su ES If after checking the corrected periodic error of the mount you find that you want to try for further improvement you can use the Refine feature Celestron Tab features Below is the Celestron tab before connecting to the mount All the buttons and controls are disabled except the From File button and the Shift and Scale numeric up down controls If you click From File you can load in a previously saved PEC curve The table will then fill with entries f
124. e Phase Wom Cycles Samples x 8386 1607 oo20 19 5259 Setup Acquire Data Frequency Spectrum Program Mount Refine Gemini L4 Create a PE Curve C Adjust Xfor X Drift x Dit 0 017002 Load File F Adjust Y for r Drift Y Drift 0 00000 o a Wom Cycle Worm Ph MCentroid Y Centroid ea User Comments 10 01 338 ers j Worm Parod seconds peste 1 1 4 865 5 1 00 04 328 Image Scale arc secipinel 3 00 05 328 1 00 06 328 17 g 00 07 328 First select the type of mount If you don t see your mount you can add your own mount information described later E NEET i a ce T SSS a Tae Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine Gemini L4 Show Known Mount Fundamentals il Integer Fundamentals Mount Click and select Known Mount Fundamentals ET T your mount Show Selected Frequency Mach 1GOTO manster Drives gear teeth IRIEIRIEI IE i m fi oo se 472 69 Worm Period 1 Een yt Scope Not Connected Camera Not Connected Integer fundamentals are those frequencies that are integer multiples of the worm frequency that is they repeat exactly N times in one worm period Integral frequencies normally can be corrected by PEC Non integer fundamentals almost always cannot be corrected but you might be able
125. e button the curve is automatically loaded into the RCX400 tab of PEMPro Also created behind the scenes is a special PEC file which can later be reloaded for later refinement It has the same name of the file it was created from except it has the file extension ppc will use this file later when refining the PEC curve t PEMPro v1 50 B x File Settings Tools Wizards Help wi T o q 4 J T RA Worm Phase Minutes Al Cycles Visible gt RA PEC RA Axis Graph Y Scale Total Time Worm Setup Acquire Data Analyze Program Mount Refine RCX 400 PEC Residual Periodic Error Table Factory PEC Clear PEC 0 00 LS ea ee ee oo To upload to the mount click the To Mount button which is marked with a red rectangle above Refining the Periodic Error Correction Curve After loading the mount with the above curve Greg Sellek went through the above steps again with PEC on and provided me with the raw data From that data created a second PE curve That is one with PEC on A comparison of the two curves is shown below in the Refine tab of PEMPro Using the Curve 1 button loaded the original uncorrected PEC curve red curve Using the Curve 2 button loaded the curve with PEC on blue curve As you can see the blue curve is only about a 50 reduction in PE Not too good E PEMPro v1 50 nl x Fie Settings Tools Wizards Help Peak to Feak PE 20 49 Arc secs RMS 7 41 Arc
126. e in the graph area and that will find and highlight the line in the table associated with that point on the graph Then if you double click the table entry that will bring up a dialog that allows you to manually edit the data This is what that dialog looks like Make your changes and press Close to exit the dialog Changed values are reflected on the graph and can be written to a file or back to the mount An Important Note about the Meade PEC Utility The Meade PEC Utility can read the PEC data from your mount just like PEMPro does The Meade utility always displays the data from the first PEC cell to the last cell which if you are located in the Northern Hemisphere is reversed from the way the PEC data is actually played back with PEC running That is the mount starts with the last cell and decrements when in the Northern Hemisphere PEMPro will automatically reverse the data when displaying it after a From Mount if the Southern Hemisphere flag on the Setup page is not checked Thus PEMPro s display of the mount s PEC data will look different from that which the PEC utility displays This is expected and does not represent any problem with PEMPro Version 3 0i and earlier firmware These directions apply specifically to the Meade LX200 GPS with firmware version 3 0i and earlier installed Note all LX200 R and LX200 ACF telescopes have later firmware versions than this To get the best performance from PEMPro it is recommended that
127. e the features of the curve creep forward or backward between cycles then the mount is not tracking at sidereal rate Check your user manual for a way to adjust serial rate If the shifting is to the right then the mount is tracking too slowly The mount seems 1 Improve polar alignment to have a lot of 2 Could be from refraction or mount flexure drift The curve in 1 Increase the Drift Fitting level Create PEC dialog 2 Look at the Frequency Spectrum to see if all of does not match the fundamentals are accounted for my curve very 3 If there are non integral fundamentals in the well Frequency Spectrum they cannot be modeled and corrected by PEMPro or by any other method Unhandled Hopefully this won t happen but if it does try to do a exception occurs screen capture or carefully write down the message and email to ray gralak com Mounts with Astro Physics GTOCPS3 Control Box These directions apply specifically to the Astro Physics GTOCP3 controller With PEMPro you can Turn PEC On Off when connected Read and display the mount s PEC table Upload a PEC curve to the mount PEC table Save a PEC curve to a file Read a PEC curve from a previously saved file Clear the mount s PEC Adjust a PEC curve before sending it to the mount NOUBWN FE Also 1 When you connect to the mount the worm period and phase are automatically determined from the mount PEMPro is automatically synchronized to the
128. eal mount this value ts fixed For instance some Celestron mounts have 88 cells LX200 s have 200 cells and Astro Physics mounts have 970 cells More cells is generally better If the periodic error gets worse when programming go to the Mount Parameters dialog and change the Relay X value from Positive to Negative or vice versa ye Sim bin x GI PEMProsim F Source PemProse Fj Faw PE M Movements Current Worm Phase Current PE Walue Y Seale farc secs W Raw PE PEC Table PEC Table what was recorded File Config About Corrected PEC Raw PE PEC Table e hdmi mt Enh nard nvr ee ee ee ITIS ee ee ee RPP F YY aw PE T PEC table PECLeft FECRight 000Secs 061 F Peak to Peak Value ComectedPE P02 567 POs FT fO4 44 PORT FF P08 583 710 989 13 396 T17 005 16 206 13 411 r20 614 Relap 02 10 Relay 0 10 Relay 0s 20 Relay 0 10 Relay 07 10 Relay 04 10 Relay 0 10 Relay 0 10 Relay 024 10 Relay O 4 10 Relay 0 10 Note The second box to the right of the PEC Right button is the peak to peak value of the Corrected PEC One last thing you can simulate is the effect of changing the PEC Phase If you press the PEC Left or PEC Right buttons the PEC table is shifted left or right You can see that just a few seconds of phase shift changes the corrected PEC significantly For instance pressing PEC Left a few times produces this curve which now has a do
129. eft for the version number w Astro Physics GTO Mount Setup Software Wer Mount Local Time Side of Pier Mount Time one R 4s DEC i HL SerialPort CoM ig Swap E W Buttons Tracking Rate Sidereal el If Swap H 5 Buttons Slew Speed ee E Use Horizon Check Guide Speed M E FEM Playback Backlash Compensation AA HH MM 55 DEC DD MM 55 onoo ooroo00_ Aperture bB Focal Length pm imm imm io era n M Site Elevation lo meters Longitude A foon moan Get Latitude and Longitude from mount controller Fark Alitu de F ark Azimuth l Slew Before Park Sync Park Pos AP1 A4P2 AP3 User Defined ASCOM Version 4 1 25 2005 Sehgal Obseryatones Inc Run the Calibration Wizard before acquiring data Once every session before acquiring periodic data you should run the Calibration Wizard The Calibration Wizard sets all of the important parameters used by PEMPro to accurately calculate periodic error Note that you don t need to run this wizard if you are analyzing data previously collected Some of the settings established include Telescope declination Camera tilt angle Which axis of the camera corresponds to Right ascension Image Scale Telescope movement direction Before starting the Calibration Wizard you should center a 6th 8th magnitude star in the center of your CCD camera The star should be just west
130. elect your telescope type from this drop down list box If it is not in the list you will need to enter the worm period in seconds in the Worm Cycle period secs numeric text box If you would like to have your telescope type added to the next minor release of PEMPro please email mailto pempro ccdware com subject Request for new mount type The Mount Scope Table has an entry for each mount scope that you define The text you find in the Descriptions column of this table will be what you see in the drop down list box to the right of the Connect Scope button of the Setup Page You can change the current selected scope by clicking its checkbox Only one scope can be selected at a time so when you select another entry any previously checked entry will be cleared You can also select a scope mount by double clicking its entry Items can be loaded into the text fields by clicking its entry in the table with the mouse If you edited any fields a dialog will pop up asking if you want to save first The selected entry will be either blue if it has focus or yellow see figure 2 if the focus is on another control in the dialog The following buttons perform actions to the current mount scope or an entry in the Mount Scope New MountS cope Table New Mount Scope Press to enter a new mount scope definition You can also use Save As to create a new scope from an existing entry Save Press this to save your changes Save Save As Press this t
131. elow Note If after making the recommended adjustment the drift increases you should adjust the mount the opposite of what the direction says If this happens please report this to the PEMPro Beta forum stating your equipment Telescope camera and camera control program whether you are in the Northern or Southern hemisphere and which side of the meridian the scope was pointing c Once you make an adjustment go back to step 12a above Continue making adjustments until the measured drift IS minimal When you are satisfied with the drift proceed by clicking Next NOTE Although not shown in the pictures of Step 8 below there are now separate Start Measuring and Stop Measuring buttons present on this step PEMPro v2 0 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Measure Altitude Error a Step 8 of Pane tol RE C View other Axis DRIFT arc secs vs TIME minutes Stop Measuring The daft value may be unstable for a couple minutes After it settles down note the alignment emor then go make an adjustment to the mounts ALTITUDE Wait a couple more minutes and make further adjustments as needed Lower Altitude Axis 24 6 arenes Interval mins arc secs 4 a Show adjustment in arc seconds Telescope Altitude L Show Hour Angie Az o7 A 14h 3 m Azimuth Dec 00 00 22413 Slew Scope Ho s anoe E s g 1 arcmin Scope Connecte
132. en Fress Reference Image to get a reference image Reference Exposure Image Settings Click on the brightest star PEMPro will display the direction and distance to move the star IF NEEDED slew scope to reposition the star or find a nearby brighter star Remember to press Reference Image again after slewing Step Sb Adjust mount s ALTITUDE until the star moves near to the end of the amow Press Take Image to view an image of the star position Take Image Continuous a es Step 2 of Telescope Altitude F Show Hour Angle 3 ae 2A 42 05 Ra 14h 37m X Aaimuth Dec 00 10 f we 226 41 Slew Scope Sew lE Distance Sarcerin S Scope Connected Camera Connected 15 Click Next one more time to reach the Finished page Here you can exit or choose to redo the Azimuth or Altitude measurements 2 PEMPro v2 0 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Finished You have completed a polar alignment run If you would like to exit please click Finish lf you would like to remeasure Polar alignment of either axis please click one of the buttons below Redo Azimuth Measurement Redo Altitude Measurement Altitude Show Hour Angle ps S A 52 94 RA 15h 45m ie a Azimuth Dec 00 00 i BE 186 17 Slew Scope Telescope Siew oe a e Sa E 5 arcmin i Scope Connected Camera Connected Polar Alignment Wizard
133. enu which will bring up this dialog PEMPro Video Interface Seg Video Dialog Selector Dialog Type Dig_Capture Capture Image controls Camera controls Audio controls i Custom Video Proc Amp Stream Format Performance Control Q Lighting is poor you could increase sensitivity by aj d v activating Full auto mode or reducing the frame rate x Full auto Frame rate OOO a qua per second Help Image controls Modes Brightness O l Black and white E O kd Saturation Miror image i o g r gE Backlight compensation IMPORTANT Once connected and if the video mode is working properly you should see crosshairs and a running frame counter in the bottom right If you don t see the crosshairs and or the frame counter try changing the Video Sub Type see above Here is an example of a bad frame A PEMPro Video Interface C Tracking Enabled And a good one Find Star Track Tracking radius Calibrate EE Cursor Pos EEk maaga 14 93 deg Angle 7 284 0 PEMPro Video Interface Secs PEMPro Calibrate Find Star Track eee see Image 5 Tracking radius Scale Cursor Pos C Tracking Enabled GE 1493deg 8252 46 Step 4 Calibration First make sure you unpark your mount in EQMOD EQMOD ASCOM D E B R ASCOM DISPLAY Make sure your mount is
134. eo Interface the Exposure Time setting now sets the proper exposure duration Miscellaneous fixes to the full screen mode in steps 6 and 9 of the Polar Alignment Wizard Video interface now works in all steps of the polar alignment wizard Backlash Magnifier now is visible if checked and entering the Backlash tab for the first time Video Interface should now work in any International version of Windows Pole Alignment Wizard and Star Finder now report RA Dec and Alt Az to the nearest arc second was previously to just arc minute accuracy In Polar Alignment Wizard fixed movement labels at the bottom of the graphs when measuring Azimuth and Altitude steps 5 and 8 respectively The direction was sometimes wrong Added warning in compass direction step step 3 if the user selected points do not make sense Other refinements to the polar alignment state machine V2 00 June 14 2007 Build 30 Beta Added fine adjustment to backlash exerciser timing Added Magnifier window to Backlash Exerciser to provide a convenient magnified view of the edges of the zigzag pattern Bug Fix In Calibration wizard save RA Dec when clicking Next New features in Calibration Wizard Slew to Position and Nudge Scope Added on graph labels for time and arc seconds in Polar Alignment Azimuth and Altitude measurement graphs Made refinements to the appearance of the Polar Alignment Azimuth and Altitude measurement graphs Added a control to adjust the ti
135. er of teeth in the worm gear OT your MOUNT T YOU CONT Know mis nuMper ask your manufacturer Teeth in wom gear 725 A 4 i Worm Period Enter the number of teeth in your worm gear ask the manufacturer if you do not know PEMPro will calculate the exact worm period If you click OK PEMPro will use the calculated worm period If you click Cancel the calculated worm period will not be used Show Pulse Test Page Allows you to send test pulses to your telescope for testing When checked a new tab appears as below Its keyboard shortcut is the F7 key Wizards Setup Acquire Data Analyze Program Mount Refine AP Raw PE Pulse Test Move Mount Dec wi ran ll ohana eee Expected Tae Pulse Pulse Sum Pulse Duration Next mses Pulse Count 0 a 0 600 1 s 50 fl ow E 1 g Loop Continuously Always show last pulse Stat Test Pulses TIP If you are using a mount that is not on the general list or that must be programmed via the PEC playback Program Mount tab you can use this tool to find a good value for Pulse Modulo To do this you will need to know the mount s guide rate If you cannot determine the guide rate from the mount s documentation or from the hand controller if the mount has one you can use the Calibration Wizard to calculate it Start with a Pulse Duration of 10 msecs and generate 100 pulses and note how much the telescope moves in RA The amount that the mount should m
136. ern Hemisphere Min Star Brightness 1000 Max Star Brightness 100000 Sync Worm Cycle Log and Images Dir F Astrosave Test If you get an error connecting to the mount then check that the camera connects OK by manually trying to connect from your camera control program Once it connects manually PEMPro should also connect successfully Important Do not connect to the mount through an ASCOM hub such as POTH Make sure that the text field to the left of the Configure Scopes Mounts button says Celestron Telescope If not press Configure Scopes Mounts and change the ASCOM driver to be the native Celestron driver One other thing you will want to do is to make sure PEC is off PEMPro has convenient buttons to turn the PEC on and off In this step we want PEC off so press the PEC OFF button 1 00 a A Cycles Visible _ RA Aas Graph Scale x 50 RA Setup Acquire Data Analyze Frogram Mount Refine Start Binning 1 Subframe 24x 24 Then click the Acquire Data tab and press the Start button Setup Acquire Data Analyze Program Mount Refine Celestron s Binning fi M Always show last centroid Subframe 50x 50 XY in arc seconds If you have Ask for Filename and Comments when Acquiring Data checked in the Settings menu you will have an opportunity to change the default filename and add optional comments to the file Click he
137. ery similar so am comfortable with the determination that the reason for the poor performance of the original PEC curve was mostly due to the phase of the mount shifting before the curve was uploaded It could be that the mount clock running too fast or that the PC was running too slow Whatever the reason it can be corrected by phase shifting the curve then reloading the curve to the mount Luckily this can be done without reacquiring data Furthermore it appears at least in this particular telescope that PEC playback appears to function properly Meade LX200 GPS LX200 R LX200 ACF IMPORTANT PEMPro only works in equatorial mode Please make sure that you are using a wedge or other means to polar align and that Polar is selected in the mount s hand controller s Telescope Mount menu Alt Az is the default setting These directions apply specifically to the Meade LX200 GPS LX200 R and LX200 ACF PEMPro will be able to directly read write to the mount s PEC table with all firmware versions 2 0 and later however the procedure is different depending on the firmware LX200 GPS R ACF Firmware Version 4 0 and later LX200 GPS Firmware Version 3 0i and earlier Version 4 0 and later firmware PEMPro has some very nice features for the LX200 GPS R ACF series of mounts PEMPro can directly upload a PEC curve to either the normal or Factory PEC table with the firmware 4 01 or later Here are the steps you should follow Step 1
138. ess MX5C MX7C Fast Starlight XPress MX7C operated in fast mode MX7C Interlaced Starlight XPress MX7C operated in interlace mode Meade DSI Meade Deep Sky Imager RGGB High Quality Same as LISAA but uses a high quality algorithm Red Green and Blue Scale factors in percent to apply to each color in the debayer process Leave at the defaults 100 100 100 if you are not sure to what you should set these values X Offset X axis offset flag may be required by some cameras Y Offset Y axis offset flag may be required by some cameras Select File Click this button to select a raw single frame image to test the settings Test Every time you click this button two images will be created in MaximDL One image will be the converted color image from the settings above and the second is the monochrome version of that image Use this feature to setup the color conversion for your one shot color camera If you have Convert to Mono selected then all images in the Polar Alignment wizard will be converted to monochrome by this procedure 8 In this step the compass directions are determined PEMPro starts off by taking a snapshot image at the current position Then it moves the scope North and takes another image Lastly PEMPro moves the scope East and takes one final image Once done the first of the three images is displayed Locate a notable star and click it The next image of the three will display automatically Click the same star in
139. f each curve the color pen weight and pen style You can also adjust the amount of fading all curves and text description but the active curve gets The active curve is set on the Modify PE Curve tab Modify PE Curve Tab e PEMPro v2 5 Sel File Settings Tools Wizards Help Polar Align Wizard Star Finder Backlash Mount Peak to Peak PE 24 49 Arc secs File Peak to Peak PE 22 80 Arc secs PEMPro Peak to Peak PE 24 67 Arc secs Arc Seconds 8 00 lt All Cycles Visible In the Modify PE Curve tab you can make ibe RAAxis Graph Y Seale changes to any of the curves Start by Wom Cycles ners 1351 2307 selecting the curve to modify in the Active l CA Curve combo box field Setup Acquire Data Analyze Frequen Graph Modify PE Curve PEC Quigk Refinement PEC Table Data From Created PE Curve Active Curve Curve Phase Adjustment PEMPro Created Curve Fom EQNOD To Eowon e C Upload changes immediately to mount PhaseDelta 7 aml C Enable PEC Drawing with Mouse cous Oo E Tota Phase Adjustment EQMOD PEC File Scale Curve Scale Value Motor Ticks Secs pr os g Save Scope Connected Camera Connected On this tab you can make some useful modifications to the Active curve To set the active curve click the combo box and select the curve type Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine EQMOD
140. ge the movement direction to Forward in the Settings Summary dialog and press From Created PE Curve again Setup Acquire Data Analyze Program Mount Refine L 200 16 FEC Residual a a Clear PEC Periodic Error Table pieni 0 00 Raw Vale Accumiated PE To Mount To File This will load in the PEC data from the curve you just created You can also from this page load the PEC curve from the mount From Mount or from a file From File Once a curve is loaded you can write the PEC curve to a file To File or to the mount To Mount If needed you can also invert the PE curve Invert The Smooth button is reserved for future use It does not do anything at the moment So after loading the curve press the To Mount button to finally update the LX 200 s PEC At this point you can enable PEC on your LX200 Setup Acquire Data Analyze Program Mount Refine L 200 16 Read PE Curve From Created PE Curve Penodic Error Table Accumulated PE From Mount From File Process PE Curve Smooth To Mount To File Editing PEC Cell Data You can double click anywhere in the graph area and that will show and highlight the line in the table associated with that point on the graph Then if you double click the table entry that will bring up a dialog that allows you to manually edit the data This is what that dialog looks like Make your changes and press Close to exit the dialog Changed values
141. gle between the last snapshot and the spiral mosaic by clicking Snapshot or Spiral Field If you are not using the Video Interface you can also bring up a Histogram dialog that will allow you to set the black and white points of the image BST A GTO Mounts 400 600 900 1200 TOCP2 Control Box Frequently Asked Questions Installation and Preparation 1 The PEMPro V2 installer should check for the Microsoft Net Framework 2 0 but if not already installed you will need to install it At the time of this writing you can download it from here 2 4362 4BOD 8EDD CCRT TTT RTE Pe Rene Install ASCOM 4 1 or later drivers You can download from here http www ascom standards org downloads html IMPORTANT you must install PEMPro V2 from the Astro Physics CD that came with your mount for your license key to work Other Preparations Before Running PEMPro V2 Confirm that one of the following is installed eS a 6 MaximDL v3 22 MaximDL v4 50 or later CCDSoft V5 00 174 or later AstroArt V3 V4 or later Meade Autostar Suite if you want to use a Meade DSI or LPI Series camera Your webcam video camera software If you plan to run PEMPro s native video application Start on of the software applications above and connect to your camera to make sure the camera works by taking a quick snapshot image If you plan to run PEMPro s native video application please start it first from the Windows Startup menu Conf
142. gs Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash te me For best results read through these items before starting However you do NOT need to check them off to continue Polar Alignment Pre Start Check List o gt E Telescope is setup and is roughly polar aligned within 5 10 degrees The closer to true polar alignment the mount is the quicker excellent polar alignment will be achieved C Tripod or Pieris leveled as much as possible This will reduce the chance that multiple adjustments will be required in each axis c f your scope has GOTO capabilities make sure it is synched to a star or unparked from a known alt az position This does not need to be very accurate within maybe 5 degrees This will allow PEMPro to make moves to the correct part of the sky Take care that no cables are dragging Dragging cables can cause erratic measurements c Tum of dew heaters and dont stand or sit in front of the optical path Setup on grass i possible instead of concrete or asphalt Heat fram these sources can cause stellar distortion and erratic measurements C Make sure the telescope is focused well c While measurements are being made try not to walk near the scope This may cause the scope to bounce about Also make sure your CCD camera is not vibrating if it has a cooling fan Next gt Cancel Telescope Slew Scope Clon eha yr Distance o 15ardeg Scope Not Connected Camer
143. h Firmware 2 x or later Meade RCX 400 and MaxMount Meade Classic 16 Software Bisque Paramount GT1100S and ME Hardware required by PEMPro 500 MHz PIII or faster PC 2 0 GHz P4 or faster is recommended e 256 MB or more of RAM 512 MB or more is recommended e 5MB or more of Disk space e Monitor with 1024x768 or higher resolution and 64 000 colors 1280x1024 or higher resolution and 24 bit color recommended e CCD camera compatible with MaximDL V3 V4 V5 CCDSoft V5 or AstroArt V3 V4 Meade Autostar Suite and DSI Ill series camera or any video camera or web cam compatible with DirectShow this included the Phillips Toucam Pro series Phillips SP900c and all IC Imaging Source USB Firewire monochrome and color cameras No autoguider is required the main camera is used to acquire periodic error data e A compatible telescope or mount see above New Feature Summary The Polar Alignment Wizard tab uses electronic drift alignment a process using your webcam or video camera that helps you achieve the best possible polar alignment quickly and painlessly The PEMPro Video interface appication can work with any DirectShow or WDM compliant device including most capture cards and webcams like the Philips Toucam Pro and Meade LPI It allows you to use PEMPro with an inexpensive webcam without having to buy an expensive third party CCD control application The Star Finder tab is helpful if you have a small CCD field of view to loc
144. hat PrecisionPEC does by de rotating the data by the angle it reads from the CCDSoft tracking file It further improves the calculation by compensating for the scope s declination when the log was captured Click Next to continue In Step 2 enter the CCD Image Scale and the Declination of the star you intend to use PEMPro will automatically adjust for declination and camera rotation if you check De rotate Periodic Error Data Click Next to continue 2 PEMPro v2 0 F Astrosave PemPro Tests Imager log mB Step 2 of 4 Configure Settings Settings De rotate Periodic Eror data Paramount Type Model ome Wom Period secs 149 5904 Step 3 is optional You can use it to determine the camera angle but you can also change the direction later when creating a curve 2 PEMPro v2 0 F Astrosave PemPro Tests Imager log step 3 of 4 Detemine Orientation Step 1 Capture Star Trails Step 2 Select Star Trail Pattem You can skip this step if your setup has not changed Point your scope near to the meridian and 0 declination and press Start PEMPro will slowly move the telescope during the exposure Image Duration l in seconds 20 After the image has been taken select the pattem that best matches the star trails in a a aeaea the image Press Nest to continue Step 4 You re done Press Finish and the Cre
145. he curve will display Setup Acquire Data Analyze Freguency Spectrum Program Mount Refine Gemini L4 FE Curve PEC Residual ed ea Oe ten PEC Table Show Saved PEC Clear PEC cen Wael Num Offset Phase Value Count Arc secs Accumulated PE To Mount Ta File Curve Tweaking Sampling steps Phase seconds H f Guide Rate Alecenter Invert Curve ESN Scope Not Connected Camera Not Connected Once PEMPro is connected to the mount on the Setup tab the From Mount and To Mount buttons are enabled Also note that the firmware and guide rate are also displayed Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine Gemini L4 L PE Curve Fimware 1 34 GuideRate 0 50 PEC F From Created PE Curve PEC Table _ Show Saved PEC Clear PEC z Curve Tweaking Sampling 10 steps Phase 0 0 secs Arc secs Raped PE Scope Connected Camera Not Connected Once a curve has been created in the Create PE Curve dialog the From Created PE Curve button and all of the controls in the Curve Tweaking section are enabled Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine Gemini L4 PE Curve Fimware 1 34 GuideRate 0 50 From Created PE Curve PEC Table C Show Saved FEC Clear PEC SES t A Li E a E sl i 0 000 Normal 10 j West 1 Normal 39 West 1 Normal 29 West 1 sit
146. he following data Description Gear attached to the stepper Shaft drives the transfer gear Contact period of each tooth Period stepper stays as each microstep position Gear between stepper and worm drive Contact period of each tooth Period of rotation of each ball within the bearing Mounted on Worm shaft Contact period of each tooth Rotates once per Sidereal day Period Seconds 122 2 10 2 0 0095 366 6 10 2 170 478 69 10 2 180 478 69 Period Seconds 122 2 13 6 0 0095 380 2 13 6 225 638 2 13 6 135 638 2 Number of Teeth Comment 12 N A Sidereal rate is approximately 105 MA microsteps per second N A N A 47 N A 180 Number of Teeth 9 Comment N A Sidereal rate is approximately 105 NA microsteps per second 28 N A N A 47 N A 135 Gemini Level 4 These directions apply specifically to the Gemini Level 4 controller With PEMPro you can Turn PEC On Off when connected Read and display the current and saved PEC tables Upload a PEC curve to the current or saved PEC tables Save a curve to a file Read a curve from a previously saved file Clear the mount s PEC Adjust the final curve before sending it to the mount NOU BWNE Also 1 When you connect to the mount the worm period and phase are automatically determined from the mount PEMPro is automatically synchronized to the mount 2 Whenever you st
147. hese values are used to calculate refraction effects and sidereal time STEP Ja Setup or contin site details Degrees Minutes Seconds Latitude N af Caia TF A J A Longitude W 121 S a S 5 amp Mount N 196 85 feet 6120 Elevation meters i Temperature C 16 Step 1b Position or slew scope to near the meridian F your mount has GOTO capabilities press the Slew button to automatically slew the scope to the south Ff you are using a Geman Equatorial mount choose the side of the mount that won t cause the mount to flip the telescope when you later slew to the East or West for Altitude adjustments F stars are not visible at this declination you can move the scope north or south of 0 declination as long as the scope is still pointed near the mendian Degree Relative to Move West of Meridian Mardan Decination FE O Move East of Meridian 5 N 0 Altitude Show Hour Angle a 52 1 6 15h 45m J Azimuth 00 00 ai We 188 30 Slew Scope Siew E w Distance F 2 nw ancl i Scope Connected Camera Connected 7 The Camera Information page defines the pixel scale of the image and the camera angle You can enter the values manually import them from the Calibration Wizard or best of all use the Measure Now button It is recommended that you click Measure Now which will take an exposure with tracking stopped File Settings Tools Wizards Help PEC Polar Align Wizard St
148. how Hour An 3 2 A 52 6 Ra 16h O1m S Aaimuth Dec 00 00 f ie 188 34 Slew Scope Sew Distance F iSarcmin Scope Connected Camera Connected After the reference image comes up click on one of the bright stars PEMPro will mark the direction with an arrow how far you will need to move the star to polar align the mount s azimuth axis If the arrow goes off the screen you should adjust the star in the direction of the line and backup to the previous step to doe another measurement 2 PEMPro v2 0 3 Ef File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Adjust Mount s Azimuth r r rm oF Step 6 of d Azimuth Error Full Screen Step ba Press Reference Image to get a reference image Reference Exposure Image Settings Click on the brightest star PEMFro will display the direction and distance to move the star IF NEEDED slew scope to reposition the star or find a nearby brighter star Remember to press Reference Image again after slewing Step 6b Adjust mount s AZIMUTH until the star moves near to the end of the amow Press Take Image to view an image of the star position Take Image Continuous Telescope Altitude C Show Hour Angle 3 id 2A 52 06 Ra 16h 01m F i Aaimuth Dec 00 00 f Wm 190 30 Slew Scope B Siew Distance 5amrmin Scope Connected Camera Connected Next cl
149. ick Take Image If Continuous is checked PEMPro will continously take images Adjust the mount s Azimuth carefully until you have the star centered in the circle as well as possible You can compare the current image to the reference image by clicking Reference Image Make sure to click Current Image to go back to viewing th ecurrent position of the scope If you need a larger view you can click Full Screen which will use all of the screen except for the Windows Task Bar 2 PEMPro v2 0 E Ef File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Adjust Mount s Azimuth i re iF th Step 6 of d Azimuth Error Full Screen Reference Image Current Image Step ba Press Reference Image to get a reference image Click on the brightest star PEMPra will display the direction and distance to move the star IF NEEDED slew scope to reposition the star or find a nearby brighter star Remember to press Reference Image again after slewing Step 6b Adjust mount s AZIMUTH until the star moves near to the end of the arow Press Take Image to view an image of the star position Telescope Altitude C Show Hour Angle oe 2 2A RA 16h O1m 7 S Farh Dec 00 05 f BE 19147 Slew Scope Siew E T arcmin oie Scope Connected Camera Connected 12 Click Next again see picture below Press Slew to move the scope to the East or West about 30 60 degrees from the
150. icking Create PE Curve on the analyze tab 10 0 rs RA Worm Phase Minutes 2 All Cycles Visible gt ie uke BA RA Amis Graph Scale Total Time Phase Worm Cycles Samples x 12 50 0 49 00 01 08 1 149 h Click Yes to continue Create a PE Curve You can create a PE correction curve immediately after acquiring data or use the log file created in a previous session PEMPro places all log files in the directory specified in the Logs and Images Dir field on the Setup tab of PEMPro s main window When the create PE Curve dialog opens it may take a few seconds to calculate an optimum curve In most cases you won t need to do any modifications to the curve Advanced users may wish to add or remove fundamental frequencies to see how that effects the curve s fit the measure of which is the RMS Error in the upper right of the dialog Note The picture below is for illustration only It is not from an Astro Physics mount so the shape of the curve and worm period will be different from your mount PEMPro Create PE Curve gt RMS Error 0 181 WOT PE Periodic Error 437 43 Pals l FFT Waveform w 1 000 2 000 3 000 4 000 5 000 6 000 I 7 nnn Data Points RA Axis l x al 0 00 00 000 0 00 02 719 0 00 05 375 0 00 06 062 0 00 10 750 0 00 13 469 0 00 16 140 0 00 18 644 Initial Worm Phase Image Roll degrees eee peu Cancel _ Export Data mu om to
151. igned To continue click Next Telescope z Altitude Pa 52 20 RA 15h 45m y ie p Dee 00 00 187 29 Slew Scope Sew z a F i i min ka i J Scope Connected Camera Connected 5 Optionally check off the items in the Pre Start checklist a The telescope should be roughly aligned although it can be off by roughly 10 degrees or more and this procedure should still work b If possible level the tripod or pier as much as possible Doing so will reduce the number of Altitude and Azimuth iterations to achieve best polar alignment c Synch to a star If you cannot find a known bright star position the scope near where you think the bright star should be and use PEMPro s Star Finder feature It will perform a spiral search around your current location Once you find the star in one of the frames you can slew to it by double clicking that frame Note that if polar alignment is not accurate as is probably the case slews after synching will not be very accurate However the slews do not need to be accurate PEMPro just needs to be able to position the scope to roughly to the correct part of the sky e g South near O declination After accurate polar alignment is achieved you will want to synch again on a known star and once again Star Finder might be able to help you find a bright star that is not in your field of view but nearby Click Next to go to the next page Et PEMPro v2 0 File Settin
152. ince there are 600 cells then cells 1 and 600 2 and 599 3 and 598 etc are swapped Here is a picture showing an example of reversing a LX 200GPS not RCX400 curve Curve Reversed m Smooth Does a very modest smoothing of the curve The Smoothing consists of doing a weighted average of each cell with its the two nearest neighbors Scale Scales the curve by the factor in Scale Value Clear PEC Fills the entire PEC table with O s IMPORTANT After making adjustments to a PEC curve with any of the above buttons you will need to write it to the mount with the To Mount button Refining the Periodic Error Curve Because of various reasons the very first curve you program into the mount may not result in a perfect result To produce a more accurate curve the original curve with the mount s PEC off is refined by adding to it the residual PE recorded by PEMPro with PEC on This procedure may be done a number of times to obtain the best possible accuracy For a case study which involves refining curves go here Focusing with the Hand box Window The hand box window has buttons to move the focuser in and out The Meade Hand Box Speed can be set in the Focus menu as shown to the right There are four Speeds available Slow Medium Medium Fast and Fast There are also mies Cil 1 short cut keys CTRL 1 through CTRL 4 which allow you to change speed medium MS Cirl42 without directly accessing the menu Medium Fast Ctrl
153. ings for Short exposures less than 1 second and long exposures 1 second or longer so you may need to change the settings appropriately if Use Custom Settings is checked Polar Align Wizard PEMPro uses the polar drift alignment method to help you achieve good polar alignment This method although very accurate has a reputation of being difficult PEMPro takes the tedium out of this method Although you can use this wizard if you do not have a GOTO mount if you have a GOTO mount PEMPro can make Polar Alignment less painless If you do not have a GOTO mount click here for the procedure Polar Alignment Wizard Procedure Goto mounts Note The procedure below sometimes indicates to point the telescope to the South This applies only to users in the Northern Hemisphere If you are in the Southern Hemisphere please substitute each occurrence of South with North 1 Select the Setup tab of the PEC page the initial page displayed when PEMPro starts 2 Setup Camera a Select the camera control program you wish to use in the drop down list box to the right of the Connect Camera button b It is best if you already have the camera control program active and the camera connected to it c Focus the telescope on a Star d Make sure that the Min Star Brightness and Max Star Brightness are set to reasonable values e g 1000 30000 for CCD or 100 255 for Video You can later tweak these settings as needed while the Wizard is me
154. inutes E2 oe recor Aa Age Groh YSoele Total Tre Marti Wanta x 00 amp 02137 25061 3 1351 im ane Ew a ni Tanasa RA Worm Phase Minutes 2 FA recorr J RAAS Groh Y Seale Total Tre Veta ces Vom Cpctes See x WH 5 02107 21915 3 1351 Setup Asare Date Anatyee Frequency Sosctun Poyon Mourt Rafe EQM00 eee Sup Aoqure Dats Angier Frequency ostun Poyon Mout Refine EIMOO PE n 7 F7 eee Ihi ON PEC PEC Quick Retinersent PEC Table Cota Gah Mody PECuree PEC Quick Ritinersart PEC Table Deta FromCmstedPEGuve dcovecuve From Custed PECuve sve are areri Fon econ Teamo l2irecee Ms ae Ge G Creer Fon Eamon _Tocawco_ a estate up pany ay z s Phare Ceres TR for me Jl To Fie _ d Emse PECC aao 5 Mem Tax v Je Fe I To J Tote Frare Adee i Maw Tow Sect ______ load Seve Sonne Commented Reverse Flips the curve end over end Available for completeness but probably not useful unless using a Northern Hemisphere curve in the Southern Hemisphere or vice versa because the mount movement direction gets reversed in that case Phase Adjustment Allows fine adjustment of the curve s phase before uploading PEC Quick Refinement Tab This tab allows you to make an easy refinement to your PEC curve Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine EQMOD PE Curve G
155. ion Build 42 Latest Release Version Build 37 Latest Hot Fix Build 41 CCDWare Support Forum If you encounter problems and need support this will take you to the CCDWare support forum About Shows PEMPro s version information Problem Cannot Connect to the Telescope When I launch the telescope connection have a message which said Connect Failed Type Mismatch Cannot Connect to the Camera Solution If you are using ASCOM 1 Make sure you Nave installed the latest ASCOM platform installed http www ascom Standards org downloads html 2 Make sure you have installed any updated drivers PEMPro should warn you if they are needed but it does not hurt to check http www ascom Standards org downloads html 3 If you need to update a driver that does not have an installer then do not rename the old driver Copy the new driver directly on top of the existing driver 4 Run the telescope s setup dialog in PEMPro you can click Setup Edit ASCOM Driver Settings Make sure that the COM port is set correctly and adjust any other settings that may apply to your Specific setup or location This message is coming from the ASCOM driver Unfortunately the ASCOM driver is probably getting confused by the difference in the way numbers are written use of instead of for the decimal point in regions outside the United States To fix this you will need
156. irm that you can connect to your telescope with your planetarium program e g TheSky or SkyMap Pro Entering the PEMPro V2 License Key When you run PEMProV2 for the first time a dialog will pop up asking for you to enter your license key The license key can be found on the CD case with the software that came with your Astro Physics mount You must enter the license key in order to use PEMPro PEMPro Registration Please locate the PEMPro V2 license key Itis printed on a label of the software shipped with your Astro Physics mount Please enter it below Please enter your PEMPro V2 License Key Enter Standard Key Continue Once the license key is entered you can optionally register your copy of PEMPro V2 and get a free Standard License Key which is the 5 line license key sent to paid commercial customers of PEMPro The Standard License Key will allow you to do a fresh install with any build of PEMPro V2 You can still upgrade to the latest build even without a Standard License Key The only advantages of the Standard License Key is that any version of PEMpro can be installed on a fresh computer and the PEMPro Registration dialog will no longer pop up when you start PEMPro To get a Standard License Key enter your name and a valid e mail address and click Get Standard Key Once you receive the Standard License Key just click Enter Standard Key and copy and paste the license key into the dialog when asked
157. is shifted to the right by about 10 12 seconds 4 5 cells and reloaded But could such a small shift cause PEC to be so poorly corrected say yes To prove this theory used the refine curve tab of PEMPro to try to reverse engineer the curve with PEC on the one with 17 51 arc secs PE In the graph below the blue curve is the PE curve with PEC off and the red curve is the exact Same curve shifted right then created a new green curve with Subtract Curves which is the difference of these curves If the green curve looks like the 17 51 arc second PE curve then it pretty much confirms that the residual PEC in the that 17 51 arc sec curve was caused by a phase shift in the curve written to the mount _ Peak to Peak PE 30 49 Are secs RMS 7 41 Arc secs Peak to Peak PE 30 49 Arc secs RMS 7 41 Arc secs Peak to Peak PE 13 79 Arc secs RIMS 3 34 Arc secs So below is pictured the reverse engineered curve green curve above red below on the same graph as the the 17 51 arc sec measured curve blue curve They look very similar so phase shift was likely the culprit for the poor performance of the first curve It is amazing what just 10 12 seconds of error does to the corrected PEC curve Peak to Peak PE 13 79 Arcisecs RMS 3 34 Anc secs Peak to Feak PE 17 57 Arc secs RMS 3 68 Afc secs Reverse Engineered Curve Measured Curve Conclusion The reverse engineered curve and the measured curve look v
158. it s position press this button You might use this button if you have changed monitors and PEMPro no longer is visible on the screen You can also reset PEMPro s screen position by pressing the CTRL key when PEMPro starts Reset Full License If you should ever want to remove the full license from your PC press this button Delete PEC Simulator Registry Settings Press this to reset the settings of the PEC Simulator PEC Simulator The PEC Simulator works with PEMPro to simulate the periodic error in a mount the tool is rather crude but still useful in helping understand how PEMPro works and some interesting details of PEC on your mount To use it you must first start the PEC Simulator from the Windows Start menu PEC Simulator S PEMPro Beta C PEMPro Reset Tool When the PEC Simulator starts for the first time you might see this security warning GA PEMProsim F Source PemProsco pesim bin Ioj x File Config we Raw PE m Movements Current Worm Phase Current PE Walue Y Scale farc secs W Raw PE PEC Table Windows Security Alert To help protect your computer Windows Firewall has blocked some features of this program Do you want to keep blocking this program pa Mame PemProSim Publisher Sinus lmaqging PEC Lett PEC Mur lected PE RE Keep Blocking Unblock Ask Me Later Windows Firewall has blocked this program from accepting connections from the Internet or a netwo
159. k Windows Security Alert To help protect your computer Windows Firewall has blocked some features of this program Do you want to keep blocking this program Sp Name PEMPro V2 Publisher Sirius Imaging Keep Blocking Unblock Ask Me Later Windows Firewall has blocked this program from accepting connections from the Intemet or a network If you recognize the program or trust the publisher you can unblock it When should unblock a program You will see the PEMPro box in the Video Interface turn green Seles Track Tracking radius The Mount box will turn green when you connec the mount At that time the Move buttons will become active A gt PEMPro Video Interface File Video Help PEMPro Calibrate Find Star Track Arc Sec pike Move E a 196 i Tracking radius z __ Degrees Cursor Pos Y Tracking Enabled me 135 111 1740 NOTE If PEMPro will not connect to the Video Interface PEMPro and the Video Interface communicate with each other using the UDP protocol on ports 9123 9126 In some cases you may need to configure your firewall or virus application to allow traffic on these ports even though neither PEMPro nor the Video Interface ever send packets off the computer just between each other on the same computer Even then there needs to be at least one network active on your computer or else the network protocol stack might not work This could happen just be dis
160. l Auto Find If checked PEMPro will attempt to locate periodic fundamentals in the data when the Create PE Curve button is pressed Usually you will not want this item checked but if you wanted to force certain fundamentals to be used check this item and set the fundamentals in the Mount Configuration Dialog Keep Main Form on Top Forces PEMPro to stay on top even if you click to another application Restore Last position when starting If checked PEMPro will restart in the same screen position and size as when you last closed it down You can force PEMPro to start in the windows default position by pressing the CTRL key when PEMPro is starting You can also reset this option with the PEMPro reset tool Ask for File and Comments when Acquiring Data If checked PEMPro will prompt for a filename and comment before starting an Acquire Data and again for final comments after stopping Night Screen Mode If checked PEMPro will use colors in some views that will show up better when viewed with a red plastic screen in front of the PC Tools 2 PEMPro v2 0 File Settings MELS Wizards Help Worm Period Calculator F H Show Pulse Test Page F7 Worm Period Calculator Brings up the worm period calculator Its keyboard shortcut is the F6 key PEMPro Worm Period Calculator This tool will help you quickly and accurately calculate the worn period of your mount All you need to know is the numb
161. le checkbox Then as you move the mouse over any part of the image it will be magnified in the small box in one of the corners The box can be placed at any of the four corners by changing the setting of the Position combo box You can use the Magnifier to closely examine the declination direction transitions Interpreting the results There are really three cases that will help you determine how to adjust your backlash A Under corrected Backlash Under corrected backlash has flattened peaks at each direction change You should increase your scope s Dec backlash setting if you see this pattern B Over corrected Backlash Over corrected backlash has jumps at each direction change You should decrease your scope s Dec backlash setting if you see this pattern C Properly corrected Backlash When backlash is properly corrected the peaks look sharp at each direction change This indicates your telescope will exhibit very little if any guiding degradation because of Dec backlash Video Interface PEMPro V2 provides a way to use a low cost webcam or video camera to measure and adjust periodic error polar alignment and backlash To use the video interface application start it from the Windows Start menu 2 PEMPro Help Z PEMPro V2 PEMPro V2 Reset Tool W PEMPro Video Interfaye C Scope Simulator i i Track esi E ee Arc secipix Tracking radius C Tracking Enabled A PEMPro Video Interface
162. lestron CGE CPC and Nextstar Mounts Mounts with Gemini Level 4 Meade LX 200GPS and LX 200R with Firmware 2 x or later Meade RCX 400 and MaxMount Meade Classic 16 Software Bisque Paramount GT1100S and ME Running PEMPro for the first time If you have not used a previous version of PEMPro on your PC when you run PEMPro for the first time you will have to configure your mount telescope In this case PEMPro will offer to start the Mount Quick Configure Wizard x P Mo Telescope Mount is defined Would you like to open the Telescope Mount Quick configure Wizard a TF you click Wo vou can later configure a mount From the Setup page or the Wizards menu r PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 1 Description Enter a descriptive name or phrase for your telescope mount This name will appear in the scope drop down list box on the Setup tab in PEMPro s main form My AP GTO Mount Enter any descriptive name for your telescope mount and click Next Here select the type of mount telescope that you have If you don t find your mount in the list then select Other and follow the directions here PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP Mount Type Telescope Mount Type ff you dont see your mount type select Other iP 900 1200 GTO Rev G and later AP 900 1200 GTO Rev G and later AP MachiGTO AP GTOCP3 Controller Celestron DFL Losmandy G 11 Losman
163. like an ellipse but the error is so small you might not be able to actually tell that the gears are not perfectly circular Now because each gear is an ellipse it causes the mount to move faster when on the longest diameter of the ellipse and slower on the shortest edge If you where to chart the motion produced by the gear it would look like a sine wave with a specific duration Most often the gears also rotate an exact integral number of times in one worm period This ratio whether it is an integral or not is sometimes called a fundamental So if the worm period were exactly 480 seconds and a gear rotates 10 times in each 480 second interval it has a Fundamental of 10 because it would produce a sine wave that repeats 10 times in 480 seconds In actual time that would mean each rotation of the gear takes 480 10 48 seconds Most mounts have at least one fundamental that is the period of the worm itself i e the fundamental 1 Setup Calibration Wizard To access this wizard connect to your mount and camera then click Wizards Calibration Wizard 2 PEMPro v2 0 Beta File Settings Tools Qiiireiger Mount Wizard F8 Calibration Wizard F9 PEC Polar Align Wu r After doing so you will see the first page of the wizard e PEMPro v2 0 Beta Eje mE PEMPro Setup Calibration Wizard a Step 1 of 4 Position Scope Point your telescope ata Magnitude 5 8 star near Declination 0 and just
164. load it to the mount with the Meade PEC Utility Method 2 is preferred and the remainder of this section applies to using it First after creating the PEC curve go to the RCX 400 tab and press the From Created PE Curve button Note that the curve will be inverted if the Movement Direction in the Settings Summary is set to Reverse If you don t want the curve inverted change the movement direction to Forward in the Settings Summary dialog and press From Created PE Curve again Setup Acquire Data Analyze Frogram Mount Refine RCX 400 Firmware 2 0e Oct 18 2005 Periodic Error Table Bo Sheer FEL Smooth This will load in the PEC data from the curve you just created You can also from this page load the PEC curve from the mount From Mount or from a file From File If you loaded the PEC curve from the mount you can display the factory PEC curve by checking the Factory PEC checkbox Once a curve is loaded you can write the PEC curve to a file To File or directly the mount To Mount Again it is recommended to use the To Mount button At this point you can enable PEC on your LX200GPS from the Meade Hand Box utility IMPORTANT If you are in the Southern Hemisphere check Southern Hemisphere on the setup page If you are in the Northern hemisphere make sure this checkbox is cleared Setup Acquire Data Analyze Program Mount Refine RCX 400 PE Curve Firmware 2 0e Oct 18 2005 PEC Residual S a Raw Val
165. ls Wizards Help PEC Polar Align Wizard Star Finder Backlash Move mount to South for Azimuth Measurement Step 4 of 9 if your mount has GOTO capabilities press the Slew button to automatically slew the scope to the meridian If you are using a German Equatonal type mount choose the side of the mount that won t cause the mount to flip the telescope when you later slew to the East or West lf your scope cannot slew then manually point it approximately South North if you are in the Southern Hemisphere and as close as possible to the Celestial Equator Azimuth Measurements Move West of Meridian Move East of Meridian Degrees Rlelstive to Mendian Telescope Altitude C Show Hour Angle E 2A 52 03 Ra 15h 45m i S Azimuth Dee 00 00 IS 197 09 Slew Scope B Tew gt f Distance W rr eT 5amrmin Scope Connected Camera Connected 10 In this step PEMPro will Measure Azimuth Error a Click Start Measuring and wait for a couple minutes for the trend line to stabilize If PEMPro is having trouble locking onto the star move the scope to a new field of view using the buttons in the Slew Scope field at the bottom left of PEMPro You do not need to stop measuring while the repositioning the scope PEMPro will automatically try to re acquire a star b Once the trend is established you can manually adjust the mount based on PEMPro s on the azimuth alignment error that displays a
166. make further adjustments as needed Raise Altitude Axis 25 6 Arc mins Drift Scale 2000 Ell C Show adjustment in arc seconds farc secs Telescope Altitude Atelier sd fi ia o aes Slew Scope n Sew E Distance lac nin Scope Connected Camera Connected 10 Click Next one more time to reach the Finished page Here you can exit or choose to redo the Azimuth or Altitude measurements 2 PEMPro v2 0 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Finished You have completed a polar alignment run If you would like to exit please click Finish lf you would like to remeasure Polar alignment of either axis please click one of the buttons below Redo Azimuth Measurement Redo Altitude Measurement Ce Jr Altitude Telescope g a 52 24 RA 15h 45m id a Azimuth Dec 00 00 186 17 Slew Scope Siew lE m _ Dister Sarcmin Scope Connected Camera Connected Backlash Exerciser This tool allows you to assess the Dec backlash characteristics of your mount It works by turning off RA tracking and making a series of alternating North and South moves This produces a zigzag pattern like shown in this snapshot 2 PEMPro v2 0 File Settings Tools Wizards Help erre iT ee ee PEC Polar Align Wizard Star Finder Backlash
167. make the image 1 2 the size in both height and width The actual image size and download time might be as much as 1 4th as much as when unbinned i e binning is 1 Press the Measure button to get started This will stop mount tracking and start an exposure A window will pop up when done and you will need to click on the start and end of a star trail This will determine the pixel scale and camera orientation Next set the Overlap Duration and Max Images Press Start to begin the mosaic process The Start button changes name to Stop when running see picture below so click it again to stop the process Once the mosaic is displayed you can click on any one of the subframes and the scope will Slew to that star field i y Ale 3 Star Finder 7 TE Dark arc mins pas TAE E z RA ogh A m Subtract Width Overap j Percent a pec Sees Hegh on o E A Measured e es Move N irist n Images a Frame Use Scale WJ Widths From Main Pas Measure Stop Clear i Scope Connected Camera Connected You can also click Snapshot in the Telescope group box to take a quick snapshot at the current telescope position The Duration field s value and the Dark Subtract Images are used for Snapshots You can also move the scope 1 4 1 2 or 1 full frame in any direction by setting Frame Widths and then pressing N S E or W North South East or West respectively Lastly you can tog
168. mer interval for Polar Alignment Azimuth and Altitude measurement graphs Finished last two steps of polar alignment wizard Added Tracking box size to polar alignment wizard V2 00 May 23 2007 Build 29 Beta AstroArt Close created image windows Decreased star minimum S N from 10 to 3 so stars are more easily detected CRITICAL FIX Fixed potential wrong axis chosen as declination axis in Pole align Wizard Added automatic logging to Polar Alignment Wizard for better problem analysis Increased accuracy of Image scale calibration in Polar Alignment Wizard and Star Finder Automatically stop Alt Az alignment measurements after 5 minutes Find Binning setting is now used for Find North South East West images Derotate angle is now being used V2 00 May 12 2007 Build 28 Beta The checkbox for Advanced Configuration Pulse Dynamics was hidden underneath a group box Moved it to the front Changed the clipping range so that the background is brighter in the Pole Align Calibration image when it comes up Changed the way the Pole Align Calibration works The entire exposure now occurs with tracking disabled This should result in a more accurate image scale measurement Corrected the calculation of image scale now includes compensation for declination in the Pole Align Calibration Improved the robustness of the backlash exerciser Also fixed relay timing V2 00 May 6 2007 Build 27 Beta Updated minimum ASCO
169. n TheSky Telescope Options Tracking 5 Star Trail Viewer Star Trail Measurement Summary File view Hep Average of Measurements P Pl P Distance Pixels Arc sec Pixel Image Angle wvesef S Measurements Start 4 891 000 Y 522 000 gt 760 00 Background 704 91 E SS ee Now in the above image you can click the start and end of a trail and an entry will be added in the table You Should do at least three stars If you make a mistake click the red X in the first column When done press the Save and Exit button Star Trail iewer Star Trail Measurement Summary File View Help Average of Measurements a j E FFI P Distance Pixels Arc sec Pixel Image Angle Ea Aee 252 O 107 f aso Sethe CH EM Measurements Stark End Distance Angle x fo2 00 406 00 1030 00 423 00 2fo oe 3 50 10593 000 Y 365 000 gt 762 00 Background 708 61 After the StarTrailViewer application closes click Next to continue from Step 2 IMPORTANT Make sure to turn tracking back on before proceeding to Step 3 If you forgot the Calibration Wizard will remind you to do so In Step 3 the autoguider axis and guide rate are determined It is recommended that if you can use the camera relays you should use that at the movement method An exception to this would be for mounts that use the Astro Physics GTOCP3 controller the Gemini Level 4 controller Meade LX200 GPS Meade LX200R and Meade RCX 400 For these m
170. n the Settings menu you will have a final opportunity to add comments to the file or delete the log file and start over If you don t delete the file you will be prompted to go directly into the create curve dialog txt lol x E PEMPro v1 50 PemPro 2006 02 12 175951 1 File Settings Tools Wizards Help 5 0 0 0 7 and eo KN x fas THE Y Would you like to immediately analyze and create a PE Curve 50 BAAR i If you select No you can do this later by dicking Create PE Curve on the analyze tab w GC O o a afi i im lt 10 0 PEC OFF aes RA Worm Phase Minutes All Cycles Visible gt Current Worm RA RA Ans Graph Scale Total Time Phase Worm Cycles Samples h Click Yes to continue 4 Create a PE Curve You can create a PE correction curve immediately after acquiring data or use the log file created in a previous session PEMPro places all log files in the directory specified in the Logs and Images Dir field on the Setup tab of PEMPro s main window When the create PE Curve dialog opens it may take a few seconds to calculate an optimum curve In most cases you won t need to do any modifications to the curve Advanced users may wish to add or remove fundamental frequencies to see how that effects the curve s fit the measure of which is the RMS Error in the upper right of the dialog PEMPro Create PE Curve RMS Error 2 088 Periodic 12 6 25 5 Periodic Error
171. nalyzing the resulting log file Image Scale is used to calculate actual periodic error and ultimately for calculating the pulse durations when playing back the fitted periodic error to your mount If you are unsure that it is correct please use the Setup Calibration Wizard Setup Acquire Data Analyze Program Mount Refine Start Binning fi M Always show last centroid Adjust for Drift Drift 0 00 Subframe 50 50 AY in are seconds IM Adjust for Drit Y Drift 0 00 Num Time worm Cycle wormPhase Centroid Y Centroid Max Pixel Exposure Time seconds 0 11 Exposure Delay Seconds 2 00 Image Scale Arc 5ecs Finel 0 891 Exposure Time Typically the shorter the time the better but if it is too short a time the star brightness might fall below the minimum brightness you set on the Setup page Exposure Delay Typically set to 0 1 1 0 seconds You may want to use a longer delay if you have a slower PC and the user interface seems sluggish Binning Typically you will only want to bin if you are very much over sampling the seeing 0 3 arc secs or less image scale IMPORTANT If you don t use 1 for binning make sure you adjust the image scale to match it is not automatically updated Subframe When you press Start PEMPro takes a full frame image to locate a suitable Star It looks first in the center of the image then outwards for a star between Minimum Brightness and
172. need to run this wizard if you are analyzing data previously collected Some of the settings established include e Telescope declination e Camera tilt angle e Which axis of the camera corresponds to Right ascension e Image Scale e Telescope movement direction Before starting the Calibration Wizard you should center a 6th 8th magnitude star in the center of your CCD camera The star should be just west of due South and at 0 degrees declination or higher if you are in the Northern hemisphere If you are in the Southern Hemisphere the star should be just West of due North and 0 degrees declination or lower In either case it is best to pick a star within 45 degrees of the celestial equator in Northern hemisphere O lt declination lt 45 in Southern Hemisphere 0 gt declination gt 45 Make sure that Adjust Data for Declination is checked in the Settings Menu While you are at it also make sure that De Rotate Data is also checked If either is not checked then enable them PEMPro v1 60 File Settings Tools Wizards Help Settings Summary FS w De Rotate Data w Adjust Data for Declination Calibrate Images when Acquiring Data 4 x Disconnect Scope on Disconnect w Disconnect Camera on Disconnect w Keep Main Form on Top y Restore last position when starting l Ask for Filename and Comments when Acquiring Data MaximDL CCD If you do not have the latest version of the Celestron ASCOM driver a
173. ni Level 4 N A SkyWalker N A She ee as G 11 Stock N A Gemini Level 4 360 N A SkyWalker 360 N A el ee ee See HGM 200 Stock 360 239 3446959 Yes N A N A CPC 800 GPS XLT CPC 925 GPS XLT CPC 1100 GPS XLT Requires Wedge Requires Wedge NexStar 8 GPS NexStar 9 1 4 GPS NexStar 11 GPS Requires Wedge Requires Wedge Requires Wedge Stock Gemini Level 4 SkyWalker G Xo e z 00 Cl 700 Gemini Level 4 360 239 3446959 N A SkyWalker 360 239 3446959 N A 360 _ 239 3446959 N A Gemini Level 4 360 239 3446959 N A SkyWalker 360 239 3446959 Yes N A N A HGM Titan ee ail SS has Ss a ss EE a ae a Wedge Required Meade except for MaxMount EN 7 jesse WA T Coo es o e S f N A 2xandiater_ 180 478 6893918 Yes Yes PEC Tool N A 2xandiater 180 478 6893918 Yes Yes PECTool N A 2x and tater 180 478 6893918 Yes Yes PEC Tool N A 2xandiater_ 180 478 6893918 Yes Yes PEC Tool N A 2xandiater_ 180 478 6893918 Yes Yes PEC Tool N A 2xandlater 180 478 6893918 Yes Yes PEC Tool C es S e S e PEC Tool PEC Tool PEC Tool PEC Tool PEC Tool S Pe ee ee eee PEC Tool PEC Tool PEC Tool PEC Tool SSS ee S e ME DAOU 652 Yes Coming Coming Mount II MaxMount 16 Coming Coming es ee ee es a oo eee O eee eee Mountain Instruments MI 250 Gemini Level 4 239 3446959 Ma
174. nt This name will appear in the scope drop down list box on the Setup tab in PEMPro s main form My new AP Mount Enter description here Press Next gt to continue Select the mount that you are using from the drop down list in Step 2 If you are not using an Astro Physics mount but have the GTOCP3 controller then select AP GTOCP3 Controller PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 2 Mount Type Telescope Mount Type If you don t see your mount type select Other AP 9001200 GTO Rev G and late Emish Click Next gt to continue PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 3 ASCOM driver Part 1 If your mount has an ASCOM driver then check Use ASCOM Driver and select the driver Do not connect through a hub like POTH which M Use ASCOM Driver may cause timing problems in some cases If Select ASCOM Driver your mount does not have an ASCOM driver then ignore this step a Part 2 If you haven t already configured the COM port and other settings then click the Edit Driver Settings button and do so Edit Driver Settings enh When Step 3 is reached the Astro Physics driver will be automatically selected The next thing you should do is verify your ASCOM driver is setup is OK by clicking Edit Driver Settings At the time of this writing the latest ASCOM Astro Physics driver is 4 1 25 and its setup page looks like this look at the lower l
175. nt East West settings Wet o w Use ASCOM Driver Basic Configuration Image Scsi Erc 5ec poe Worn coyote parod Secs Pulse Modula 2 meecs For ha l g Seconds between Playbeck Cormrechons Pulse Phase PE Fundamental Frequences 1 2 3 4 5 6 11 12 13 20 23 24 25 27 4445 a ee ASCOM Meade Tel Description C sdsds C Paramount ME C Test E AP1200 GTO C Simulator Fa wann E Meade RC Paramount Other AP 900 12 The Sky Te Astro Physi Simulator ha A T Riec Ww 1 000 1 000 1 000 2 500 1 000 1 mh Scope Fee it Worm e 1436 07 149 59 1436 07 302 90 239 4 470 CO Pulse Modulo 10 00 10 00 10 00 10 00 10 00 ELEL Pulse Pad E 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 00 0 00 he A ee 1 00 1 00 1 00 1 00 1 00 1 00 1 00 1 00 1 00 1 00 1 net ne Pulse Pha 1000 00 wy 1000 00 2000 00 1000 00 1000 00 TO ne i gt Mount Scope Description Enter a text description of your mount or telescope The description will appear in the drop down list box to the right of the Connect Scope button on the Setup Page see Figure 1 Use ASCOM Driver Check this box to enable the ASCOM Driver button Click that button to select your telescope In most cases
176. nt Wizard The first thing you must do is to create an instance of a Celestron mount in PEMPro The easiest way to do that is with the Mount Wizard Press F8 or go to the Wizards Menu and select Mount Wizard PEMPro v1 60 Fie Settings Tools Wizards When the Mount Wizard Step 1 comes up enter a unique name for your mount When you exit the Mount Setup wizard the name you type will appear in drop down list box to the right of the Connect Scope button on PEMPro s setup tab PEMPro Mount Quick Setup Wizard K ioj xj Mount Quick Setup Wizard STEP 1 Description Enter a descriptive name or phrase for your telescope mount This name will appear in the scope drop down list box on the Setup tab in PEMPro s main form Celestron CGE1400 ote Enter description here PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 2 Mount Type Telescope Mount Type If you don t see your mount type select Other Leestron AP 90071200 GTO Rev G and later AP Mach1IGTO AP GTOCP3 Controller Losmandy G 11 Losmandy G 11 Gemini Click Next gt to continue PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 3 ASCOM driver Part 1 If your mount has an ASCOM driver then seg check Use ASCOM Driver and select the driver Use ASCOM Driver Do not connect through a hub like POTH which may cause timing problems in some cases If Select ASCOM Driver your mount doe
177. nt and camera then the Connect buttons in PEMPro will turn green and text changed to say disconnect and in the Video Interface the PEMPro and Mount buttons will turn green as shown below The Move buttons will be enabled so you can move the mount at the currently set guide rate amp PEMPro Video Interface File Video Help Arc Seconds PEC OFF RA Axis XxX o A Setup Acquire Data Wom peftt secs z Calibrate Find Star Track y Min Star Brightness Acquiing meere g Cursor Pos Log and Images Dir s C Tracking Enabled 14 93 deg Scope Connected Camera Connected Note If you ever see the dialog on the right pop up when AstroVidTools you Start the video application then go into the menu setup and Click on Bad Pixel Remover Once in there clear out the Bad Pixel list and click Close Not loading last bad pixel list Device type has changed Next click the Setup menu item to select your video camera and resolution A PEMPro Video Interface Video Calibration Values Bad Pixel Remover Enable Show Crosshairs Show FrameCount Cleanup Integrated Exposures Enable Calibration Logging The actual setup window is here amp AstroVidCam Setup Video Configuration Video Source Philips ToUcam Pro Camera Video lv boernes 2 See 640x480 vuv Close If you need to get to the manual settings of the camera you can click Properties in the Video m
178. o You must still upload the curve to the mount by clicking To Mount before the mount will be able to use the drift change 4 This is the drift compensation value Feedback on this feature has indicated that the adjustment has to be made by trial and error so change the value upload the curve to the mount and adjust again if needed Again this just affects the curve in PEMPro You must still upload the curve to the mount by clicking To Mount before the mount will be able to use the drift change To recap the general procedure 1 Upload your PEC curve to make Sure PE is lowered 2 If PE increases invert the curve and upload again 3 If drift is present try using drift compensation Make sure to check Drift Compensation and upload the curve after you make a change It may be trial and error until you eliminate drift but this new feature should help you reach that goal Meade LX 200 Classic 16 IMPORTANT PEMPro only works in equatorial mode Please make sure that you are using a wedge or other means to polar align and that Polar is selected in the LX200 hand controller s Telescope Mount menu Alt Az is the default setting These directions apply specifically to the Meade LX 200 Classic 16 These directions do NOT apply to the 8 10 and 12 LX 200 Classic models So to use this procedure please follow these steps Step 1 Make sure the LX200 Classic 16 is selected as the mount type in PEMpro s Mount configur
179. o Interface e Enhancement In Video Interface added option to manually select calibration star e Enhancement In Video Interface the Image Scale and Image Angle can noiw be manually entered e Enhancement In Video Interface added dark frame subtraction e New Feature Added SiTech mount type SiTech Mount is automatically synchronized when the Synch button is pressed and when an Acquire Data is started V2 50 September 3 2008 Build 62 beta e Fixed problem with EQMOD installation being required e Added a menu item to do installation of proper EQMOD version for use with PEMPro V2 50 August 31 2008 Build 61 beta e Fixed 60 day license problem that prevented old trial users from getting another 60 day trial V2 50 August 30 2008 Build 60 beta e New Feature New Frequency Spectrum tab shows the spectrum of PE data without having to use the Create PEC Curve dialog The graph can optionally display mount fundamentals bases on files read in from the Fundamentals directory in PEMPro s install directory You can even add your own files if you wish 20 PEMPro v2 5 F Astrosave PemPro Tests Bruce Feagle EQMOD PE data PE 2 23Aug08_FOMOD t O gt lt File Frequency Spectrum j Total Time Motor Index Wom Cycles RA Sample Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine EQMOD Show Known Mount Fundamentals Integer Fundamentals E Check ALL Uncheck ALL im Known Mo
180. o cat ana gent Normal 29 05x 120 Ag West 1 1 Normal 39 Curve Tweaking sampling 10 steps Scope Connected Camera Not Connected Here is a Summary of all of the controls From Created PE Curve loads a PE curve that has just been created or loaded A previously created curve ppc can be loaded through the Refine page Just load a curve with the Curve 1 button then go to the Program Mount section and press Use Curve You can then import the curve to the Gemini L4 tab by pressing the From Created PE Curve button Setup Acquire Data Analyze Program Mount Refine Gemini L4 FE Files Step 1 Select previously created curve mM SSCS ear nfo rv Into I Show Full Filename Show Data Points Step 2 Select curve to use and press Use Curve Subtract 2 from 1 From Mount loads the current and saved PEC curves from the mount You can toggle between the current and saved PEC curves with the Show Saved PEC checkbox To Mount This will save the currently displayed PEC curve to the mount s Current PEC or Saved PEC table Select the table and press OK to program the table or Cancel to quit without saving If you have a fast serial port you may want to set the Delay between writes to mount to 0 milliseconds The default is 20 milliseconds but the range is 0 100 milliseconds In general if any error message pops up when
181. o pick a star within 45 degrees of the celestial equator in Northern hemisphere O lt declination lt 45 in Southern Hemisphere 0 gt declination gt 45 Make sure that Adjust Data for Declination is checked in the Settings Menu While you are at it also make sure that De Rotate Data is also checked If either is not checked then enable them 2 PEMPro v2 5 File Because Tools Wizards Help Pri Edit ASCOM Driver Settings Settings Summary F5 w De Rotate Data w Adjust Data for Dedination be Calibrate Images when Acquiring Data w Disconnect Scope on Disconnect Disconnect Camera on Disconnect Disable Fundamental Auto Find w Overlap Worm Cycles Fil Keep Main Form on Top w Restore last position when starting i 7 i l t f f a Ask for Filename and Comments when Acquiring Data _ Night Screen Mode Connect to your Gemini equipped telescope by pressing the Connect Scope button on PEMPro s setup page Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine Gemini L4 My Gemini Level 4 Configure Scopes Mounts Gemini Telescope Connect Camera Video Click to connect to mount ptoguider Port to Move Scope Wom period secs 239 34 C Southem Hemisphere Select your camera control program and connect to your CCD camera by pressing the Connect Camera button Also make sure that Use Autoguider Port to Move Scope is unchecked
182. o save your changes to a new entry in the table No two entries in the table are allowed to be the same so this button will not activate until the description is different from any other entry It Edit Press this button with a table entry selected will load the entry amp values into the edit controls Delete Delete Pressing this button will delete the item selected in the table You will be asked ee to confirm your delete Close button Pressing this button will close the dialog If you have edited any fields you will be asked if you want to save first Mouse Click any table entry to load its values for editing and to select it as the current scope Mouse Double Click an entry or selecting a checkmark will define that entry as the current selected scope That entry will be selected in the drop down list next to the Connect Scope button on the Setup Page when you exit the dialog Basic Configuration Parameters The remaining controls are used when playing back the corrected periodic error Usually you will only need to modify the Basic Configuration parameters Making sure these parameters are set correctly is very important to successfully analyzing and maximizing the reduction of a mountG periodic error It is very important to set the basic configuration parameters defined in this section accurately Binned Image Scale This is the binned image scale of your CCD Basic Contiquration camera in arc seconds per pixel
183. o turn the PEC on off If PEC is on then simply press the PEC OFF button Mum 0 00 1 00 F All Cycles Visible RA Axis Graph Y Scale x Sl 3048 4 Setup Acquire Data Analyze Frequency Spectrum Pra c Enable Automatic subframe 30x 30 E Stop hours i Time Then click the Acquire Data tab and press the Start button If you have Ask for Filename and Comments when Acquiring Data checked in the Settings menu you will have an opportunity to change the default filename and add optional comments to the file j Sm pe ee ee Setup Acquire Data Analyze Frequency Spectrum Pra a Enable Automatic subframe 50 x 5 v Stop hours z Ti A an Num Time i 100 Before PEMPro takes any images it automatically queries the mount for the current worm position and synchronizes the data that it is about to collect to the mount s worm phase This means that you can freely move the mount before acquiring data without the risk of forgetting to synchronize PEMPro to the mount Now just sit back and let PEMPro collect 5 6 cycles of periodic data The horizontal axis of the graph is worm phase and the vertical axis is the measured PEC After each worm cycle the color of the data will change E PEMPro v1 50 PemPro 2006 02 12 17595L txt File Settings Tools Wizards Help Arc Seconds Tm 2 Al Cycles Visible _ gt Caa RA
184. o v2 5 Sele File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash File Peak to Peak PE 86 19 Arc secs After clicking 4 Smooth 3 times v d O O _ 0 00 1 00 2 00 3 00 4 00 RA Worm Phase Minutes RA Axis Graph Y Scale Total Time Motor Index Worm Cycles Tik a5 50 44 eu 2 es Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine EQMOD PE Curve Graph Modify PE Curve PEC Quick Refinement PEC Table Data From Created PE Curve Active Curve Curve Phase Adjustment Fom EOMOD To Eamon Last Loaded Fie i F Upload changes immedistely to mount C Enabie PEC Drawing with Mouse rau iti u g EQMOD PEC File Scale Curve Total Phase Adjistment Scese Value Motor Ticks Secs Invert Inverts the curve each PEC cell that is positive is made negative and vice versa This is an extremely useful moidification to make when you find that a PEC curve adds to the periodic error measures greater afterwards rather then reduces the periodic error P PEMP TO v2 ers P PEM ro v2 5 4 ER Fie Settings Tous Weeds Hep Fle Settings Tous Woods Hep aa PEC Poker Agn Winerd Star Fircier Backissh PEC Pole Agn Wost Star Finder Backlash File Peak to Peek PE 86 18 Arc secs File Peak to Peak PE 66 90 Arc seos After clicking Invert F 0 aw zw aw Te im recon i RA Worm Phase M
185. of due South and at 0 degrees declination or higher if you are in the Northern hemisphere If you are in the Southern Hemisphere the star should be just West of due North and 0 degrees declination or lower In either case it is best to pick a star within 45 degrees of the celestial equator in Northern hemisphere O lt declination lt 45 in Southern Hemisphere O gt declination gt 45 Make sure that Adjust Data for Declination is checked in the Settings Menu While you are at it also make sure that De Rotate Data is also checked If either is not checked then enable them Ett PEMPro v1 60 File Settings Tools Wizards Help Settings Summary FS w De Rotate Data w Adjust Data for Dedination Calibrate Images when Acquiring Data 4 Disconnect Scope on Disconnect w Disconnect Camera on Disconnect w Keep Main Form on Top y Restore last position when starting l Ask for Filename and Comments when Acquiring Data Connect to the mount press the Connect Scope button on PEMPro s setup page Setup Acquire Data Analyze Program Mount Refine AP Raw PE Connect Scope My new AP Mount Connect Camera MaximDL CCD M Use Auta Worm period secs 382 95 t Southern If you do not have the latest version of the Astro Physics ASCOM driver a dialog will pop up warning you of that At the time of this writing version 4 1 25 is the current version
186. olo PemPro 2005 03 18 227335 tHE File Settings Tools Wizards Help Arc Seconds 2 00 00 3 00 00 4 00 00 5 00 00 RA Worm Phase Minutes AllCycles Visible gt Parent Ba RA Asis Graph r 5cale Total Time Wom Phase Worm Cycles Samples T 79 00 1 34 56 04 57 15 H45 Setup Acquire Data Analyze Program Mount Refine PE Files m Curve 1 PemPro 2005 05 28 21 4806 ppe Clear Info Inver m PemPro 2005 06 02 005742 ppe Gee Vales Invert Show Full Filename Show Data Points Create New PE Curve Shift Curve Save Prograrn Mount Subtract 2 fror 1 Curve 1 Red Created Curve Geen Curve 1 Red SCALE CURVE Create 1 00 Save Curve Use Cure Scope Connected Cameras Connected First load in Curve 1 red the periodic error curve created without the mount periodic error management active Next load with Curve 2 blue the periodic error after the mount was programmed In the Create New PE Curve group box select MAdd 1 and 20 This should produce a third curve which will be green To program the new curve select Created Curve Green in the Program Mount group box then press the Use Curve button This will transfer the curve to the Program Mount tab ready to be played back to the mount Other features of this page Clear clears the filename and its curve on the graph Info Displays information about the PPC file Show Full Filename If che
187. om bearing ball i 172 00 Stepper Gear ag 5 k og 10 20 Steppers Transfer Drive gear teeth ioe OE 478 69 Wom Period 1 selected Frequency lota a eee Scope Not Connected Camera Not Connected 6 You can uncheck or check any of the frequency values in the table and that frequency will respectively disappear or be made visible 7 Click Check ALL to make visible all table entries in the graph 8 Click Uncheck ALL to remove all table entries on the graph Adding or Editing Known Mount Fundamentals You add new mount fundamentals by editing existing files or adding new files to the Fundamentals directory under the install path Fundamentals Hex File Edit View Favorites Tools Help Ar 2 Q Bac es DB pO search gt Folders Ei Address B C Program Files CCDWare PEMPro V2 Fundamentals j Go Folders i Name Size Type Date Modified E C ccDware A lap def 1KB Export Definition File 3 24 2008 1 02PM 2 cepstack D marks def 1KE Export Definition Fie 8 22 2008 2 12 PM E PEMPro v2 far Fundamentals fn Settings Add Known Mount Fundamentals files in this directory Files can be created and edited with Windows Notepad The format rules are very simple 1 The file can have any name or extension Def is used by default PEMPro will try reading all files in this directory but you must restart PEMPro for it to read new files and changes 2 Blank
188. on is determined 2 PEMPro v2 0 Beta Detak PEMPro Setup Calibration Wizard Step 4 of 4 detemine Movement Direction Step 4a Capture Star Trails Step 4b Select Star Trail Pattem Select movement method in Step 3 Select duration below and press Start PEMPro will slowly move the telescope during the Exposure A Image Duration 3 in seconds After the image has been taken select the pattem that best matches the star trails in the image Press Finish and you have a completed calibration RA Ads X Direction T PEMPro will move the mount in RA and in Dec which will result in an L shaped star pattern for all the stars in the image The StarTrailViewer application will again display Remember the pattern and exit StarTrailViewer When you are back at the Wizard pick the pattern that most closely resembles what you saw Click Finish to exit You are ready to acquire PE data after re centering a suitable star Acquiring PE Data Before acquiring data you should run the Setup Calibration Wizard PEMPro has the ability to work with stars up to 80 degrees declination but it is recommended that you choose a star within O degrees and 45 degrees declination North or South of the Celestial equator Center the brightest star and take a half second exposure If the brightness of the star is between 1 000 and 20 000 that is a good star to use You can try shortening or lengthening the expos
189. onds 10 0 15 0 20 0 25 0 sseeg 0 00 3 00 4 00 5 00 RA Worm Phase Minutes recorr Al Cycles Visible gt Current Worm RA RA Axis Graph Y Scale Total Time Phase Worm Cycles Samples 2700 0 07 43 0052 o 760 Setup Acquire Data Analyze Program Mount Refine Celestron Firmware Rew 5 6 From Mount From File To Mount To File While you are connected to your mount and in the Celestron Menu you can directly load a previously created curve PEMPro automatically creates these curves which have the extension ppc whenever you use Create PE Curve E PEMPro v1 60 File Settings Tools Wizards Help Load File for Analysis F2 Load Existing Curve Create a PE Curve Export PE Data Exit Arc Second 2 00 2 00 4 00 S00 RA Worm Phase Minutes Current Worm RA RA Amis Graph Y Scale Total Time Phase Worm Cycles Samples 00704 070s 0 o _ All Cycles Visible gt Setup Acquire Data Analyze Program Mount Refine Celestron PE Curve Phase Firmware Rew 5 6 From rested PE Curre 10 0 From Mount From File When the curve is loaded it is also automatically shifted by the number of seconds in Phase Adjust In the example below the curve is loaded and shifted right by 10 seconds because phase shift is set to 10 seconds PEMPro v1 60 File Settings Tools Wizards Help Paakto Peak PE 36 38 Arc secs After loading the curv
190. onds Worm period divided by 1 382 95 2 191 48 seconds Worm period divided by 2 382 95 10 38 29 seconds worm period divided by 10 382 95 0 5 765 9 seconds this could be real harmonic but is probably just drift fitting error Once you note the fundamentals you can customize PEMPro to look at only those fundamentals with the menu option File Edit Fundamentals which is described below Moving the cursor over the graph window will show the frequency in multiples of worm period error x axis and the arc seconds error y axis of this component The amplitude of of the data peaks may not match the amplitudes in the FFT Waveform Analysis table because the peaks have a non zero width and the actual amplitude is related to the area under the peak Frequency Spectrum secs Shows the periodic error components in units of seconds Moving the cursor over the graph window will show the frequency in seconds x axis and the arc seconds error y axis of this component The amplitude of of the data peaks may not match the amplitudes in the FFT Waveform Analysis table because the peaks have a non zero width and the actual amplitude is related to the area under the peak FFT Waveform Analysis This table has the fundamental waveforms of the period of the worm gear PEMPro automatically calculates the optimized values for each fundamental and displays the amplitude and phase FFT Waveform Analysis Fundamental Freg cycles worm pe
191. ount Quick Setup Wizard Mount Quick Setup Wizard STEP 2 Mount Type AP 900 1200 GTO Rev G and later AP Mach1IGTO AP GTOCF3 Controller Celestron DFL Losmandy G 11 Losmandy G 11 Losmandy G 11 5 The final step defines the ASCOM telescope driver Most mounts have ASCOM drivers with some notable exceptions such as Software Bisque s Paramount series If your mount does not have an ASCOM driver PEMPro supports connections to the mount through Software Bisque s The Sky 5 Level IV and The Sky 6 Professional It is recommended to use the ASCOM driver if your mount has one and if not just leave the Use ASCOM Driver checkbox unchecked PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 3 ASCOM driver Part 1 if your mount has an ASCOM driver lea ACCAR Tiu then check se ASCOM Driver and select sat eae Ned Pelle the diver Do not connect through a hub like POTH which may cause timing problems in some cases if your mount does not have an ASCOM driver then ignore this step AstroPhysics Telescope Part 2 ff you havent already configured the COM port and other settings then the Edit Driver Settings button and do so lt a If you are not sure which driver is applicable you should email empro ccdware com PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 3 05 00M dics I w ASCOM Telescope Chooser Select the type of telescope you have then
192. ount to track at nearly perfect sidereal rate Because there are always very slight errors in the manufacturing process every one of those gears is not perfectly round They are shaped more like an ellipse but the error is so small you might not be able to actually tell that the gears are not perfectly circular Now because each gear is an ellipse it causes the mount to move faster when on the longest diameter of the ellipse and slower on the shortest edge If you where to chart the motion produced by the gear it would look like a sine wave with a specific duration Most often the gears also rotate an exact integral number of times in one worm period This ratio whether it is an integral or not is sometimes called a fundamental So if the worm period were exactly 480 seconds and a gear rotates 10 times in each 480 second interval it has a Fundamental of 10 because it would produce a sine wave that repeats 10 times in 480 seconds In actual time that would mean each rotation of the gear takes 480 10 48 seconds For example in the picture below there are major fundamentals at 1 2 and smaller fundamentals at about 0 5 and 10 Graph Type Drift Fitting l RMS Error Jina Frequency Spectrum Quadratic Graph of PE Frequency Spectrum Periodic Eror 7 7 9 9 5 10 15 20 In physical terms this means that this mount which has a worm period of 382 95 seconds has repeating errors at 382 95 1 382 95 sec
193. ounts and change the ASCOM driver to be the native Astro Physics driver One other thing you will want to do is to make sure PEC is off PEMPro has convenient buttons to turn the PEC on off If PEC is on then simply press the PEC OFF button z Al Cycles Visible gt RA Axis Graph Y Scale x 750 Setup Acquire Data Analyze Program Mount Refine Start Binning i Subframe 24x 24 Then click the Acquire Data tab and press the Start button You will be presented with one final opportunity to enable or disable the mount s PEC mechanism If you are collecting data for an initial PEC curve then click Disable PEC before Acquiring If you are measuring PE after uploading a PEC curve or are planning to refine your periodic error then click Enable PEC before Acquiring 1 00 PEMPro Set PEC State Enable PEC before Acquiring Disable PEC before Acquiring If you have Ask for Filename and Comments when Acquiring Data checked in the Settings menu you will have an opportunity to change the default filename and add optional comments to the file Click here for more details Setup Acquire Data Analyze Program Mount Refine AP Raw PE Set Binning fi M Always show last centroid Subframe 150x50 IM XY in arc seconds Before PEMPro takes any images it automatically queries the mount for the current worm position and synchronizes the data that it is ab
194. ounts you should select ASCOM RA Usually Relay X moves the RA Axis but PEMPro will warn you if it does not If the camera relays are not an option then you must use ASCOM to move the mount Whichever method you select this step will confirm that the movement method is working properly Another image is taken and StarTrailViewer will display again asking you to identify the start and end of several star trails aBa PEMPro SulipiCamnalion Wizard 3 Step 3of 4 Establish Autoguider Axis and Guide Rate You can skip this step if PEMPro can write the PEC Curve directly to the mount like is the case for Astro Physics GT OCP3 controllers Paramount 11005 ME and Gemini Level 4 Meade Classic 16 LA 200GPS and RCX 400 In this step you will determine the autoguider axis direction and approximate guide rate PEMPro will start an exposure and move the telescope in the axis you select Like in the last sten the Star Trail View nroaram will disnlaw the image and vou should click on the start and end of atleast 3 star trails Ifthe stars are nottrailing then check the connections to your mount or try changing the Move RA Via option Move RA via Take Image Results Duration 5225 Guide Rate Select movement 20 1 02 method Guide Angle ASCOMRA w as After the StarTrailViewer application closes click Next to continue to the last Step In Step 4 the movement directi
195. out to collect to the mount s worm phase This means that you can freely move the mount before acquiring data without the risk of forgetting to synchronize PEMPro to the mount Now just sit back and let PEMPro collect 5 6 cycles of periodic data The horizontal axis of the graph is worm phase and the vertical axis is the measured PEC After each worm cycle the color of the data will change Note The pictures below in this section are for illustration only They are not from an Astro Physics mount PEMPro v1 50 PemPro 2006 02 12 17595Ltxt File Settings Tools Wizards Help Are Secands 2 00 RA Worm Phase Minutes 0 46 56 Setup Acquire Data Analyze Program Mount Refine Stop Binning i W Always show last centroid MM Adjust X for X Drift X Drift 0 006 Adjust Y for Y Drift Y Drift 0 000120 Click Stop when you are done collecting data If you have Ask for Filename and Comments when Acquiring Data checked in the Settings menu you will have a final opportunity to add comments to the file or delete the log file and start over If you don t delete the file you will be prompted to go directly into the create curve dialog P PEMPro v1 50 PemPro 2006 02 12 175951 bd loj x File Settings Tools Wizards Help 5 0 0 0 w GC O o a afi i im lt Would you like to immediately analyze and create a PE Curve If you select No you can do this later by cl
196. ove in RA arc seconds is Guide Rate Count Pulse Duration 1000 So for a Guide Rate of 1x Sidereal count of one hundred 100 10 millisecond pulses the movement should be 1 second in RA To be more accurate wih this small pulse you may need to do more pulses like 1000 or even 5000 If you find that the mount does not move accurately with 10 msec pulses not uncommon you can try the same test with larger pulses until you find a pulse duration that moves the mount accurately e PEMPro v2 0 Fie Settings Tools QiireieG Help Mount Wizard F Calibration Wizard F9 PEC ooo U Polar Align W Mount Wizard brings up the Mount Quick Setup Wizard Its keyboard shortcut is the F8 key Calibration Wizard brings up the Setup Calibration Wizard Its keyboard shortcut is the F9 key Help Ze PEMPro v2 0 File Settings Tools Wizards Maam Help 7 PEC Polar Align Wizard Sta Las et Regstration Check for Updates Support Forum ASCOM Web Site About Help Shows this help file Registration Shows registration information Check for Updates Checks if there is a newer version available Internet access Is required You can disable the Check for Updates feature by entering a 0 in the field near the top et PEMPro V2 Version Check Sele Auto check for a new version every 0 days fenter 0 to disable Installed Vers
197. p Acquire Data Analyze Program Mount Refine AP Raw PE PE Curve From Created PE Curve ponmi To File Wo sd on he wd pi o da da M B M a oo Scope Connected Camera Connected 8 Check Corrected PEC After you upload the new PE correction curve you will want to turn PEC On and acquire at least 2 worm cycles of data If you see that the periodic error is worse than before you can go back to the AP RAW PE tab and press the Invert Curve button and then click To Mount to send the curve to the mount again Then start the acquire data again The mount s periodic error should be significantly reduced PE Curve From Created PE Curve From Mount From File 0 0 00 J 7 0 00 a 1 0 39 0 0 0 00 _ Mom _ Tre a 2 0 79 255 E 0 05 Modify PE Curve 3 1 18 0 J 005 Shift Value cells 4 158 0 3 0 05 Shit shits 1 4 5 197 755 2 0 10 6 237 0 p 0 10 a aa e Demon Scale 10 j 7 3 01 If after checking the corrected periodic error of the mount you find that you want to try for further improvement you can use the Refine feature AP Raw PE Tab features Below is the AP Raw PE tab before connecting to the mount All the buttons and controls are disabled except the From File button and the Shift and Scale numeric up down controls If you click From File you can load in a previously saved PEC curve The table will then fill with entries from the file and a graph of the curve will displ
198. pes Mounts _ AstroPhysics Telescope Connect Camera MaximDL CCD id C Use Autoguider Port to Move Scope Wom period secs 382 95 z E C Southem Hemisphere Min Star Brightness 20 x Max Star Brightness 1000 Log and Images Dir CAMy Documents CCDWare PEMPraV2 esl Connect Scope This will connect to the scope Typically you will not need to connect to the Scope until you are ready for playback but it is good to try testing that you can connect before spending time acquiring PE data IMPORTANT To connect to your scope you must have the ASCOM 4 1 platform or later TheSky5 or TheSky6 installed Also you cannot connect to the scope mount if you have checked the option to use an ASCOM driver in the Configure Scopes Mounts dialog but didn t without an ASCOM driver defined If a driver is not defined the Connect Scope button will be disabled Typically you will not need to connect to the scope until you are ready for playback but tt is good to try connecting before spending time acquiring PE data Configure Scopes Mounts Press this to manually configure your mount settings Alternatively you can use the Mount Wizard in the Wizards menu Connect Camera This will connect to your CCD Camera PEMPro can connect directly to Meade DSI series cameras and video web cameras that have a DirectDraw or WDM driver PEMPro can also connect to any camera supported by these camera control programs you must purchase these programs sep
199. ph Type There are four graph types Periodic Error Error Histogram Frequency Spectrum and Frequency Spectrum secs Periodic Error Shows the fitted curve that PEMPro created against the original data This is the default display when this dialog opens Moving the cursor over the graph window will show the phase of the mount x axis and arc seconds y axis Error Histogram When selected the graph will show the histogram plot of the errors last column in the Data Points Table This histogram plot shows the distribution of these errors If the distribution is broad then the PE curve is not likely very accurate If it is asymmetrical that might signal a physical problem Moving the mouse over the graph will display the error value and the number of instances found for it The blue line is the center point 0 arc sec error The buttons to the left and right of the scroll bar on the bottom allow you to increase or decrease the resolution of the histogram Moving the cursor over the graph window will show the arc seconds error x axis and the number of instances in the data where this amount of error occurred y axis Graph Type Drift BLUE EMS Error TO Error Histogram Y Quadratic oo Error Distribution Histogram Breen tere Frequency Spectrum Shows the periodic error components in inverse units of worm periods In almost all mounts are a number of spinning gears that ultimately allow the m
200. ploaded to the mount High Accuracy Syne 35 secs AGUUNURUTROUUSTION Shift key to hola Enter Mode and Goto _ You must do this BEFORE Mode Goto acquiring data RA PEC RA ira Segment a Worm Cycles Samples 35 5 211 1 12 0 be os ee Light 0 opes Mounts Meade Telescope i Scroll Hel Scroll cee Down Enable Scope Position Updates Dec R Hour Angle Step 5 Synchronize PEMPro to the LX200 GPS First you should erase the mount s PEC table To erase the mount s PE table click Clear PEC and then To Mount as shown below Setup Acquire Data Analyze Program Mount Refine OSAM GPS PE Curve Firmware 4 01 Oct 18 2005 L PEC Residual Fro Th ipsa PEC SUVE Periodic Error Table E Factory PEC Clear PEC Clear PEC 5 08 Raw Value __Aeosecs_ _s mee Soqoqoaqaaaa a 5 dee G1 ie Co de GS ee a 3 4 5 6 Fi g 9 1 0 Once the PEC table has been erased you can very easily synchronize PEMPro to the mount with the Meade Hand Box utility described above Just press the Sync PE button and you are done To get and analyze the raw PE in the mount you must first turn off the mount s PEC To do that press the PEC Off button on the Meade Hand Box utility Once you have done that you can click to the Acquire Data tab in PEMPro and collect data To get and analyze the residual PE in the mount after a PEC curve has been
201. produce tighter stars What is Periodic Error Correction Almost all telescope drives made for astrophotography have some sort of Periodic Error Correction PEC facility even inexpensive mounts The purpose of PEC is to compensate for the mechanical imperfections in the RA motion of the telescope caused by imperfections in the drive Note that some mounts have a different name for PEC such as PEM Astro Physics Inc and SmartDrive Meade Typical ways to train your mount s PEC e Manually with cross hair eyepiece very tedious but can produce good results e With an Auto guidert limited by seeing and the accuracy of software and hardware control Also the time delay between autoguider image acquisition and mount movement reduces the accuracy of the corrections e With PEMPro i periodic error is collected over multiple cycles and modeled before being written back to the mount Effects of seeing and delays in image acquisition are eliminated How PEMPro Works The process of using PEMPro is very simple but you will need a telescope and CCD camera that optimally provides at least 1 5 arc seconds pixel resolution for the best results Acquire PE Data Details Load the PE data for analysis Details Create a fitted PE curve to the data Details Program the mount with the PE curve Details Verify PE has been corrected by acquiring PE data again ee U Software required supported by PEMPro Required Sof
202. r 174 00 Wom bearing ball E 172 00 Stepper Gear E 10 20 Steppers Transfer Drive gear teeth 1 472 69 Wor Period 1 lt Frequency aoe ae Show Selected Frequency Additional Features 1 When the mouse cursor is over the graph the representative time and worm frequency are shown Cursor reflects time and worm frequency below graph he E mo r 3 i F E NTT teia am N i kri 216 0 Secs 2 22 Worm Freg 1 0 0 9 0 5 Q7 0 6 0 5 0 4 03 Relative Magnitude 02 0 1 0 0 i R EE Ba m E N Drag to scroll graph left or right j E d 3 Additionally you can scroll the graph by holding the left mouse button down and dragging the graph left or right Cursor aa with ett mouse button held down You can then drag the graph left or right by Keeping the left mouse button pressed and moving the mouse left or right Waa sors 3 34 Worm Frea s 4 If you place the cursor over a one of the letter labels the text for the label will display et PEMPro v2 5 F Astrosave PemPro Tests Bruce Feagle EQMOD PE data PE 2 2 3Aug08_FOQMOD txt kE File Settings Tools Wizards Help PEC Polar Align Wizard eae Et Finder Backlash Transfer Sear aE a 0 9 0 6 GT 0 5 0 5 Placing mouse cursor over B in 04 graph header shows Transfer a Gear from table below it
203. r fill up as that time interval passes Once reached the progress bar will reset and start over now showing the progress of the sync pulses PEMPro lolx LX200GPS PEC Synchronization Wizard Step 2 of 3 Capture Pulses From your mounts hand controller start a PEC recording Once you have started the recording press the Start Sync Button PEMPro will send precisely timed pulses to the mount about 1 minute after pressing this button After the PEC is done on the hand controller press Next For your reference a timer will start to let you know how much time has passed Make sure not to move the mount with any tease Start Syne Waiting 1 Minute before starting Synch Pulses OOeoEoo Stant Syne lt Back Next gt Ca Sal After about 9 minutes have passed press the Next button PEMPro will download and analyze the PEC data and set PEMPro s internal phase to match the LX200 s phase Now you can Acquire data and write it directly to the mount as shown earlier on this page PEMPro LX200GPS PEC Synchronization Wizard Step 3 of 3 Calculate Worm Phase PEMPro found the first reference pulse at index 199 lt Back Next gt ae IMPORTANT If you slew or move the telescope you will need to resynchronize PEMPro if you want to acquire more PE data Paramount GT 1100S and Paramount ME PEMPro can create a raw PEC file for upload to the Paramount GT1100S and Paramount ME NOTE PEMPro offers
204. raph Modify PE Curve PEC Quick Refinement PEC Table Data From Created PE Curve Create Refinement Curve You can create a refinement curve by From EQMOD j _To EQMOD adding the residual PEC data Acquired Create Data with PEC on to the existing PEC curve paced hacen EQMOD PEC File Refinement Curve After creation the refinement curve is ready invert Mount Data to be uploaded to the mount You can do Load this refinement step any number of times C invert PEMPro Data Save This is how it works 1 Acquire PEC data with PEMPro with PEC OFF 2 Create a PEC curve and upload it to the mount 3 Turn PEC on and acquire more data 4 If you want to try to improve the PEC curve then create a PEC curve of the residual periodic error in the mount 5 If you had to invert the curve when you uploaded the PEC data in above in 2 then check both Invert Mount Data and Invert PEMPro Data Click Create Refinement Curve 6 Upload the curve to the mount by clicking To EQMOD and select the Refinement Curve PEMPro Select curve to write to EQMOD Select Curve Mount Curve Last Loaded File PEMPro Created Curve Refinement Curve 7 If you want to refine again go back to step 3 PEC Table Data Tab Setup Acquire Data Analyze Frequency Spectrum Program Mount l Refine EQMOD PE Curve Graph Modify PE Curve PEC Quick Refinement PEC Table Data From Created
205. raph Y Scale __ Total Time Motor Index Wom Cycles Samples D A G a 8933 8 o 23 18 16397 2 Oo ii 7 Disconn ct cope Configure Scopes Mounts Eqmod Telescope Video C Use Autoguider Port to Move Scope OUNPARK O O Wom period secs 478 69 C Southem Hemisphere Min Star Brightness 3 Max Star Brightness 100000 5 Sync Wom Cycle Log and Images Dir C My Documents CCDWare PEMProV2 1e i Scope Connected Camera Not Connected If your EQMOD does not say PEMPro Enhanced then either try uninstalling reinstalling PEMPro V2 5 or you can download the latest zipped EXE file from this link http www siriusimaging com PEMProV2 EQMOD PEMProLatest zip If you download the zip file then extract the file contained in the zip archive EQMOD EXE over the original file with the same name in c Program Files Common Files ASCOM Telescope If you ever need to reinstall the Original just reinstall the EQMOD driver using its installer Step 3 Connect to the Camera PEMPro can connect directly to all Meade DSI I Il and Ill cameras all The Imaging Source USB Firewire cameras and any webcam that has a DirectDraw or WDM driver such as Phillips Toucam Pro and 900c series Meade LPI and Celestron Nexl mage PEMPro also has a very useful Bad Pixel Removal tool and also a video clean up option PEMPro can also integrate a video exposure for an arbitrary period of time you can use the Star Finder
206. rate program like Excel User Comments This button will be enabled when there are user comments in the current file Pressing the button will bring up a message box with the comments You can also display the user comments by hovering the mouse over the area shown below The comments will be displayed as a tool tip Setup Acquire Data Analyze Program Mount Refine AP Raw PE 5 13 2006 11 25 09 PM Adjust X for X Drift x Dat 4008447 ens oe Adjust Y for Y Drift Y Dnt 0 027509 ii ts XY in arc seconds Initial Phase 3 36 09 Create a PE Curve Load File Export Data Time Worm Cycle Worm Ph Centroid Centroid Max Pixel ya E User Comments 1 0 00 00 060 3 36 05 90 000 0 000 9801 00 ore 2 0 00 02 443 Wann manen in thie Da0 0 627 6692 00 m aaa 3 E ns a Se 0 180 10061 00 4 0 00 06 990 area will display user 102 0 247 12175 00 E ae 5 0 00 09 683 comments if present fi274 0 536 8766 00 eee E 0 00 11 997 anne 1 832 1 342 10066 00 0673 3 7 0 00 14 310 1 03 50 340 0 296 1 604 a398 00 i Worm Period Worm period of the mount taken from the Acquired Data or a loaded file Image Scale The image scale of the loaded data Note that you can alter this before creating a PE Curve Adjust X for X Drift If checked will recalculate the X centroids accounting for the 50 point moving average of the trend of the star movement in the X axis This feature doe
207. re for more details Before PEMPro takes any images it automatically queries the mount for the current worm position and synchronizes the data that it is about to collect to the mount s worm phase This means that you can freely move the mount before acquiring data without the risk of forgetting to synchronize PEMPro to the mount The synching process can take up to 5 seconds so while it is happening this dialog will display PEMPro q Synchronizing Celestron PEC Index Now just sit back and let PEMPro collect 5 6 cycles of periodic data The horizontal axis of the graph is worm phase and the vertical axis is the measured PEC After each worm cycle the color of the data will change Note The pictures below in this section are for illustration only They are not from an Celestron mount PEMPro v1 50 PemPro 2006 02 12 17595Ltxt File Settings Tools Wizards Help Arc Secoands 200 PEC ON RA Worm Phase Minutes a 2 Al Cycles Visible gt TOE T P RA RA Amis Graph Y Scale Total Time Phase worm Cycles Samples X 12 50 0 46 56 03 03 1 114 Setup Acquire Data Analyze Program Mount Refine sep Binning i W Always show last centroid I Adjust X for X Drift X Dritt 0 000446 Adjust Y for Y Drift Y Dnt 0 000120 dseg 0 00 Subframe 50x50 M XT inare seconds Click Stop when you are done collecting data If you have Ask for Filename and Comments when Acquiring Data checked i
208. re ia SMAI Hari re ic JUNG vite DOG r AKG List Click on a pixel to toggle Click row to center pixel in view N X Piel Y Pixel 0 368 250 2 Click magnified bad 1 si ae pixels in this window to 3 371 250 toggle state of a bad pixel 4 372 250 5 373 250 6 368 251 E 7 369 251 Eo E 8 370 251 9 371 251 i 10 372 251 11 373 251 12 37 250 Magnification Blink Bad Pixels CR re ee 116 Disable Bad Pixel Comection Move image a Scale Degrees C Tracking Enabled ps 135 Alternatively you can use the Take Dark button to take a simple one frame dark which will be subtracted from the image Usually contrast of stars is increased dramatically You don t actually need to cover the camera just move the telescope to an area of the sky with no stars and click Take Dark The following two images shows the effect of this dark subtract feature WITHOUT Dark Subtraction Calibrate Find Star Track PEMP f Moure f Acauina Pr 18 g Tano Cursor Pos C Tracking Enabled 9 eee 135 S 7 3900 WITH Dark Subtraction amp PEMPro Video Interface PEMPro Move C Tracking Enabled Calibrate Aro nec pxe mage 1 91 a Scale Degrees Image 1 IR Angle EX A vY Track Tracking radius Find Star Cursor Pos 2 1 102 Star Finder Page If you have a long focal length telescope and or small field of view with your camer
209. riod Amplitude arc seconds Phase degrees 1 000 6 392 6 0 2 000 4 000 316 6 3 000 0 088 Ad 2 4 000 0 037 117 5 5 000 0 140 105 1 6 000 0 070 15 4 r er ace nonm a4 You can check or uncheck each fundamental to see how the waveform changes As you do this watch the Total RMS Error in the upper right This is a measure of ngoodness of fito of the curve to the data The lower the RMS Error the better the fit That shows the root mean square error in arc seconds of the fitted PE curve to the data Below this ts the Periodic Error of your mount in arc Seconds as calculated by the terms in use Important be sure that the Image Scale value in the lower left corner is correct for your camera If it is not you need to Cancel this dialog change the image scale in the Analyze page and come back to this dialog If you are not sure which axis is the RA axis you can switch between axes with the RA Axis combo box Export Data Exports the data points and FFT parameters for Lot rll analysis in an external program like Excel Create PE Profile and Close Press this after you are satisfied that you have an optimum periodic error curve This will close this dialog and display the Program Mount Page Edit Fundamentals Use this option to edit the fundamentals This is usually used in conjunction with the Frequency Spectrum graph Hew Fundamental 100 He O00 New Fundamental
210. rizontal on a CCD image Graph Y Scale The vertical scale of the graph You can change this at any time by entering a new scale or using the up down numeric buttons Holding one of the buttons down will after a short period cause the increment to repeat automatically If held even longer the repeat rate will accelerate TotalTime The total time PEMPro has been active Current Worm Phase The mount s current Worm Phase You can double click this with the mount connected to query the mount to get the phase position again Worm Cycles Number of worm cycles that have been completed since the time the program was started or the Start button was pressed on the Acquire Data page RA Samples Number of images centroid calculations PEMPro has taken since the last time the Start button was pressed or that are in a loaded log file PEMPro Mount Quick Setup Wizard This wizard will setup all of the important parameters and only takes a couple minutes to use PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard STEP 1 Description Enter a descriptive name or phrase for your telescope mount This name will appear in the scope drop down list box on the Setup tab in PEMPro s main fom My AP GTO Mount Enter any descriptive name for your telescope mount and click Next Here select the type of mount telescope that you have If you don t find your mount in the list then select Other and follow the directions here PEMPro M
211. rk IF you recognize the program or trust the publisher you can unblock it When should unblock a program It is OK to click Keep Blocking The Simulator does not in any way try to connect to the Internet nor does PEMPro connect to the internet except when you ask for a trial license key What the Simulator is doing is trying to create a UDP port so that it can communicate with PEMPro PEMPro likewise will create a UDP port to talk to the simulator PEMPro and the Simulator only communicate on the local PC and never over the internet PEMPro uses the UDP Protocol as a method of intertask communications because it is efficient and well supported by the various programming environments But the most important thing is that the simulator does not access the internet access and it will work OK if you press Keep Blocking Starting with build 58 there is a default PPC file included with the installation It is named PEMProSimulatorTestCurve ppc You can load a different file at any time with the File Load menu This can be any PPC file that you have created with the Create PEC Curve dialog J PEMProSim F Sou File Config Load Curve Once a curve is loaded you will see the curve in Maroon and a moving vertical blue line which is the current worm phase You can change the scale by adjusting the Y Scale arc secs control There are four buttons on the upper left that allows you to set the state PEC On Pl
212. ro s main window When the create PE Curve dialog opens it may take a few seconds to calculate an optimum curve In most cases you won t need to do any modifications to the curve Advanced users may wish to add or remove fundamental frequencies to see how that effects the curve s fit the measure of which is the RMS Error in the upper right of the dialog PEMPro Create PE Curve 0 181 3 43 4 740 aa FFT Waveform a 3 078 3 256 0 082 3 407 0 060 3 532 0 315 3 626 0 132 3 690 0 089 3 722 0 071 3 725 0 065 TEET 0 00 02 719 0 00 05 375 0 00 06 062 0 00 10 750 0 00 13 465 0 00 16 140 0 00 16 644 l en ee ee lll Initial Worm Phase Image Roll degrees Be ae Cancel Export Data Worm Penod 5205 a a os Create PE Profile and Close Before leaving this dialog take a moment to check that the Worm Period Image Roll Declination and Image Scale look correct If anything looks wrong click Cancel and go back to the Setup and Calibration Wizard to setup the parameters again Otherwise press Create PE Profile and Close if you are satisfied with the curve Adjust Curve and upload to the mount After the Create PE Curve dialog closes in the previous step PEMPro will automatically switch to the Gemini L4 tab and ask if you want to upload to the mount If you click Yes the curve is immediately uploaded to the mount and you are done PemPro mm x Program Gemini PEC now 7 If you selec
213. rom the file and a graph of the curve will display Setup Acquire Data Analyze Program Mount Refine Celestron PE Curve From rested PE Curve From Mount From File Tio Mount To File Smooth Once PEMPro is connected to the mount on the Setup tab the From Mount and other buttons are enabled Also the Firmware Rev is displayed Setup Acquire Data Analyze Program Mount Refine Celestron placa Firmware Rev 5 6 rae From Created PE Curve H Celestron PE Data Esai is From Mount From File The From Created PE Curve button is enabled if a curve has been created with the Create PE Curve dialog Also all the controls will be enabled if a file is loaded with From File or From Mount is used to read the PE data Here is a summary of all of the controls From Created PE Curve loads a PE curve that has just been created or loaded A previously created curve ppc can be loaded through the Refine page Just load a curve with the Curve 1 button then go to the Program Mount section and press Use Curve You can then import the curve to the Celestron tab by pressing the From Created PE Curve button Setup Acquire Data Analyze Program Mount Refine Gemini L4 PE Files Step 1 Select previously created curve PemPro 2006 02 12 175951 ppc Invert Rev Info invert Rev F Show Full Filename Show Data Points Step 2 Select curve to use and press Use Curve Create New PE Curve Shift C
214. rst thing you must do is to create an instance of a Gemini Mount in PEMPro The easiest way to do that is with the Mount Wizard Press F8 or go to the Wizards Menu and select Mount Wizard ree DUPE AAL F C oe airy ry ia p dip POY J File Settings Tools Help C Polar Align WV TES Calibration vera FQ When the Mount Wizard comes up enter a unique name for your mount When you exit the Mount Setup wizard the name you type will appear in drop down list box to the right of the Connect Scope button on PEMPro s setup tab 2 PEMPro Mount Quick setup Wizard Mount Quick Setup Wizard STEP 1 Description Enter a descriptive name or phrase for your telescope mount This name will appear in the scope drop down list box on the Setup tab in PEMPro s main form My Gemini Level 4 Press Next gt to continue Select Gemini Level 4 in the drop down list in Step 2 Click Next gt to continue Et PEMPro Mount Quick Setup Wizard Mount Quick Setup Wizard Z STEP 2 Mount Type Telescope Mount Type f you dont see your mount type select Other MI 250 Paramount ME Paramount 17005 Pulsar Simulator Other Gemini Level 4 e PEMPro Mount Quick setup Wizard Mount Quick Setup Wizard STEP 3 ASCOM driver Pat 1 if your mount has an ASCOM driver then check Use ASCOM Driver and select facilitates the driver Do not connect through a hub like POTH which may cause timing problems in selec
215. ry 17th 2006 It is important to make sure that when the data is acquired that the mount has been synchronized with a High Accuracy Sync Arc Seconds 0 00 j 4 00 3 i 10 00 12 00 14 00 16 00 RA Worm Phase Minutes _ All Cycles Visible gt 0 00 25 Setup Acquire Data Analyze Program Mount Refine RCX 400 Create a PE Curve 2 17 2006 6 47 35 PM I Adjust X for X Drift X Drit 0 010241 Load File cal ae Adjust Y for Y Drift Y Drift 0 004663 ENN 4 XYinarc seconds Initial Phase 20 4405 m L Time Wom ice Wom Phase Acer YConit Mas Bes User Comments User Comment 0 00 00 170 20 44 052 ig oa seg ene 0 00 04 366 20 48 248 43607 a 3 O00082 20 52 724 TERA 0 00 13 819 2057701 i ums ac 0 00 18 736 21 02 618 wT 5 1 449 0 00 73 GRA 7107 546 Scope Not Connected Camera a Not Connected The data is pretty rough because of seeing and wind that was present that night There is also Substantial drift in Right Ascension which may be the result of mis polar alignment an imperfect tracking rate or mount OTA flexure The data however is good enough to create a
216. s Max Star Brightness Sync Wom Cycle Log and Images Dir CAMy Documents CCDWare PEMProV 6 Once the camera has been selected press Connect Camera 7 To test that PEMPro can use the camera switch to the Star Finder tab see picture below and set the exposure to 1 0 seconds or other appropriate exposure duration Finally click Snapshot it PEMPro v2 0 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash eee a E Set Duration first then click the Snapshot button C a Camera Spiral Find Star arc nins os xelScale arc secs TASES z ee ee En Height af 6 20s kasil Meacurad Angie Use Scale Scope Not Connected Camera Connected I 8 If everything goes ok an image should appear In the window above i Be PEMPro v2 0 File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Camera Spiral SS SSS id Star Binning Dark arc nins na Pixel 2 Soale erc secs mages Height 376 Duration 1 00 220 g Seconds a o U vs 00 i ne i Images Use Scale Clear From Mai Scope Not Connected Camera Connected 9 If an Image doesn t appear you can try adjusting the Meade DSI settings In PEMPro s menu click Settings gt Meade DSI Settings Ee PEMPro v2 0 Tools Wizards Help Edit ASCOM Driver Settings
217. s mount Rev D use 1 second If you have a Paramount ME try 0 4 seconds If you have an LX 200 use 1 2 seconds For other mounts you should try using 1 second If you have an Astro Physics GTOCP3 control box Rev H firmware or later then you don need to set this parameter because PEMPro can directly program the periodic error correction table in the GTOCP3 controller This saves time as there is no need to wait for one worm cycle to program the mount It is also more accurate than the playback method because the mount receives exact movement commands instead of having to measure and convert autoguider or serial command pulses Advanced Parameters Pulse Dynamics Advanced Configuration Pulse Dynamics Puke Modulo Pube Padding msec imsar AQgTEssWenes5 fF om Est 0 S 10 Pulbe Phase Different East West settings PE Fundamental Frequencies Parameters in this section are optional Usually you will not need to change these parameters from their defaults Pulse Modulo Some mounts cannot respond to movement commands that are too short in time This parameter will send pulses commands to move the mount in units of this time value in milliseconds For instance if you set to 40 milliseconds then only pulses of length 40 80 120 160 etc will be sent or no pulse at all The minimum value is 10 milliseconds Start there and increase the duration if the periodic error was under corrected For Windows 98 M
218. s not alter the raw data in any way just what is displayed in the graph and in the table Adjust Y for Y Drift If checked will recalculate the Y centroids accounting for the 50 point moving average of the trend of the star movement in the Y axis This feature does not alter the raw data in any way just what is displayed in the graph and in the table X Y in arc seconds If checked will multiply the X Y centroids by the Image scale you entered in the setup page It will also repaint the graph X Drift approximate drift in the X Axis horizontal arc seconds second This is only an approximate and can change considerably depending on the phase of the worm gear Y Drift approximate drift in the Y Axis vertical in arc Sseconds second This is only an approximate and can change considerably depending on the phase of the worm gear Initial Phase Used internally to keep track of the phase of the curve between different PE data acquisition runs Frequency Spectrum Tab In this tab you can immediately view the PEC data s frequency spectrum after you load a file for analysis or after you have acquired PEC data File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Lh 1 0 ee o g t p m T s o Yr recon Frequency Spectrum j Total Time Motor Index Wom Cycles Setup Acquire Data Analyze Frequency Spectrum Program Mount Refine EQMOD Show
219. s not have an ASCOM driver then ignore this step Celestron Telescope Part 2 If you haven t already configured the COM port and other settings then click the Edit Driver Settings button and do so Edit Driver Settings When Step 3 is reached the Celestron ASCOM driver should be automatically selected The next thing you should do is verify your ASCOM driver is setup is OK by clicking Edit Driver Settings At the time of this writing the latest Celestron ASCOM driver is 4 2 17 and its setup page looks like this look at the lower left for the version number Make sure that at least the Serial Port Scope Type and Site Longitude and Latitude are set up correctly Celestron Driver Setup Scope Type CGE 1400 T Has GPS Serial Port Mi Track Mode Eq N O Show Hand Control Site Aperture mm 456 Elevation m lo Focal Length mmn 3910 Latitude jor oo oo N Obstruction 2 22 Longitude Joo oo oo E Version 42 17 Help OF Cancel IMPORTANT ASCOM Celestron Driver Version 4 2 17 or later is REQUIRED If you do not have it you can i download from here http www siriusimaging com PEMPro CelestronDriver4217 zip 2 Run the Calibration Wizard before acquiring data Once every session before acquiring periodic data you should run the Calibration Wizard The Calibration Wizard sets all of the important parameters used by PEMPro to accurately calculate periodic error Note that you don t
220. sec Peak to Peak PE 17 57 Arc secs RMS 3 68 Arc secs Arc Seconds 6 00 o 00 10 00 RA Worm Phase Minutes _ All Cycles Visible gt Graph Y Scale Total Time UA Aaa chinese Worm Cycles hia x 20 00 0 35 14 564 3 1 0 Setup Acquire Data Analyze Program Mount Refine RCX 400 PE Files 7 Curve ee nf trvert Rev i Cure PemPro 2006 0 18 193326 ppe Create New PE Curve Subtract 2 from 1 ad Created Curve Geen Save Cunre So under the assumption that any residual periodic error can be added back into the original PEC curve to make a better correction curve used the Create New PE Curve feature and added the before PEC and after PEC curves to get a new curve The new curve is called a Refined curve Setup Acquire Data Analyze Program M PE Files I Curve 1 PemPro 2006 02 17 14 lf Cure PemPro 2006 02 18 14 l Show Full Filename Show 0 Create New PE Curve Subtract 2 from 1 No Curve Subtract 1 from 2 After saving this curve with the Save Curve button clicked Use Curve to load it into the Program Mount graph Setup Acquire Data Analyze Program Mount Refine RCX 400 PE Files 7 Curve PemPro200602 17184735 dcuvesppe Cler info ivet Rev 7 Curve PomPro20060218183328pp Cer nio vert Rev Show Full Filename 7 Show Data Points Create New PE Curve Shift Curve Addiand2 E Curve 1 Red 5
221. shown below Setup Acquire Data Analyze Program Mount Refine RCX 400 PE Curve Firmware 2 0e Oct 18 2005 1 a PEC Residual From rested PE Cure Periodic Error Table Factory PEC _Clear PEC PEC n 00 000 0 000 02 393 0 000 04 787 1 128 07 180 1 128 09 574 11 967 14 361 16 754 19 148 21 1 128 2 256 2 206 3 304 4 794 1 922 3 4 5 6 Fj 2 9 1 0 Once the PEC table has been erased you can very easily synchronize PEMPro to the mount with the Meade Hand Box utility described above Just press the Sync PE button and you are done To get and analyze the raw PE in the mount you must first turn off the mount s PEC To do that press the PEC Off button on the Meade Hand Box utility Once you have done that you can click to the Acquire Data tab in PEMPro and collect data To get and analyze the residual PE in the mount after a PEC curve has been uploaded see below you must first turn on the mount s PEC To do that press the PEC On button on the Meade Hand Box utility You can then proceed as before to measure the periodic error of the mount Getting the PEC curve to the mount After you have done the above 5 steps you can use one of these methods to program the mount 1 Program the mount with a 24 minute cycle 2 Directly upload the curve directly to the mount from the RCX 400 GPS tab The upload only takes a few seconds 3 Save the PEC data to a CSV file and up
222. t No you can still program it later by pressing the To Mount button on the Gemini L4 tab However if you are an advanced user you may to click No so that you can first adjust the settings in the Curve Tweaking group Controls on the Gemini L4 tab are explained below At the top of the graph information about the curve is displayed and dynamically updated if you use any of the controls in the Curve Tweaking section Peak to Peak PE This is the total periodic error of the curve Curve Fit RMS Error This is a measure of how well the curve to be uploaded to the mount matches the optimized curve that PEMPro created The lower this number the better Max Error This is the maximum deviation at any point in the curve to be uploaded from the optimized curve that PEMPro created Ze PEMPro v2 5 EBk File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Peak to Peak PE 6 94 Arc secs Curve Fit RMS Error 0 112 Arc secs Max Error 0 28 Arc Secs 10 0 6 0 0 0 5 0 Arc 5econi 10 0 15 0 20 0 25 0 1 00 2 00 RA Worm Bias kni l B All Cycles Visible Graph Y Scale ee Time pen Worm n Sa yx ox 30 48 E 1 03 03 548 eW 7 9 Setup Acquire Data Analyze Frequency Spectrum Program Mourt Refine Gemini L4 PE Curve Firmware 1 34 GuideRate 0 5k EOR From Created PE Curve PEC Table srowsevearec ClearPEC 0o Phase Value
223. t ASCOM Driver some cases If your mount does not have an ASCOM driver then ignore this step Gemini Telescope Part 2 you havent already configured the COM port and other settings then click the ne Edit Driver Settings button and do so The next thing you should do is verify your ASCOM driver is setup is OK by clicking Edit Driver Settings At the time of this writing the latest ASCOM Gemini driver is 4 2 21 and its setup page looks like this Gemini Controller Setup m E o ed a oq a Run the Calibration Wizard before acquiring data Once every session before acquiring periodic data you should run the Calibration Wizard The Calibration Wizard sets all of the important parameters used by PEMPro to accurately calculate periodic error Note that you don t need to run this wizard if you are analyzing data previously collected Some of the settings established include e Telescope declination e Camera tilt angle e Which axis of the camera corresponds to Right ascension e Image Scale e Telescope movement direction Before starting the Calibration Wizard you should center a 6th 8th magnitude star in the center of your CCD camera The star should be just west of due South and at O degrees declination or higher if you are in the Northern hemisphere If you are in the Southern Hemisphere the star should be just West of due North and 0 degrees declination or lower In either case it is best t
224. t Compensation 0 00000 g 3 A on RA Axis Graph Y Scale Time Phase Worm aa qe les x m 3048 00751 o202 2 22 Setup Acquire Data Analyze Frequency Spectrum Progr Mount Refine Gemini L4 Se Curve Fimwarg 1 34 GuideRate 0 50x PEC Residual FromCeatedPECuve PEC Table _ stowSavedrec Clear PEC c oo Mug Offset Phase Value Court jee Accumulated Pl __From Mount __FromFle al 1 0 0 000 Normal 10 0 00 mo F Pa sel 10 0 374 West 1 0 19 0 19 Tomot as 11 0 411 Normal 39 0 00 0 19 Curve Tweaking TE IRn NEO F R nz ries e ue 07 omal 38 oh ot Ei al ai lE g0 2992 West 1 0 19 0 56 os 7 a1 3 029 Normal 39 0 00 0 56 acre tia g 120 4488 West 1 0 19 0 75 F i patia bs 1 454 Momal 24 UU U 5 aa lt a C invert Curve gt Scope Connected Camera Not Connected From the markers on the drawing above 1 Click the tool button to access the Gemini L4 Extra Adjustments dialog 2 Allows you to reverse the East West direction which in case PEMPro has it wrong would cause drift Reports have not indicated that this needs to be checked so it is best to leave it unchecked 3 When checked the drift adjustment value will be applied to the active curve in the main dialog Note that this just affects the curve in PEMPr
225. t forum for the PEMPro Please post a message there if you have any problems running PEMPro V2 or with the trial or license registration Ok Pressing this will take close this dialog If your trial has not expired PEMPro V2 will start Entering a Full License Key If you have purchased a PEMPro V2 license key simple cut and paste all five lines of the license into the text area in the PEMPro Trial dialog After entering the license information the PEMPro Trial dialog will no longer appear when PEMPro V2 is started Here is an example of what you need to paste into the trial dialog Note that you must include the keyword prefix at the start of each line e g Product Name etc So copy the entire 5 lines into the dialog Product PEMProV2 Name John Xavier Email jxavier user xyZ Date 2007 07 13 RegCode CHjj O tl 9Rx 27 0720 IMPORTANT Treat your full or upgrade license key as confidential information Please do not Share it with anyone A full or upgrade license entitles you to install PEMPro V2 on any number of your own personal computers but note that you are licensed to use PEMPro V2 on mounts or scopes that you personally own Entering an Upgrade License Key IMPORTANT An upgrade license will only work if either the name or email address in the upgrade license is the same in your original PEMPRO V1 license If it is not please contact CCDWare for a corrected license key or a refund if you meant to purchase
226. t know the number of teeth ask the manufacturer or if that is not possible email pempro ccdware com to see if we can find out PEMPro Worm Period Calculator This tool will help you quickly and accurately calculate the worm perod of your mount All you need to know is the number of teeth in the worm gear of your mount Ff you dont know this number ask your manufacturer Teeth in worm gear Worm Period 3829515 OK Cancel Minimum Star Brightness The minimum allowed brightness of the star selected for tracking Periodic Error If no star is found with its brightest pixel at least this bright then PEMPro will not continue Typically 5000 is a good minimum Maximum Star Brightness The maximum allowed brightness of the star selected for tracking Periodic Error It is good to select a brightness at or below that of the saturation level of your CCD camera Log and Image Dir You can either type a directory path or press the button with to the right of the text box to navigate to a directory to use creating the directory if needed The directory will be created if it does not exist IMPORTANT A directory path is required for proper operation to save data during processing PEMPro can upload PEC data directly to some mounts You should use the procedure below if your mount is one of these types Astro Physics 1200GTO with GTOCP3 900GTO with GTOCP3 Mach1 GTO and other mounts using the AP GTOCP3 controller Ce
227. t the bottom of the graph see example picture below Note If after making the recommended adjustment the drift increases you should adjust the mount the opposite of what the direction says If this happens please report this to the PEMPro Beta forum stating your equipment Telescope camera and camera control program whether you are in the Northern or Southern hemisphere and which side of the meridian the scope was pointing c Once you make an adjustment go back to step 10a above Continue making adjustments until the measured drift is less than about 5 arc minutes When the drift value is less than 5 arc minutes over at least the whole 5 minute period you can then proceed to the next step which will allow you to make a precise final adjustment to the Azimuth axis Proceed to that step by clicking Next NOTE Although not shown in the pictures of Step 5 below there are now separate Start Measuring and Stop Measuring buttons present on this step f PEMPro v2 0 Ak File Settings Tools Wizards Help PEC Polar Align Wizard Star Finder Backlash Measure Azimuth Error a Step 5 of 9 tet i nll C View Other Axis DRIFT arc secs vs TIME minutes Stop Measuring The drift value may be unstable for a couple minutes After it settles down note the alignment eror then go make an adjustment to the mount s AZIMUTH Wait a couple more minutes and make further adjustments as needed Adjust CONNIE COCR WISE
228. tes Finding these repeating fundamentals helps you understand your mount and allows PEMPro to remove them RMS Error 2996 Frequency Spectrum Graph of PE Frequency Spectrum 5 110 15 20 25 30 35 140 45 50 156 60 165 70 75 Periodic Error 3779 4142 Click to zoom m Click the magnifying glass button to the lower right of the graph to get a better look at the interesting fundamentals Graph Type Drift Fitting z a Frequency Spectrum 5th Order aa Graph of PE Frequency Spectrum Sete Sues anche Looking at the peaks you can see that the biggest fundamental frequencies occur at 3 5 6 8 9 12 15 18 20 21 24 27 and 30 Note that most of these fundamentals are multiples of three because the Meade PEC mechanism uses 3 worm cycles instead of the normal 1 cycle found in other mounts The reason for doing this is that the 8th fundamental is usually Significant and cannot be corrected with a single cycle of PEC data because it repeats 2 2 3 times in a single worm period and is thus not periodic over only one cycle but over three cycles it will repeat exactly 8 times Now let s edit the fundamentals that PEMPro uses PEMPro Create PE Curve File Export Data Create PE Profile and Close Clicking on Edit Fundamentals brings up the dialog to configure fundamentals edited the list of frequencies to match the peaks noted above Notice that that all important 8th order fun
229. that since the left hand edge of the graph always starts at 0 the whole level of the curve will change as you shift however the Shape and magnitude of the curve will not change Invert Inverts the curve as shown below Invert multiplies each cell of the curve by 1 so it essentially changes the sign of the curve You will need to use this function if after applying a PEc curve to your mount its PE goes up instead of down a Reverse Reverses the order of the cells If there are 200 cells then cells 1 and 200 2 and 199 3 and 198 etc are swapped Usually you will not have to use this function Here is a picture showing this Curve e Reversed Smooth Does a very modest smoothing of the curve The Smoothing consists of doing a weighted average of each cell with its the two nearest neighbors It s purpose is to average out rough spots in the PEC data Usually you do not want to use this function on a PEMPro generated curve You would only use it on a curve that is in the mount that was created by autoguiding Scale Scale is another advanced function It multiplies every cell by the Scale Value You could use it to adjust your PEC curve if your image scale was set incorrectly Clear PEC Fills the entire PEC table with O s IMPORTANT After making adjustments to a PEC curve with any of the above buttons you will need to write it to the mount with the To Mount button Refining the Periodic Error Curve
230. this Instruments MI 500F AP GTOCP3 239 3446959 gt Bisque Tcs 239 3446959 Yes No Sky Watcher Software Bisque Takahashi MI 500G AP GTOCP3 360 239 3446959 Yes Sf eiae Tes 360 230 3446959 Yes No Thesis a ee ee ee ee ee N A Bisque Tcs__ _450_ 191 4757567 _ Yes No__ _TheSky a ee ee ee es es N A Bisque Tes _ _450_ 191 4757567 Yes No __ _TheSky es ee es ee es es Bisque Tcs 640_ 134 6313915 Yes No TheSky Oo S S es es es Bisque Tcs 640 134 6313915 Yes No TheSky C Atlas EQ G All with EQMOD Ea 6893918 Yes Yes EQMOD Sirius EQ G All with EQMOD 638 2525 Yes Yes EQMOD All with EQMOD 180 478 6893918 EQMOD HEQ5 All with EQMOD 135 638 2525 Yes Yes EQMOD All with EQMOD 144 598 3617 E HEZE EQMOD Q3 All with EQMOD 130 662 8007 Yes EQMOD 149 5904349 Yes No TheSky Vixen Notes N A Not applicable N A N A N A o Atx Al 180 478 6893918 Yes N A N A ___SkySensor Equipped Mounts Yes NA MNA The mount does not have the capability to do a direct upload and or there is no manufacturer utility to upload a PEC curve PECTool Celestro PEMPro v1 6 Bui mounts marked n PECTool Id 117 and later can directly upload and download PEC tables to from the Celestron in the above table PEMPro can also read and create files 100 compatible with Celestron s PE
231. tions on the worm wheel itself But we can try to lower the RMS Error in two ways 1 Increase the drift fitting order 2 Configuring the fundamental frequencies Increasing the drift order makes sense in this case because the blue curve does not exactly line up on top of the red data curve changed the drift order to 5th Order to see if could drop the RMS error a bit RMS Error 12 8 15 0 Here is the result Graph Type Drit Fitting RMS Exur Ee Periodic Error th Order Graph of Data and Fitted PE Cure nuana eE Mae 22 386 re The RMS error dropped dramatically which is good Now let s look at the Frequency Spectrum to see if we have the right fundamentals configured To view the frequency spectrum change the graph type to Frequency Spectrum Graph Type This will display the frequency spectrum of periodic error fundamentals The labeled numbers on the top of the graph are multiples of the fundamental frequency That is a value of 8 would be the fundamental frequency that repeats 8 times across the periodic error graph Since the graph s width is about 24 minutes the value at 8 would represent a periodic waveform that happens once about every 3 minutes and thus 8 times in 24 minu
232. to date available ae a Check to see if you need updates for Windows your programs your hardware Change settings or your devices Pick a time to install updates FAQ Pies Get high priority updates Get help and support recommended Use administrator options Select from optional and high priority updates for Windows and other programs Concerned about privacy When you check for updates basic information about your computer not you is used to determine which updates your programs need To learn more see our privacy statement Microsoft Update Privacy Statement 2008 Microsoft Corporation All rights reserved Terms of Use Trademarks Privacy Statement internet G Him 2 Make sure the latest Meade Autostar Suite is installed At the time of this writing AutoStar Suite Version 5 0 is the latest You can check for the latest version here http www meade com support downloads html 3 Make sure the latest version of Meade Envisage is installed At the time of this writing version 7 05 is the latest You can find it here http www meade com support downloads html 4 Make sure PEMPro V2 0 Build 47 or later is installed 5 Connect your camera and start Envisage to make sure your camera is seen by Envisage AA AutoStar Envisage Gan 1 100 7 Monochrome Aign amp Combine Min Evaluation in onocrpoamMe aa Temp Kamel Filter Quality z Lount Obi Offset s 50 L Dark Sub ENA a B Fi
233. to this rate automatically In general the lower the guide rate the more accurate the PEC curve at the expense of a limited correction speed Phase this allows you to slightly alter the phase of the curve up to 5 seconds forward or backward Usually this is set to O but slightly adjusting this value usually to the negative will compensate for any timing errors in the acquired data caused by camera download times Re center this will reset the Phase to 0 0 After adjusting Phase it is sometimes hard to reset it to 0 By the way when one of the track bar controls is selected the left and right arrow keys can be used to adjust the control one step at a time Invert Curve Inverts the displayed curve Use this to flip the curve if the periodic error of the mount is doubled after correction instead of reduced PEC Drift Compensation There s been a lot of issues with RA drift increasing once PEC has been loaded The current version of PEMPro has some features that can allow you to correct excessive drift should it occur after uploading a PEC curve EF PEMPro v2 5 ja Ix ape i PEC Polar in Wizard ie Ander Backlash Peak to Peak PE 6 94 Arc secs Curve Fit RMS Error 0 112 Arc secs Max Error 0 28 Arc Secs 15 0 10 0 Arc Seconds 10 0 15 0 20 0 25 0 PEMPro Gemini L4 Extra Adjustments 3 00 4 00 PecorF 0 00 L Invert East West Drift Adjustment Arc Sec Sec L rif
234. tory PEC checkbox After loading the curve press the To Mount button to finally update the LX200 s PEC At this point you can enable PEC on your LX200 from the Meade Hand Box utility Setup Acquire Data Analyze Program Mount Refine LX 200GPS Firmware 4 0 Oct 18 2005 PEC Residual Periodic Error Table I Factory PEC __ClearPEC ow From File To File maooononoooo oe a S a SS se 1 Ki 3 4 5 6 gt fi 9 1 0 Modifying the Periodic Error Curve Sometimes you may need to do an operation on the entire curve For instance clearing the PEC places a 0 value in each cell of the PEC data Shifting the PEC curve is an advanced feature You might want to shift the PEC curve if you think the PEC curve is out of phase with the mount Usually you will not have to use this capability lt Shift Shifts the curve left by the number of cells in the Shift Value field The cells of the LX200 are about 2 4 seconds each so that represents the time shift of one cell Note that since the left hand edge of the graph always starts at 0 the whole level of the curve will change as you shift however the Shape and magnitude of the curve will not change Here is a picture showing that Note level of entire curve changes Shift gt Shifts the curve right by the number of cells in the Shift Value field The cells of the LX200 are about 2 4 seconds each so that represents the time shift of one cell Note
235. ts i ka No a Eee al ol _ Long exp Count Down Image Process a LU z Autoexp LIVE Ds Image Files Stats Telescope Image Files Histogram Tracking amp Image Scaling A Dark Spot Best Fit BE Draw box around object for tracking 5241 g e a Shadow Auto Contrast Enhance 1 x Magic Eye Focus 5 Close Envisage and start PEMPro It s important that both Envisage and PEMPro do not try to acquire images simultaneously In the drop down list box to the right of Connect Camera select Meade DSI Series Then in the list box to the right select your DSI camera If you disconnect and reconnect your camera or another click this box once or twice and PEMPro will re query the Meade driver for camera changes If you cannot get your camera to appear try completely disconnecting the DSI camera and reconnecting it Lastly double check that you can still get an image with Envisage 2 PEMPro v2 0 Seles File Settings Tools Wizards Help Polar Align Wizard Star Finder Backlash a ps a oo a oon X 1 00 2 00 2 00 4 00 eae RA Worm Phase Minutes g AllCycles Visible T I eS CA Eos Tae Worn Cycles Samples _ _o0044 wa 0 0 Setup Acquire Data Analyze Program Mount Refine AP Raw PE Ap 1200 y AstroPhysics Telescope DSI Pro 3 Use Autoguider Port to Move Scope fi Wom period secs C Southem Hemisphere Min Star Brightnes
236. tware and System Configuration e Windows 2000 Professional Windows XP Home Windows XP Media Center Windows XP Professional Windows Vista and later Windows XP any version is highly recommended e Microsoft Windows Net 2 0 Framework At the time of this writing you can download it from here http www microsoft com downloads details aspx familyid 0856EACB 4362 4B0OD 8EDD AAB15C5E04F5displaylang en e DirectShow Webcam or one of these CCD camera applications o Diffraction Limited MaximDL CCD v3 22 or v4 10 or later or V5 0 or later http www diffractionlimited com o Software Bisque CCDSoft v5 00 170 or later http www bisque com o AstroArt V3 with Service Pack 3 or AstroArt V4 or later http www msb astroart com o Meade Autostar Suite and DSI I II and III series camera More Details Here e The latest ASCOM Telescope Driver installation http www ascom standards org Mounts supported by PEMPro Please click this link for a list of mounts supported by PEMPro IMPORTANT PEMPro can upload PEC data directly to some mounts You should use the procedure below if your mount is one of these types Astro Physics 1200GTO with GTOCP3 900GTO with GTOCP3 Machi GTO and other mounts using the AP GTOCP3 controller Celestron CGE CPC and Nextstar Mounts EQMOD controlled mounts including Orion Sirius EQ G Orion Atlas EO G EQ6 EQS etc Mounts with Gemini Level 4 Meade LX 200GPS and LX 200R wit
237. ubled PE 1 23 arc seconds File Config About i PEMProsim ee eranan n a W Raw PE If Movernents I PEC Table IY Raw PE PEC Table Current orm Phase Current PE alue Y Scale farc secs 1 26 0 0 045 5 10 ConectedPE P02 56 POs FT r 4 974 PORT P08 583 710 989 r13 39 6 717 005 16 206 13 411 T20 614 Relay 0 10 Felay 04 10 Relay 0 20 Relay 0 10 Relay 0 10 Relay 0 10 Relay 0 4 10 Relay 0 10 Relay 0 10 Relay 0 4 10 Relay 0 10 Meade DSI Cameras PEMPro provides native support for the Meade DSI series of cameras The DSI 1 DSI 2 and DSI 3 cameras are supported Requirements Quick start 1 Both Meade and PEMPro require that the Net Framework 2 0 framework be installed There have been additional updates as well so be sure to run Windows Update or Microsoft Update i Winzip Offers the latest critical and security updates device drivers ag WinZip Self Extractor Si features that are available for your Windows a TH SecureCRT 4 1 Make sure to select the Custom button and check all ooptional components for possible Net Framework updates Quick Links Home Worldwide Mi ff Search Microsoft com for Microsoft Update Microsoft Update Home al We E O Ba Automatic Updates f iii to Microsoft Update ped OF Options sai Your computer is set to receive Review your update history notifications when new updates are Keep your computer up
238. ue Asecs 1 0 00 000 1 0 297 F 0 0233 1 0 44 To Fil __ bhe 3 O 04 787 1 0 723 Modify PE Curve 4 0 07 180 1 0 993 Shift Value cells 5 0 09 574 0 1 124 lt Shift Shift 1 6 0 11 967 1 1 376 Modifying the Periodic Error Curve These are the functions you can do to the periodic error curve as a whole lt Shift Shifts the curve left by the number of cells in the Shift Value field The cells of the RCX 400 are about 2 4 seconds each so that represents the time shift of one cell Note that since the left hand edge of the graph always starts at 0 the whole level of the curve will change as you shift however the Shape and magnitude of the curve will not change Here is a picture showing an example of shifting a LX 200GPS curve the principle is the same for the RCX 400 Note level of entire curve changes Shifted Left 20 cells Shift gt Shifts the curve right by the number of cells in the Shift Value field The cells of the RCX 400 are about 2 4 seconds each so that represents the time shift of one cell Note that since the left hand edge of the graph always starts at 0 the whole level of the curve will change as you shift however the Shape and magnitude of the curve will not change Invert Inverts the curve as shown below You would use this button on your curve if the curve causes the mount s periodic error to double instead of reducing it Reverse Reverses the order of the cells S
239. um Program Mount Meade DSi Seres SEEM Worm period secs 478 69 A Min Star Brightness 3 Max Star Brightness v Using The Imaging Source Cameras and Webcams Select Video and click Connect Camera to connect Setup Acquire Data Analyze Frequency Spectrum Program Mount Worn period secs 478 65 The PEMPro Video Interface should start up when you click Connect but because it may take time to initialize PEMPro may pop up a message saying it cannot connect If this happens just click Connect again If you ever see a warning message pop up saying AstroVidTools exe or PEMPro is trying to use the network then allow it IMPORTANT If PEMPro still does not connect to the Video Application the Windows firewall or a virus checker may be blocking communications between PEMPro and the Video application AstroVidTools exe PEMPro and the video application use the UDP protocol to communicate Ports 9125 and 9126 No packets are transmitted off of the machine only between these two applications on the same PC but the firewall may still block communications First try turning off Windows firewall temporarily to see if they communicate If they still do not try rebooting If one of the dedicated ports is randomly used by another application communications cannot occur Rebooting should clear the use of that port Once PEMPro and the Video Interface are properly connected to both the mou
240. unt Fundamentals Period Description 478 70 Worn Drive 7 366 60 Transfer Gear 174 00 Worn bearing ball 172 00 Stepper Gear 10 20 Stepper Transter Dnive gear teeth 473 69 Worm Pernod 1 Frequency Scope Connected Camera Not Connected New Feature Added Full support and for EQMOD mounts This includes direct upload for popular Atlas EQ G Sirius EQ G EQ6 EQ5 etc through EQMOD New Feature Programmable automatic stop allows for very long captures of PEC data New Feature You can now Save the main application window as a JPEG with a menu item or by presssing F12 New Feature You can now display all worm cycles on the graph to get an overall view of the periodic error and trend Tools Wizards Help Edit ASCOM Driver Settings Settings Summary F5 w De Rotate Data Adjust Data for Dedination Calibrate Images when Acquiring Data _w Disconnect Scope on Disconnect Disconnect Camera on Disconnect _ Fundamental Auto Find Eomp Worm Cydes h Keep Main Form on Top E Restore last position when starting Ask for Filename and Comments when Acquiring Data Night Screen Mode Aca ee ol 5 6 Worm Cycles Al Cycles Visible E RA RA Axis Graph Y Scale TET Time Rese Worm on Sania e New Feature Double clicking graph will autosize Y scale to fit the entire graph e New Feature Holding left
241. unts Eqmod Telescope Video C Use Autoguider Port to Move Scope Wom period secs i 478 69 _ Southem Hemisphere Min Star Brightness 3 Max Star Brightness 100000 a Sync Wom Cycle Log and Images Dir C My Documents CCDWare PEMProV2 Step 1a Install PEMPro compatible version of EQMOD From the File menu select the EQMOD installation option Et PEMPro v2 5 mam Settings Tools Wizards Help Load File for Analysis F2 Load Existing Curve Shift F2 Create a PE Curve F3 Export PE Data F4 EQMOD exe was successfully updated here C Program Files Common Files ASCOM Telescope EQMOD exe EQMOD is ready to use with PEMPro Step 2 Connect to the Scope Click Connect Scope and that should open the EQMOD dialog Connect Scope Vie J z Wom period secs 478 69 5 Min Star Brightness 3 s Max Star Brightness Sync Wom Cycle Log and Images Dir CAMy Documents CCDWare PEMProV2 It is important that you have the PEMPro Enhanced version of EQMOD as is shown here EQMOD ASCOMD gt lt 2 PEMPro v2 5 Sag r File Settings Tools Wizards He s ay n PEC Polar Align Wizard Star Finder Backlash ASCOM DISPLAY Make sure the driver says PEMPro Enhanced Arc Seconds PEC OFF 1 00 3 00 4 00 5 00 RA Worm Phase Minutes lt All Cycles Visible gt RA G
242. uploaded see below you must first turn on the mount s PEC To do that press the PEC On button on the Meade Hand Box utility You can then proceed as before to measure the periodic error of the mount Uploading the PEC curve to the mount After synchronizing to the mount you can follow the normal procedure for acquiring data and creating a PEC curve After you have done these two steps you can upload the curve directly to the mount from the LX 200 GPS tab The upload only takes a few seconds Press the From Created PE Curve button Note that the curve will be inverted if the Movement Direction in the Settings Summary is set to Reverse If you don t want the curve inverted change the movement direction to Forward in the Settings Summary dialog and press From Created PE Curve again IMPORTANT If you are in the Southern Hemisphere check Southern Hemisphere on the setup page If you are in the Northern hemisphere make sure this checkbox is cleared Setup Acquire Data Analyze Program Mount Refine L AD0GPS PE Curve Firmware 4 01 Oct 18 2005 From Created PE Curve Periodic Error Table Factory PEC eer PEC Num Wom Phase Raw Value From Mount From File This will load in the PEC data from the curve you just created You can also from this page load the PEC curve from the mount From Mount or from a file From File If you loaded the PEC curve from the mount you can display the factory PEC curve by checking the Fac
243. ure to get it in that range but it is recommended to use a Star that allows you to use an exposure between 0 10 and 1 0 seconds Click on the Acquire Datao tab to reach this page The Start button will be enabled if the camera is connected If it is not go back to the Setup page and press Connect Camera Before pressing the Start button point your telescope to a 5 6 th magnitude star near 0 degrees declination and near the meridian due south in the Northern Hemisphere due north in the Southern Hemisphere If you are working with a German equatorial mount you may want to choose a star just west of the meridian so you do not have to worry about the telescope striking the pier An easy way to confirm that everything is OK is to run the Setup Calibration Wizard immediately before acquiring data IMPORTANT You can also choose a star to the East of the meridian but you should start sufficiently east of the meridian so that the entire acquire data process does not result in the mount crossing the meridian Allowing the mount to cross the meridian might cause complex drift errors from shifting weight that cannot be removed Check the value in the Image Scale field to make Sure it is correct This value should be what you set it to in the Mount Scope Dialog however you can change it here if needed and it will be saved with the other scope mount parameters Note that it is VERY IMPORTANT to set the Image Scale correctly before capturing PE data and a
244. urve i Subtract 2 from 1 Y Curve 1 Red ai aro Phase Adjust This control allows you to precisely adjust how much phase shift occurs when the From Created PE Curve is pressed The curve can shift the curve left or right by up to 480 seconds The value is seconds PE Curve From Created PE Curve From Mount From File To Mount To File These are the functions you can do to the periodic error curve as a whole lt Shift Shifts the curve left by the number of cells in the Shift Value field There are 88 cells total which means that for a mount with 480 seconds each cell is about 5 seconds So the time shift of one cell is about 5 seconds Shift gt Shifts the curve right by the number of cells in the Shift Value field There are 88 cells total which means that for a mount with 480 seconds each cell is about 5 seconds So the time shift of one cell is about 5 seconds Note that since the left hand edge of the graph always starts at 0 the whole level of the curve will change as you shift however the shape and magnitude of the curve will not change If you need to do more precise phase adjustments build a curve with the Create PE Curve dialog and use the Phase Adjust control with the From Created Curve button Invert Inverts the entire Periodic error curve IMPORTANT You would use the Invert button if the PEMPro curve causes your mount s periodic error to double instead of reducing it Just loa
245. writing to the mount then try increasing this delay value E PEMPro Write to Gemini L4 Table fel Write to Curent PEC Table Saved PEC Table Cancel _ Delay between writes to mount From File will load a previously saved PEC file Gemini PEC files have the extension gpe and are simple ASCII text files To File will save the currently displayed PEC data to a file Gemini PEC files have the extension gpe and are simple ASCII text files Show Saved PEC if the From Mount button was pressed this will toggle the displayed curve between the Current Curve and the Saved Curve Clear PEC this will clear the current PEC curve Sampling this controls the sampling size that PEMPro uses to create the curve The lower the value the finer the resolution but the more table entries that are created longer upload download times for PEC curves The default is 10 steps but lowering to 1 might produce a Slightly more accurate curve VERY Important repeated from above The Gemini Level 4 PEC data is directly tied to the guide rate If you program PEC to the mount then you use a different guide rate than what was in effect when PEC was programmed the PEC data will no longer be valid and will need to be reprogrammed or guide rate returned to the original rate GuideRate this controls the guide rate that the PEC is calculated for When the curve is uploaded to the mount the guide rate and the PEC guide rate are set
246. xels This setting determines the size of the tracking rectangle when using a CCD If the drift is high you can increase the size of the tracking rectangle to make sure PEMPro does not lose tracking Dark Subtract Images If checked PEMPro will dark subtract images in the Determine North South East and West step Fixed Exposure Duration If Checked PEMPro will use Max Exposure for all exposures If not checked PEMPro will adjust exposure to make sure the tracking star is in the range of Min Max star brightness Color to Mono MaximDL 4 58 Only If you have a one shot color camera and MaximDL PEMPro can convert the image to monochrome which will produce a more accurate centroid calculation When you check this option another group box to the right becomes visible NOTE Do NOT select this option is you have a monochrome camera Advanced Settings Colorto Mono Setup Camere Type Max Exposure secs 20 F LISAA v Min Star Brightness 1000 Red Mr a eea a ne qN x l m ranma mal PU oe Ld LL PLI Va ee tt ae hal ureei LAL LA ts Binning when ee finding star J bye Blue g 100 00 Fil Tracking Rect pixels 32 w C XOfset _ Y Offset Dark Subtract Images Select File Test Color to Mono MaximDL 4 58 On Fixed Exposure Duration Camera Type LISAA Apogee one shot color cameras the Starlight Xpress SXV H9 and other cameras using the SONY ICX285AQ ICX084AK and similar sensors MX5C Starlight XPr
247. ycles Visible gt eee Ba RA Ansis Graph Scale arin 02 99 sec Total Time Worm Phase Worn Cycles Samples Y 79 00 7 13 ArcSecs 6 43 29 04 35 50 545 The mouse cursor will turn to a cross when positioned over the graph and its position is shown in the fields between Graph Y Field and Total Time All Cycles Visible Normally PEMPro displays data from all cycles shown when All Cycles Displayed is shown Pressing the gt button will allow you to view consecutive pairs of worm cycles so you can easily see the drift and data Each press the gt or lt increments or decrements respectively the pair of cycles visible All worm cycles will return to visibility when you decrement down from 1 2 Visible Tip To quickly go back to viewing all cycles double click the 1 2 Visible for example label Arc Seconds 0 0 50 0 T Ea j 0 00 1 80 00 2 00 00 3 00 00 4 00 00 5 00 00 6 00 00 RA Worm Phase Minutes 1 2 Visible Ey Current R RA Asis Graph 5cale Total Time Wom Phase Worm Cycles Samples Y 79 00 H 6 51 41 04 48 5 545 RA Axis The axis of your CCD images that corresponds to the mount RA axis PEMPro does not know which axis is the RA axis so you must define this You can determine this in a number of ways such as taking a CCD image with the mount tracking turned off The stars will streak in the direction that is the RA axis The Y axis is defined as vertical and the X axis ho
248. you will want to use an ASCOM driver NOTE You do not need to use an ASCOM driver if you have MaximDL V4 or CCDSoft V5 and a connection between your CCD camera and the auto guider port of your mount Custom Commands When checked PEMPro will use the Custom start stop commands as defined by clicking the Custom Commands button This option is of limited use that is it might only be used if the mount s ASCOM driver does not have the ability to enable disable Tracking yet there is a way to enable disable tracking by sending a command string This feature was created to help a user with thios specific issue It will probably be removed in a future release PEMPro Custom Commands Use this window to define custom start stop strings that will be sent to the mount to stop and start sidereal tracking These custom commands are intended to extend the capability of an ASCOM driver that does not have this functionality Note that some ASCOM drivers automatically append starting and terminating characters when sending a command to the mount so you must not include those characters For instance to send QH you just need to enter Q in the field The driver will prepend the and append the To send a binary character use this format lt kHH without the quotes HH is the two character Hex value of the character For instance a space character would be sika ASCOM Stop Mount ASCOM Start Mount Telescope Mount Type S

What is PEMPro? New features in PEMPro V2 and V2.5

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