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sat-nmsACU19 Antenna Controller User Manual

1. Please refer to chapter 8 3 Steptrack 8 4 Adaptive Tracking and 8 5 Program Tracking for more detailed informations about the tracking algorithms Tracking Parameters Page Example Tracking mode OFF CLEAR MEMORY Tracking step size 15 Tracking cycle time 180 sec Measurement delay 1500 msec Recovery delay 4000 msec Level averaging 5 samples Level threshold 75 00 dBm Smoothing interval 6h Peak jitter threshold 0 AZ Maximum model type LARGE EL Maximum model type LARGE C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 24 64 SatService Gesellschaft f r Kommunikationssysteme mbH 5 0 Test Page The page Test displays the electrical logical level of all inputs and outputs of the ACU This helps you to install the ACU or to identify a malfunction of peripheral components Below some information how to interpret the values in this page are given Electrical 1 O Levels The electrical state of an input or output is indicated by the HI LO label displayed with the signal HI means that current is flowing through the optocoupler for this input or output LO means that no current flows As some signals are defined to be true when a switch is opened the electrical level of the signal not necessarily describes the logical level of this signal too Logical 1 O Levels The logical level of an input or output is described by it s color Green means this signal is inactive OK or false Read means the signal is
2. OUT_AUX5 23 OUT_AUX6 not used not used 24 OUT_SUMMARY summary fault relay 1 OK 25 OUT_TRACKING 26 OUT_BCPR1 tracking fault relay 1 OK reserved for beacon receiver frequency select 27 OUT_BCPR2 reserved for beacon receiver frequency select 28 OUT_BCPR3 reserved for beacon receiver frequency select OUT_BCPR4 reserved for beacon receiver frequency select OUT_AUX7 not used 31 OUT_AUX8 not used The meaning of the FWD REV motor control outputs depend on the motor control mode set for this axis Bit definitions in tflt tracking faults The tflt value is returned as a 8 bit hexadecimal number The bit number O means the least significant bit bit number 7 the most significant bit in this number description azimuth peaking fault elevation peaking fault model match fault jitter fault not used not used not used not used 7 5 One line read via TCP IP For compatibility with the sat nms power sensor the ACU also may be polled for an automated monitoring by the requesting the position document with a HTTP GET command Assuming the ACU listens to the IP address 10 0 0 1 the complete URL for the request is http 10 0 0 1 point fmt txt The fmt txt parameter forces the power sensor to reply a one line text document rather than the HTML coded page which is normally displayed by the web brows
3. Date time RS485 address Az step delta AZ Motor driver type AZ Motor timeout AZ Post scale offset AZ Pointing hysteresis AZ Low speed threshold AZ Upper limit El step delta EL Motor driver type EL Motor timeout EL Post scale offset EL Pointing hysteresis EL Low speed threshold EL Upper limit PO Motor driver type PO Motor timeout PO Post scale offset PO Pointing hysteresis PO Low speed threshold PO Upper limit Beacon RX IP address Beacon RX O level Antenna longitude Antenna latitude Antenna abs altitude Inclinometer type Roll offset SNMP system name SNMP system location SNMP system contact MIB File SNMP trap IP 2 SNMP trap IP 4 Admin password 2011 05 16 12 30 56 TERM SatService GmbH ACUODM MIB 192 168 2 14 0 0 0 0 BARRERA SatService Gesellschaft fiir Kommunikationssysteme mbH The antenna may be moved by means of the optional handheld controller The Handheld function is not yet available at ACU RMU and ACU19 Version Startup Set parameter RS485 address on the ACUs Setup page to TERM This enables communication between the ACU and the sat nms handheld Connect the Handheld with the provided cable Handheld 9pol DSUB Power supply ACU Cabinet 15pol DSUB After connecting the Handheld push the Redraw button once The start up screen that shows the C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 32 64 SatService
4. To use this feature store the ACU settings to the target location 0 Target memory page This saves the tracking parameters and the tracking memory as well When this memory location is recalled later on the C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 60 64 SatService Gesellschaft f r Kommunikationssysteme mbH parameters and the memory contents are restored With this function you should keep in mind that the tracking memory contents becomes useless after about 24 hours 8 4 3 Adaptive Tracking Parameters The behaviour of the adaptive is adjustable with a couple of parameters First adaptive tracking also is a step track algorithm The parameters described in chapter 8 3 4 Steptrack Parameters therefore apply to the adaptive tracking as well The parameters concerning the adaptive tracking in particular are discussed in the table below All parameter described here are to be set at the Tracking page AZ Maximum model type These settings let you limit the adaptive model to a simpler one the ACU EL Maximum model type would choose by itself The maximum model type can be set individually for each axis Normally you will set both axes to LARGE which leaves the model selection fully to the ACU s internal selection algorithms In cases where the ACU seems to be too optimistic about the quality of the step track results the maximum model on one or both axes may be limited to a more simple and more noise re
5. 8 9 24V encoder power supply Analog angle sensor potentiometer interface pin signal description type AGND Analog ground OUT Ref Out Reference voltage OUT n c A D converter input center Poti IN Analog ground OUT 1 2 4 5 6 7 8 9 Resolver interface The ACU resolver interface is designed for resolvers with an impedance of 100 Ohms or more and transfer factor 0 5 The interface applies 4Veff 2000Hz to the resolver drive coil It expects 2Veff at the sine cosine inputs at the maximum positions C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 11 64 SatService Gesellschaft f r Kommunikationssysteme mbH When connecting a resolver to the ACU please consider the following e Use a shielded twisted pair cable e Connect the cable shield either to the case of the DSub9 connector or to the ground at the resolver housing Never connect the shield at both ends this will introduce a ground loop and cause a significant degradation of the resolver s accuracy signal description type GND GND resolver SIN IN GND resolver COS IN GND drive signal to resolver OUT n c SIN resolver SIN IN COS resolver COS IN REF _ drive signal to resolver OUT 9 GND J8 Inclinometer Connector Type D Sub9 male This interface is not implemented yet and is reserved for further expansions J9 Compass Connect
6. Back button of you web browser or click to the Setup button on navigation bar Both returns to the setup page without changing the parameter you edited The table below lists the settings provided by this page General This section of the setup page contains some general setup parameters Parameter Description Name Axes The ACU knows two axes control modes The PARALLEL mode treats the control azimuth elevation axes independently If a new pointing is commanded both motors are mode activated in parallel the antenna moves to the new location in the shortest possible time In SEQUENTIAL mode the ACU does not move the elevation axis while the azimuth motor is running The antenna movement is done sequentially First azimuth then elevation You should prefer the PARALLEL mode unless special conditions require a sequential antenna movement The performance of the ACU in terms of pointing speed and wind load compensation will be much better in PARALLEL mode Date By changing this value you can set the internal clock of the ACU The clock is set as soon C 2013 SatService GmbH WWw satnms com ACU 19 UM 1301 Page 26 64 SatService Gesellschaft f r Kommunikationssysteme mbH time you click to the Submit button in the data entry dialog The most precise method to set the time is to enter a time one or two minutes ahead and click to Submit when this time is reached RS485 With this parameter you se
7. the reply is UNKNOWN e Numeric parameters are cut to the limits defined for this particular parameter e Misspelled choice values cause the ACU to set the first value of the choice list e Assigning a value to a read only parameter will cause no fault however the ACU will overwrite this parameter immediately or some seconds later with the actual value 7 2 The TCP IP remote control interface C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 38 64 SatService Gesellschaft f r Kommunikationssysteme mbH Controlling the ACU through the network is done by means of HTTP GET requests Setting parameter values or querying readings or settings all is done by requesting HTTP documents from the ACU The message to the ACU thereby is coded into the URL as a CGI form parameter The ACU replies a one line document of the MIME type text plain The document name for remote control is rmt hence assuming the ACU is listening to the IP address 10 0 0 1 requesting a document with the URL http 10 0 0 1 rmt levi Will let the ACU reply the actual beacon level in a one line text document levi 52 31 This way all parameters may be queried or set you may use your favorite web browser to try out the remote control of the ACU manually 7 3 The RS232 remote control interface Beside the network interface the ACU also provides an RS232 serial port which can be used to control the device remotely Depending on the device address
8. 0 the ACU performs the scaling with this factor With the value 0 the scaling is skipped completely including the conversion of the reading to floating point This ensures that the full accuracy is retained in cases where no scaling is necessary Sense With this parameter you easily can reverse the sense of a position sensor The sense should invert be as follows e Azimuth The antenna looks more to the west for larger values e Elevation Larger values mean higher elevation e Polarization The feed turns clockwise when looking through the antenna to the satellite for increasing values When operated on the southern hemisphere the C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 28 64 SatService Gesellschaft f r Kommunikationssysteme mbH polarization sense must be set the other way round Motor driver type The ACU knows two different configuration modes to control a motor driver They are called DIR START and DUAL START In DIR START mode the FWD signal switches the motor on off the REV signal controls the motor direction This is the configuration many frequency inverters use In DUAL START mode the FWD signal switches the motor on in forward direction REV activates the motor in reverse direction This configuration mode is convenient to control a motor with relays Beside the modes DIR START and DUAL START you may set the motor driver type to NONE which prevents the ACU from controlling the mo
9. 31 GPSFLT GPS receiver fault Bit definitions in obit output bits SatService Gesellschaft fiir Kommunikationssysteme mbH The obit value is returned as a 32 bit hexadecimal number The bit number 0 means the least significant bit bit number 31 the most significant bit in this number no name description OUT_AZ_ FWD azimuth motor forward 1 OUT_AZ_REV azimuth motor reverse 2 OUT_AZ_SPD1 azimuth motor low speed 3 OUT_AZ_SPD2 azimuth motor hi speed 4 OUT_AZ_RESET azimuth motor driver reset OUT_AZ_RESERVE reserved for extended motor control 6 OUT_AUX1 not used not used 7 OUT_AUX2 8 OUT_EL_FWD 9 OUT_EL_REV elevation motor forward elevation motor reverse 10 OUT_EL_SPD1 elevation motor low speed 11 OUT_EL_SPD2 elevation motor hi speed elevation motor driver reset 12 OUT_EL_RESET 13 OUT_EL_RESERVE 14 OUT_AUX3 reserved for extended motor control not used not used 15 OUT_AUX4 16 OUT_POL_FWD 17 OUT_POL_REV polarization motor forward polarization motor reverse 18 OUT_POL_SPD1 polarization motor low speed C 2013 SatService GmbH Wwww satnms com ACU 19 UM 1301 Page 47 64 19 OUT_POL_SPD2 SatService Gesellschaft fiir Kommunikationssysteme mbH polarization motor hi speed 20 OUT_POL_RESET OUT_POL_RESERVE polarization motor driver reset reserved for extended motor control
10. Antenna The Antenna course is an additional offset which is included into the azimuth calibration It is course used for mobile antennas to set the orientation of the antenna without recalibrating it For stationary antennas this value always should be set to 180 Antenna The geodetic longitude of the antenna For a precise orbit to pointing calculation this value longitude should be entered with 0 001 accuracy Antenna The geodetic latitude of the antenna For a precise orbit to pointing calculation this value latitude should be entered with 0 001 accuracy Antenna The absolute altitude over sea of the antenna location abs altitude Orientation Parameter Name Description Compass type Applicable only for car mobile variants of the ACU Inclinometer type Applicable only for car mobile variants of the ACU Nick offset Applicable only for car mobile variants of the ACU Roll offset Applicable only for car mobile variants of the ACU SNMP Control From Software version 2 1 007 or higher the sat nms ACU contains an SNMP agent listening at UDP port 161 The SNMP agent provides a common subset of the MIB II system interface parameters and gives full access to the remote control capabilities of the sat nms ACU with a number of MIB objects placed in the private enterprises tree The actual MIB file defining the ACU s private MIB may be downloaded from the ACU itself by FTP user service password se
11. Gesellschaft f r Kommunikationssysteme mbH installed software version is displayed for a few seconds After that the menu for controlling the antenna is displayed automatically Operation 1 START STOP RESET REDRAW POL STEP POL CCW SIZE cw sat nms ACU Handheld www satnms com STOP Emergency STOP stops all Motors immediately it has to be released by pushing the button RESET Releases the motor lock that was set by pushing the STOP button REDRAW Back to start screen POL Turns the polarisation counterclockwise CCW STEP Selects the step size small steps x keypress x is the value that was set on the setup SIZE screen large steps 10 x keypress continuous mode the antenna moves as long until the button is pushed or a limit switch or limit value is reached POL Turns the polarisation clockwise CW Moves the antenna up EL Moves the antenna to the left AZ HALT Stops the antenna movement only in continuous mode gt Moves the antenna to the right AZ Moves the antenna down EL C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 33 64 SatService Gesellschaft f r Kommunikationssysteme mbH 6 Frontpanel operation The rack mountable version of the sat nms ACU provides a LCD and a small keyboard at the front panel for operating the device locally as an option The capabilities of the front panel operation
12. Maximum model type Lower Antenna mount type AZ Motor driver type 180 000 180 000 0 000000 100000 000000 SSI 13B SSI 13G SSI 17B SSI 17G SSI 18B SSI 18G SSI 19B SSI 19G SSI 20B SSI 20G SSI 24B SSI 24G RESOLVER VOLTAGE NONE 0 000 90 000 AZ Pointing AZ raw pointing AZ Calibration scale AZ Position sensor type atot 180 000 180 000 0 32000 PARALLEL SEQUENTIAL AZ Low speed threshold AZ Step delta Az target value msec AZ Motor timeout Axes control mode 25 samples Level averaging 1000 000 40000 000 200 00 0 00 MHz Beacon RX frequency Beacon RX IP address Beacon RX OV level 5 0000 5 0000 Beacon RX voltage scale SATNMS VOLTAGE Beacon RX type Beacon level btrh 999 00 100 00 Beacon level ripple dBm Level threshold C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 41 64 caps vo 00 FF SatService Gesellschaft f r Kommunikationssysteme mbH Software capabilities 1 Compass type 2 90 000 90 000 Antenna declination 0 99 Delete target 0 0 100 0 AZ Antenna diameter 0 0 100 0 EL Antenna diameter EL Amplitude 360 000 360 000 EL Calibration offset Calculate offset from El value 0 000 2 000 EL Pointing hysteresis NORMAL INVERTED EL Sense invert EL Peaking jitter 0 000 90 0
13. Pin deseriptions 2 2 0 en A nie url ed rear pou 9 4 3 Star UP A AA a a ta aaa 13 4 3 1 Setting the IP Address wc A Ae a es ee 13 4 3 2 Eimit SWIC DOS a A dde is 15 4 3 3 Angle detect iii AAA AAA AAA 15 ASA MOO S NN 15 4 3 9 Ponto Drac 16 4 3 6 Backup of ACU setings eregi rti irae AE Ea E E PA E E RE A AE k 16 NO RR ET T 18 5 1 The Web based User Interface ooocococcnonononononononononononononononononononononononononononononononononononenininenos 18 5 2 Antenna Pomung un es see A A AAEREN eee es 19 33 Target Memory id hate AAA de shade AAA ds a iaol 20 54 Tracking Param ters cirio ea alada ii 21 DD Test Pape nn ann en ti tm da E ti reset 24 NA 26 5 1 Handheld Terminal vaina tt a da sin 32 6 Frontpanel operation A ebenen sinehtee eben De hibenda bes 34 6 1 Display Mode imitado li tail is dee st seecduislees 35 6 2 The main MEU AA AA A A AA 35 6 3 9Elect taigets id dee ALA tit ts 36 AM il E E 36 6 5 Editing Numeric Par meters cia ii iii 36 AA A nennen ana RE ein 37 7 Remote Control er else GL ice bei 38 7 1 General command synl x 2u s erleuchtet ars sales shi ran 38 7 2 The TCP IP remote control interface srn aeni penan non nro nn nn nn non o np aep aa aaa 38 7 3 The RS232 remote control interface oococococonononononononononononononononononononononononononononononononenenininenos 39 C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 1 64 SatService Gesellschaft f r Kommunikationssystem
14. are designed to operate the ACU locally It is possible to select a new target move the antenna incremental set new pointing angles or select another step track mode Advanced configuration parameters are available over the web interface Please start reading at chapter 5 1 for more information Display The 2 line display normally shows the actual target name the angle of the three axes the step track mode and the beacon level During menu operation it is used to view and edit some parameter of the ACU ASTRA 19 2E 175 224 35 756E 12 41P OFF 76 34B LEDs Three LEDs at the front panel signal the summary state of the ACU e The Move LED is on while a motor is on e The Limit LED is on while an end switch of the antenna is activated If so the Alarm LED is also on e The Alarm LED is on while the ACU19 is in alarm state E lem Move Enter EEE EEE BE ne aaa au E Clear Keys The front panel keyboard provides beside the numeric keys four arrow keys and two keys named ENTER and CLEAR Some keys have a second meaning The first meaning of the keys remains constant through most levels of the menu The ENTER key descends in the menu tree accepts and stores changed values The CLEAR key leaves to higher menu levels abandons changes when editing parameters It also resets the alarm buzzer when in display mode The arrow keys navigate in the menu The number keys are to enter nume
15. mode The ACU now moves the antenna following the path described in the file This way of tracking has a couple of advantages e There is no beacon receiver needed e Even very low elevation satellites may be tracked e Also objects which are not in a geostationary orbit may be tracked for a couple of hours provided that the object of interest does not move to fast The main disadvantage of program tracking is that prediction calculations for stationary satellites always are only valid for a couple of days then a new file must be calculated and loaded to the ACU 8 5 1 Practical Usage To use the program tracking facility of the ACU follow the step by step instructions below 1 Create a program txt file with the antenna pointings you want to track SatService GmbH offers a PC Software for this purpose which calculates the antenna pointing from commonly used ephemeris data sets for geostationary satellites You also may create the file by your own means The file format is described in chapter 8 5 2 File Format 2 Set the tracking interval parameter to a value significantly below the intervals between the position entries in the file Setting it to 60 seconds will work with most applications 3 Switch the tracking mode to PROGRAM The antenna will move as defined in the program txt file The ACU polls the file every tracking interval seconds and moves the antenna if it finds a table entry which is time stamped within the
16. set the ACU either runs framed protocol with start stop characters and checksum or it provides a dumb terminal interface The RS232 interface always operates at 9600 baud no parity 8 data bits one stop bit This interface is not yet implemented in the ACU19 and ACU RMU At these versions you have to select NONE to enable the function of optional frontpanel display and keyboard If another setting is selected an optional frontpanel and keyboard has no function If an address A G is selected the ACU expects each message it receives to be packed into a frame as described below description start character always device address A G first character of the message body message body last character of the message body end character always checksum The checksum byte is calculated using an algorithm as implemented by the following formula sum 32 3 byte i 32 modulo 95 2 even i 1 This protocol type is known as MOD95 or Miteq protocol The ACU also packs its reply in a protocol C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 39 64 SatService Gesellschaft f r Kommunikationssysteme mbH frame as described above Incomplete frames checksum errors or address mismatches let the ACU ignore the message The time between the characters of a message must be less than 5 seconds or the ACU will treat the message as incomplete If the ACU is
17. signal is low active i e the ACU expects current flowing through the optocoupler while the driver is OK if the circuit is opened the ACU signals a fault and stops the motor If the motor driver does not provide a fault signal the clamps of the FAULT input must be wired to 0V 24V otherwise the ACU will not move the motor The ACU knows two different configuration modes to control a motor driver They are called DIR START and DUAL START In DIR START mode the FWD signal switches the motor on off the REV signal controls the motor direction This is the configuration many frequency inverters use In DUAL START mode the FWD signal switches the motor on in forward direction REV activates the motor in reverse direction This configuration mode is convenient to control a motor with relays The speed select signal SP1 and SPD2 actually are the same signal but with different logical polarity For most motor drivers it is sufficient to connect one of these two signals select the one which matches the polarity the motor driver expects Very important is how the direction of movement is wired The proper direction depends on if the antenna is operated on the northern or on the southern hemisphere axis northern hemisphere southern hemisphere azimuth FWD moves the antenna to the right FWD moves the antenna to the left westward westward elevation FWD moves the antenna up FWD moves the antenna up polarization FWD
18. the information shown by this page Parameter Description Name Azimuth The bold printed figures show the actual antenna pointing angles as read from the position Elevation sensors If the polarization axis is not controlled by the ACU is displayed in the Polarization polarization field Below the measured angles the ACU displays the target values of the antenna pointing The target values are the angles which have been commanded to the ACU You may click to a target angle in order to change the pointing manually The ACU display a dialog page where you can enter the new pointing angle If you click to the SUBMIT button in this dialog page the antenna immediately moves to the new position To go back to the main page without changing the pointing click to the Back button of your Web browser Below the target values for each axis there is a field reserved which contains some state information for this axis While the motor is running MOVING is displayed at this place If the motor has been stopped due to a fault or an emergency stop request a red label STOPPED is displayed Finally if the ACU recognizes the activation of a limit switch the orange colored label LIMIT is displayed in this field Target name The name of the satellite the antenna is pointing to Click to the name to get a dialog page where you can change the name The name is stored together with a satellite s pointing at the target memory pag
19. turns the feed clockwise FWD turns the feed counterclockwise Look through the antenna to the satellite for the correct orientation of the left right clockwise directions The sense of the position sensors must set that the sensors give increasing values while the antenna moves FWD 8 3 Steptrack sat nms ACUs having the ACU ODM Software Upgrade Step Track installed are capable to track a satellite s position The following paragraph describes how the sat nms steptrack algorithm works Beside plain step track this option includes the so called adaptive tracking and a file program tracking facility as well While step track and adaptive tracking require a beacon receiver to be connected to the ACU the file program tracking works without any beacon measurement 8 3 1 The sat nms Steptrack Algorithm The principle of satellite step tracking is quite simple For each axis move the antenna a small amount away from the satellite move it a small amount to the other site and finally point the antenna to that position where the signal is the strongest The sat nms ACU uses an optimized variant of this method which lets the tracking find the best pointing peak with a minimum amount of depointing Within one step track cycle on one axis the ACU does several very small steps Using the position and beacon level values of all steps in the cycle the ACU calculates the peak position by aligning the approximated antenna pattern
20. when handling the Unit Apply the appropriate voltage according to the attached schematic In case of switching off all the circuit breakers is still voltage available at the mains terminals Only use shielded cable to connect the AZ and EL Motor The other components in the cabinet might be jammed through the harmonic waves the frequency inverters inject into the motor wires e Use only double shielded twisted pair cables e g CAT7 Ethernet cable to connect the resolvers to the sat nms ACU e Only ACU ODU If the Unit is equipped with an optional air ventilation avoid direct contact with jets of water normal rain is no problem C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 6 64 SatService Gesellschaft f r Kommunikationssysteme mbH 3 The sat nms ACU19 The sat nms ACU19 Indoor Module is a full featured antenna positioner or antenna tracking system Together with its motor drivers and power supplies it is completely integrated to a 1RU 19inch case For easy frontpanel operation a display and a keyboard are integrated This chapter gives a short overview to the interfaces of sat nms ACU19 For more detailed informations refer to the chapters below The following pictures show the front and rear view of the unit u 9 Sa u E me 2 Be ne a sat nms ACU19 Front panel view No component No component 1 frontpanel display angle encoder interfaces 2 frontpanel Keyboar
21. 00 EL Upper limit emdt r o character string EL Model type emin 0 000 90 000 EL Lower limit emmx SMALL MEDIUM LARGE EL Maximum model type emot DUAL START DIR START NONE EL Motor driver type epos r o 0 000 90 000 EL Pointing eraw r o 00000000 FFFFFFFF EL raw pointing esca 0 000000 100000 000000 EL Calibration scale esen SSI 13B SSI 13G SSI 17B SSI 17G SSI 18B SSI 18G SSI 19B EL Position SSI 19G SSI 20B SSI 20G SSI 24B SSI 24G RESOLVER sensor type VOLTAGE NONE esth 0 0 10 0 EL Low C 2013 SatService GmbH Wwww satnms com ACU 19 UM 1301 Page 42 64 SatService Gesellschaft f r Kommunikationssysteme mbH speed threshold 0 000 90 000 EL Step delta 0 000 90 000 El target value 0 32000 EL Motor timeout Goto target GPS receiver type 3 00000000 FFFFFFFF Input bits described below Inclinometer type 4 Peak jitter threshold Measurement delay 1 stops all motors STOP at the Web UI 0 releases the stop RESET at the Web UD 90 0 90 0 Nick angle 90 0 90 0 Nick offset character string Note 00000000 FFFFFFFF Output bits described below 180 000 180 000 Orbit position 360 000 360 000 PO Calibration offset Calculate offset from Pol value 0 65535 Peak count 0 000 10 000 PO Pointing hysteresis NORMAL INVERTED PO Sense invert C 2013 SatService G
22. 01 Page 14 64 SatService Gesellschaft f r Kommunikationssysteme mbH IP configuration by serial number or MAC ID Serial number or MAC ID 003056806914 Chip IP configuration 7 Help IP Address 192 168 2 81 Network mask 255 255 255 0 Gateway 192 168 2 254 Interface 2 Index jo Use DHCP Configure default ethernet interface Now the IP configuration of the ACU is completed You may finally want to test if the ACU is reachable now Start your web browser and type the ACU s IP address into the URL field of the browser The ACU should reply with it s main page provided that the ACU and your computer are configured for the same subnet 4 3 2 Limit switches Connect the limit switches to the sat nms ACU19 as described in chapter 4 2 2 Pin description 1 Apply Mains voltage to J12 The sat nms ACU RMU should be reachable via Ethernet now 2 Check the function and correlation of all limit switches manually On the sat nms ACU19 main website a limit fault is shown as soon it occurs On the test page every single limit switch is displayed For more detailed informations see chapter 5 Operation 4 3 3 Angle detectors Connect the angle detectors to the sat nms ACU19 as described in chapter 4 2 2 Pin description 1 Configure the desired type of detector on the setup page 2 Set the soft limits to the expected values at first it is ok if you do this approximately later on you need to type in here th
23. 01 Page 22 64 SatService Gesellschaft f r Kommunikationssysteme mbH If the tracking step seems to be completely out of range you should check if the beacon frequency is set properly The frequency must be the true receive frequency at the antenna entered in MHz not an L band frequency or other IF Tracking cycle time The cycle time specifies how often the ACU shall perform a step track cycle The value is to be entered in seconds In fact the parameter does not specify a cycle time but the sleep time between two tracking cycles This means the true cycle time is the time the ACU needs to perform one step track cycle plus the time entered here 300 seconds 5 minutes is a good starting value for this parameter Inclined orbit satellites probably will require a shorter cycle time very stable satellites can be perfectly tracked with one step track cycle every 15 minutes 900 seconds The maximum cycle time accepted by the ACU is 1638 seconds Measurement delay During a steptrack cycle the ACU positions the antenna to a certain offset and then measures the level Between the moment when the antenna reached commanded position and the beacon level measurement the ACU waits some time to let the beacon level settle The optimal delay value depends on the beacon receiver s averaging post detector filter setting and is a quite critical for the steptrack performance If the delay is too short the beacon voltage does not reach its final v
24. 8 3 3 Smoothing The peak positions found by the step track may jitter due to noise Specially if an almost stable positioned satellite is tracked with a relatively small antenna this jitter may be more than the real movement of the satellite To stabilize the tracking in such situations the sat nms ACU provides a smoothing function which lets you reduce the pointing jitter The smoothing function is based in the fact that most satellites specially that ones which are on a stable C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 54 64 SatService Gesellschaft f r Kommunikationssysteme mbH orbit position require the antenna to follow a small amplitude sine function with 24 hours cycle time in order to track the satellite optimally If you activate smoothing by setting the smoothing time to a non zero value all peak positions of the last n hours get averaged by a sine function which matches the measured peaks at the best After each step track cycle the antenna gets moved to the smoothed position rather than to the recently evaluated peak position The usage of the smoothing function is recommended when tracking satellites where the antenna pointing oscillates less than 25 of the antenna s 3dB beamwidth For tracking inclined orbit satellites the usage of smoothing may be problematic as such satellites may require an significant position oscillation at 12 hours cycle time sin 2wt The smoothing function uses a simple si
25. ADAPTIVE MEMORY PROGRAM Tracking mode 8 NEVER ONCE FOREVER Tracking retry on fault character string Target name 1 1 Reset tracking memory NEVER ONCE FOREVER Tracking retry on fault character string Tracking state Tracking step size wdog OFF ON ON Sends a heatbeat to the AUX 8 output Remarks 1 Software capabilities are summed from the following values 1 step track amp adaptive tracking included 2 polar mount antennas supported 4 memory tracking ingluded 2 ACU variants with compass support provide other choices beside NONE for this parameter 3 ACU variants with GPS support provide other choices beside NONE for this parameter 4 ACU variants with inclinometer support provide other choices beside NONE for this parameter 5 for single step move use following commands command description C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 45 64 SatService Gesellschaft f r Kommunikationssysteme mbH l Azimuth large step left l Azimuth small step left Azimuth small step right Azimuth large step right Elevation large step down small step down small step up large step up Polarisation clockwise step Polarisation counter clockwise step 6 Use the time parameter to read the actual time used by the ACU Use the stim parameter to set the time 7 This parameter reports the description name and point
26. Adjusting the threshold level that adaptive tracking is switched as expected must be done carefully and may require some iterations specially if the beacon is received with a low C N A good starting value for the threshold is 10 dB below the nominal receive level or 2 dB above the noise floor the beacon receiver sees with a depointed antenna whatever value is higher C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 23 64 SatService Gesellschaft f r Kommunikationssysteme mbH To turn off the monitoring of the beacon level this in fact inhibits the adaptive tracking simply set the threshold the a very low value e g 99 dBm Smoothing interval This parameter controls the smoothing function Setting it to zero disables smoothing Smoothing lets the ACU point the antenna to positions evaluated from a simple model calculated from the step track peaks of the recent few hours A detailed description of this function you find at chapter 8 3 3 Smoothing Peak jitter threshold Tf the jitter value of at least one axis exceeds this threshold the ACU raises an model fault If this happens three consecutive times the ACU resets the models of both axes Adaptive tracking will be possible not until 6 hours after this happens During adaptive tracking the ACU evaluates for each axis a figure called jitter The jitter value describes standard deviation of the measured peak positions with respect to the positions calcula
27. If you store to this target location this saves the tracking parameters and the tracking memory as well When this memory location is recalled later on the parameters and the memory contents are restored This may be useful to track another satellite for a couple of hours and then to return to the first satellite If the tracking memory has been saved before the antenna has been moved to the second satellite it may be restored after the antenna returned to the old position You should not use the first target location for general purposes in order to keep it available for the short time storage described above Targets Page Example Target Go Save Delete ADAPTIVE TRACKING MEMORY E 1 19 2 E 1G 11698_8 166 029 34 152 9 131 P 2 8 E AB2 11703982 202 275 32 979 12 300 gt P 3 Intelsat 901 18 214 430 29 924 30 152 gt Ga 19 8 E AB2 Tracking 202 266 32 960 25 000 2 Numeric orbit position 5 4 Tracking Parameters sat nms ACUs with the tracking function installed give access to the tracking mode and the fine tune parameter which lets you adapt the tracking to the individual requirements of the antenna and the satellite C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 21 64 SatService Gesellschaft f r Kommunikationssysteme mbH you are tracking to ACUs without tracking function show an empty page at this place Tracking mode The tracking mode parameter selects the tracking me
28. Many existing antennas are equipped with resolvers The resolver interface module permits to re use these ready mounted and cabled sensors when an old antenna controller is to be replaced by a sat nms ACU The resolver interface board is optimized for the use with 2V type resolvers which are very common The interface board drives the resolver with 4Veff 2000Hz and expects 2Veff at the sin cos inputs The resolver interface has 16 bit binary resolution ANALOG For small antennas with reduced accuracy requirements using analog angle to voltage sensors in fact precision potentiometers is an inexpensive alternative The analog sensor interface board may be set up for several voltages to connect to the commonly used sensor types The analog interface board uses a 16 bit precision ADC with a temperature compensated voltage reference Angle calibration Analogous to the modular position interface hardware concept the ACU software uses configurable drivers to read the different types of position interfaces From the user s point of view the ACU accepts and displays pointing angles as floating point numbers with 0 001 resolution Internally the software treats angles C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 50 64 SatService Gesellschaft f r Kommunikationssysteme mbH as 32 bit integer numbers where the full 32 bit range corresponds to 360 This is equivalent to a resolution of 0 000000084 When the soft
29. active or true Toggling output levels manually The Test page also lets you toggle the actual state of each output signal simply by clicking to the underlined HVLO mark of the signal If you do this you should consider the following e The ACU sets the motor driver outputs eight times a second for each axis having the motor driver type set to DIR START or DUAL START This immediately will overwrite any change you make If you want to test if the motor driver outputs command the motor driver as expected switch the motor driver type for this axis to NONE at the Setup page before you set the outputs manually e The Test page is re read by the Web browser about once a second Some browsers seem to ignore mouse clicks occasionally due to the screen refresh Hardware Test Page Example C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 25 64 SatService Gesellschaft f r Kommunikationssysteme mbH Outputs Outputs Inputs AZ motor forward Lo POL motor forward LO POL limit switch H HI AZ motor reverse LO POL motor reverse LO POL limit switch L HI AZ motor speed 1 HI POL motor speed 1 LO POL motor fault HI AZ motor speed 2 LO POL motor speed 2 LO Antenna hub fault HI AZ motor reset LO POL motor reset LO Auxiliary input 1 LO AZ motor reserve HI POL motor reserve HI Auxiliary input 2 LO Auxiliary output 1 LO Auxiliary output 5 LO Auxiliary input 3 LO Auxiliary output 2 LO Auxiliary output 6 LO Auxiliary input 4 LO EL mot
30. alue the steptrack does not properly recognize if the signal goes better or worse after a test step If the delay is too long the impact of fluctuation to the measures level grows and may cover the small level difference caused by the test step With the sat nms LBRX beacon receiver best results are achieved if the receiver is set to 0 5 Hz post detector filter bandwidth and a measurement delay of 1500 msec Recovery delay After the ACU has done the tracking steps for the elevation axis it waits some time before it starts tracking the azimuth axis This is to let the beacon level settle after the final position has been found A typical value for this parameter is 4000 msec Level averaging When measuring the beacon level the ACU takes a number of samples and averages them The standard value of 5 samples normally should not be changed Larger values will slow down the ACU execution cycle Level threshold If the beacon level falls below this threshold value the ACU does not perform a step track cycle If the level falls below the threshold during the steptrack cycle the cycle gets aborted If the ADAPTIVE tracking is enabled and there is enough data in the tracking memory the ACU computes a mathematical model from the stored data and predicts the antenna pointing position from the extrapolation of the model If the tracking mode is set to STEP the ACU leaves the antenna where it is if the beacon level drops below the limit
31. amage the flash memory quite quickly Memory reset The contents of the tracking memory must be erased when the ACU starts to track a new satellite This is done in the following situations e Astored position target is recalled e The ACU is switched off e CLEAR MEMORY is chosen at the tracking parameters page If a new antenna position is entered by setting the azimuth elevation angles explicitly the ACU does not know the new position is a manually optimized one for the current satellite or the position of another satellite The tracking memory is not erased in this situation If the new position belongs to a new satellite the tracking memory must be erased manually by clicking to CLEAR MEMORY at the tracking parameters page Beside this it is recommended to perform a CLEAR MEMORY about half an hour after tracking a satellite starts the first time This erases the first search steps to the satellite s position and significantly improves the quality of the first adaptive model which will be calculated 6 hours later Saving the memory contents The ACU provides one persistent memory location where the tracking memory may by saved into on an operators request This may be useful to track another satellite for a couple of hours and then to return to the first satellite If the tracking memory has been saved before the antenna has been moved to the second satellite it may be restored after the antenna returned to the old position
32. an Ethernet interface and a web browser like the Microsoft Internet Explorer The ACU runs a web server which acts as a user interface to the antenna controller e The ACU is prepared to read the receive level of a sat nms beacon receiver through the TCP IP interface e The flexible interface design of the ACU enables it to control most types of motor driving antennas for geostationary satellites Supported motor controllers are configurable in the field e Power relays This simple solution is suitable for antennas using 2 speed AC motors e Frequency inverters Speed and acceleration ramps are programmed into the inverter module with this solution e Servo controllers Used for DC motors at small antennas Supported position sensors are separate hardware interface modules for each axis e Resolver Interface The resolver interface module contains a resolver to digital chip which does the decoding of the resolver sin cos signals e SSI Interface SSI is a high speed serial interface used by modern digital position encoders e DC Voltage Interface The third position encoder interface module contains an A D converter which is suited to measure the DC voltages produced by simple inductive angle encoders This application is for small antennas especially in the SNG business The paragraphs below give a short overview to the contents of the documentation A subset of this documentation is stored on the device itself the complete documentati
33. and 18 valid samples the ACU uses the SMALL model If the movement amplitude is above 30 and there are at least 12 hours with 36 valid samples of data available the ACU uses the MEDIUM model The LARGE model requires 48 hours of data with 144 valid samples and an amplitude value of 30 Beside the recorded hours of steptrack the ACU also watches the number of samples With a tracking interval of more than 15 minutes the required times may be longer than shown in the diagram The ACU provides a max model parameter for each axis You may limit the model size to a smaller one than the ACU would choose by itself The other way round it is not possible to force the ACU to use a model it has not enough data for If the tracking results are bad the ACU will not be able to calculate a model and set the model to NONE This occurs also if only one axis have bad tracking results Quality information As mentioned above the amplitude of the satellite s movement is used as a measure of the step track quality This is because the step track measurement uncertainty is an constant angle which primarily depends on the antenna size Beside the amplitude the ACU evaluates for each axis a figure called jitter The jitter value describes standard deviation of the measured peak positions with respect to the positions calculated from the model The figure is also expressed as a percentage of the antenna s beamwidth low values indicate that the model ideally des
34. and how it controls the motors Chapter 8 3 Steptrack describes the step track method used by sat nms ACUs providing this function Chapter 8 4 Adaptive Tracking describes the adaptive orbit prediction tracking method used by sat nms ACUs providing this function Chapter 8 5 Program Tracking describes the program file tracking capability built into the sat nms ACU 8 1 Angle Measurement The sat nms ACU provides exchangeable interfaces for several types of position sensors Position sensor interfaces may be selected individually for each axis This gives a maximum of flexibility for application where the sat nms ACU replaces an existing antenna controller Position sensor types Actually there are three types of position sensor interfaces available for the ACU The interfaces principally are field replaceable however changing interface boards inside the ACU should be done by skilled personnel only ESD protection must be followed when handling the ACU boards The ACU is capable to interface to the following types of positional sensors SSI SSI type digital position encoders are the first choice for antennas which are setup from scratch They are precise reliable and provide a standardized interface The ACU supports types from 13 to 24 bit resolution both gray coded and binary variants The ACU provides 5V and 24V supply voltages 200mA max for the encoders so external power supplies may be omitted in most cases RESOLVER
35. apter 8 3 3 Smoothing 8 4 Adaptive Tracking Adaptive tracking is an extension to the standard step track method The ACU records the tracked positions over several days It computes a mathematical model from the recorded data which is used to predict the antenna position in case of a beacon receive failure The following paragraphs describe how the sat nms adaptive tracking algorithm works 8 4 1 The sat nms Adaptive Tracking Algorithm The motion of a geostationary satellite at the sky mainly is caused by an inclination of the satellite s orbit with respect to the earth s equatorial plane sometimes also by the fact that satellites decelerate in orbit The motion seen from the antenna s point of view can be described as the sum of harmonic oscillations with the frequency being multiples of the reciprocal of an sidereal day The mathematical models used by the sat nms adaptive tracking algorithm to predict the satellite s motion are finite sets of harmonic elements The coefficients of the elements are evaluated from the step track data recorded for several hours or days by means of the least square fit method The more elements are included to a model the better approximation of the true motion is possible On the other hand the number of data points used to evaluate a model is limited the measurements values are distorted due to inaccuracy and noise The more complicated a model is the more susceptible it is to noise For prac
36. ce This chapter describes how to use this interface e Remote Control The ACU outdoor module provides a versatile remote control interface A monitoring amp control software may fully operate the ACU either through a TCP IP network connection or through the RS232 interface of the ACU This chapter describes the communication protocol used for remote control and lists all parameters accessible through the remote interface e Theory of Operation This chapter gives a short overview how the ACU works It also describes the different tracking algorithms and their parameters The interaction with a beacon receiver is described as well Knowing about the theory regarding this functions helps to find the best parameter settings for a given application e Specifications At the end of the document the specifications applicable to the sat nms ACU are summarized in this chapter Support and Assistance If you need any assistance regarding our ACU don t hesitate to contact us We would be pleased to help you by answering your questions SatService GmbH phone 49 7738 9700 3 or 4 Hardstrasse 9 fax 49 7738 97005 78256 Steisslingen www satnms com 2 Germany satnms support satservicegmbh de Version 4 3 2012 11 08 C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 5 64 SatService Gesellschaft f r Kommunikationssysteme mbH 2 Safety Instructions Safety The mains shall only be connected provided with a pro
37. centage of the antenna s half 3dB beamwidth The ACU calculates the beamwidth from the antenna diameter and the beacon frequency Expressing the step size in this relative way keeps the value in the same range regardless of the type of antenna The recommended value for this parameter is 15 20 You may want to start with 20 and try to reduce down to 15 if the signal degradation during tracking becomes too high The tracking step size is a common parameter for both axes If both axes behave differently you can tweak the antenna diameter settings in the setup Specifying a larger diameter makes the ACU using a smaller step size for this axis Tf the tracking step seems to be completely out of range you should check if the beacon frequency is set properly The frequency must be the true receive frequency at the antenna entered in MHz not an L band frequency or other IF Tracking mode The tracking mode parameter switches the steptrack on or off With the operation modes STEP and ADAPTIVE the ACU performs steptrack Level averaging When measuring the beacon level the ACU takes a number of samples and averages them The standard value of 5 samples normally should not be changed Larger values will slow down the ACU execution cycle Level threshold If the beacon level drops below this value the ACU raises a fault signal Steptrack is inhibited while the beacon level is too low the antenna position freezes Recovery delay A
38. cribes the antenna s path High values indicate that s something wrong The step track results may be to noisy at low amplitudes or the model does not fit at all This may be the case if a satellite gets repositioned in the orbit You may set a threshold value for the jitter The ACU raises a fault if at least one axis exceeds the threshold value If this happens three consecutive times the models gets reset all data in the tracking memory gets marked invalid 8 4 2 The Tracking Memory In the tracking memory the ACU records all steptrack peak positions The tracking memory is used as a data source for the adaptive tracking and for the smoothing function as well Each record contains a time stamp the azimuth elevation values and the beacon level measured after the peaking The tracking memory has a fixed size 1000 entries Once 1000 records are stored the memory works in a first in first C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 59 64 SatService Gesellschaft f r Kommunikationssysteme mbH out manner How many days of tracking data fits into the memory depends on the tracking interval The diagram below shows the memory depth vs the tracking interval 12 18 Tracking memory depth days a B 2 4 6 8 18 12 14 Tracking interval minutes The tracking memory is volatile it is erased when the ACU gets reset or switched off Saving the tracking memory in regular intervals to the ACU s flash memory would d
39. d 6 compass and inclinometer interfaces 3 motor and limit switch interfaces 7 remote interfaces analog beacon level input 8 mains input gt 3 1 Frontpanel Display The Display together with the keyboard is your interface for local operation without using e g an external computer It shows all of the desired parameters and gives a quick overview to the actual state of your sat nms ACU19 Please refer to chapter 6 Frontpanel Operation for detailed informations 3 2 Frontpanel Keyboard The keyboard together with the display is your interface for local operation without using e g an external computer Besides the keyboard you find 3 LEDs that show the actual state of the ACU RMU fault state limit switch state motor movement Please refer to chapter 6 Frontpanel Operation for detailed informations 3 3 Motor and Limit Switch interfaces The sat nms ACU19 contains a high power DC motor driver for every axis By this it is possible to connect DC motors directly to the sat nms ACU19 It is possible to adjust the high speed and the low speed of every axis via potentiometers on the rear panel b The limit switches have to be connected here as well for every axis Please refer to chapter h4200 Interfaces to the antenna Pin descriptions for more detailed informations 3 4 Analog beacon level input C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 7 64 SatService Gesellschaft f r Kommunikationssyst
40. del fault If this happens three consecutive times the ACU resets the models of both axes Adaptive tracking will be possible not until 6 hours after this happens During adaptive tracking the ACU evaluates for each axis a figure called jitter The jitter value describes standard deviation of the measured peak positions with respect to the positions calculated from the currently selected model The figure is also expressed as a percentage of the antenna s beamwidth low values indicate that the model ideally describes the antenna s path High values indicate that s something wrong The step C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 61 64 SatService Gesellschaft f r Kommunikationssysteme mbH track results may be to noisy at low amplitudes or the model does not fit at all This may be the case if a satellite gets repositioned in the orbit A typical threshold value is 20 this will detect very early that a model does not fit to describe the satellite s motion If this value causes false alarms too often you may want to raise the threshold to 50 Setting it to 0 switches the threshold monitoring completely off 8 5 Program Tracking Program tracking is a tracking method which lets the antenna follow a path which usually has been calculated by an extern software This software produces a list of time stamp antenna pointing records The list is copied to the ACU and the ACU is switched to PROGRAM track
41. door module shows a table with information like the serial number of the device or the revision 1D and compilation date of the software Help Clicking to this button shows the on line version of this user manual Step Move Clicking to the buttons in this area moves the antenna a small step to the indicated direction For azimuth and elevation small step and large step buttons are provided A small step is the angle defined with the XX step delta parameters at the Setup page a large step is ten times this value With the polarization axis steps always are 1 STOP Clicking to the STOP button immediately stops all motors The ACU indicates a fault A click to the RESET button releases this fault C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 18 64 SatService Gesellschaft f r Kommunikationssysteme mbH RESET The RESET button lets the ACU acknowledge any motor diver faults by activating the reset circuit to the motor drivers for 800 msec All faults internally latched by the ACU are cleared and the target pointing values are set to the values actually read from the position sensors 5 2 Antenna Pointing The Pointing page is the main page of the ACU user interface which shows the actual antenna pointing and some status information The Pointing page automatically refreshes once a second The refresh rate may be adjusted on the setup page from software version 2 1 007 or higher The table below describes
42. ds on the test page while logged in as user Admin Here you can define the password for the admin login Default password is admin When password you are logged in as admin you have full access to all parameters of the ACU including the setup and the tweaks on the test page C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 31 64 General Note 3 7m Antenna Display refresh 1sec Axes control mode PARALLEL Azimuth AZ Antenna diameter 37m AZ Position sensor type RESOLVER AZ Sense invert NORMAL AZ Pre scale offset FEICESSE calc AZ Calibration scale 0 000000 AZ Lower limit 148 000 Elevation EL Antenna diameter 3 7m EL Position sensor type RESOLVER EL Sense invert INVERTED EL Pre scale offset AF2IESSE calc EL Calibration scale 0 000000 EL Lower limit 8 000 Polarization PO Position sensor type RESOLVER PO Sense invert NORMAL PO Pre scale offset 00000000 calc PO Calibration scale 0 000000 PO Lower limit 80 000 Beacon Receiver Beacon RX type SATNMS Beacon RX voltage scale n a Beacon RX frequency 11450 529 MHz Location GPS receiver type NONE Antenna course 180 000 Orientation Compass type NONE Nick offset n a SNMP Control SNMP read community public SNMP write community private SNMP trap community public SNMP traps ENABLED SNMP trap IP 1 192 168 218 SNMP trap IP 3 0 0 0 0 Access Control User password Setup Page Example 5 7 Handheld Terminal
43. e C ASCII Use passive mode 4 Login with username service and password service 5 Now you see on the right side the file system of the ACU like shown on the following picture On the left side you see the computers file system C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 16 64 SatService Gesellschaft f r Kommunikationssysteme mbH S CHIPTOOL FTP Client Eile View Connection BBRaRE gt a8 Dive C I an Bee RE 8 HOME Filename DIRECTORY 30 05 2011 15 2 o DIRECTORY 30 12 1899 00 0 IMAGES DIRECTORY 01 01 2006 00 0 ACUODM MIB 32756 20 05 2011 12 4 pp dat 25 05 2011 15 4 HELP HTM 23092 01 01 2006 00 0 INDEX HTM 396 01 01 2006 00 0 info htm 617 20 05 2011 12 4 KEYS GIF 3752 01 01 2006 00 0 NAVBAR HTM 2547 01 01 2006 00 0 NAVBARBG GIF 268 01 01 2006 00 0 STOP GIF 347 01 01 2006 00 0 target txt 241 01 01 2006 00 0 target 0 txt 245 24 05 2011 14 0 target11 txt 240 01 01 2006 00 0 target2 txt 214 25 05 2011 09 3 target28 txt 241 25 05 2011 09 4 target3 txt 214 25 05 2011 094 TB ERASE GIF 190 01 01 2006 00 0 TB GO GIF 70 01 01 2006 00 0 TB SATEL GIF 108 01 01 2006 00 0 TB SAWE GIF 143 01 01 2006 00 0 Connected to 192 168 2 77 6 Browse on the left side to the desired location to which you like to save the backup 7 Right click the app dat file and choose copy in the drop down list The file will immediately be copied t
44. e If you change the target pointing values the target name is set to unknown by the ACU Hence you first should adjust the antenna pointing then enter the satellite s name sat nms ACUs with the tracking option installed display the actual tracking mode state in this field ACUs without tracking show OFF all the time In STEP and ADAPTIVE tracking modes this field shows what the tracking actually is doing and some information about the tracking data in memory fill tells how many hours of step track data for calculating a model the ACU actually has in memory This data may be used in ADAPTIVE mode to predict the satellite movement in case of a beacon failure The smoothing which may be applied to the step track also relies on this data age means the age of the most recent successful tracking step In other words this describes how many hours ago the beacon was lost in case of a beacon failure Beacon This field shows the beacon level as read from the beacon receiver Depending on the level source defined at the Setup page this either is the beacon level reported by a sat nms LBRX beacon receiver via TCP IP of the level derived from the ACU s analog input Temperature The actual temperature inside the ACU enclosure This value is for information only C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 19 64 SatService Gesellschaft f r Kommunikationssysteme mbH ACU Faults If there are any faults w
45. e exact values 3 Check the rotational direction of the encoders If possible do this by turning the encoder axis directly otherwise you have to move the antenna by hand Maybe you have to invert the rotational direction on the setup page 4 Set the offset of the angle detectors to the desired values by using the calc function If you need more detailed information please refer to chapter 5 6 Setup 4 3 4 Motors Before you connect the motors to the sat nms ACU19 take care the ACU19 is in STOP condition before connecting the motors 1 Click the STOP button on the sat nms ACU19 s website By this you can be shure that no motor movement will occur connecting the motors 2 Connect the motors to the sat nms ACU19 as described in chapter 4 2 2 Click the RESET button on the sat nms ACU19 s website 4 Check the motor rotating directions if necessary change it by interchanging the and wire of the motor cable w C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 15 64 SatService Gesellschaft f r Kommunikationssysteme mbH 5 Drive the antenna in every direction AZ EL and POL until the limit switches stop the motor movement to ensure that the limit switches work well ATTENTION While doing this test it is absolutely necessary to be very mindful to check if nothing collides 6 Set the soft limits to the desired values e g 1 degree before the hardware limit switch is activated 4 3 5 Pointing Trackin
46. e mbH T4 Parameter ls buscas ii del covectlesee 40 7 3 One line Te d via TCP IP ce iczhsencashssehes s aeara ress losia bueesedd sobs ous heenedesi gouds Birse ies cago 48 8 Theory of Operation doy Mess Ponca Sunk Bey Seed poe treat a Gee dele Pong Rene 50 8 Angle Measurement ian vinci nena ie ee ae ee ee na ee ets 50 8 2 Pomting Motor Control ee Rn ae eee 51 O A 52 8 3 1 The sat nms Steptrack Algorithm ooooocccnccnncnnnnnnnnnnnnnonnnononnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnennnos 52 8 3 2 ACU and Beacon Receiver ita 53 B73 D MOON A AAA deen AAA AA 54 8 3 4 Steptrack Parameters A RR 55 SA Adaptive Tracking u un est iaaii e aea a aa ae AEE aa E aE Aa TE ERE En E e AEEA ATEN AT 57 8 4 1 The sat nms Adaptive Tracking Algorithm 0oooooononononononononanonononononononononono nono nonono nono nonononnnnnanos 57 8 4 2 The Tracking Mem ry un en ee et er teren 59 8 4 3 Adaptive Tracking Parameters 22222222222222222020200000000000nnnnn n A KEETE 61 8 3 Program Tracking socero e e aae E a A aa a a ae laicidad 62 8 3 1 Practic l Usage eiii alas aan eb 62 8 3 2 File Fonna t caninas aida 62 8 6 Faults nd Tracking iss metae 2 nenne naar aaa 63 O Specitic tlionsi een ES EEEE TE E AA A A E T 64 C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 2 64 SatService Gesellschaft f r Kommunikationssysteme mbH C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 3 64 Sa
47. e of the beacon level the ACU shall use Available options are SATNMS and RX type VOLTAGE In SATNMS mode the ACU reads the beacon level from a sat nms beacon receiver via UDP in VOLTAGE mode the A D converter input of the ACU is read Please mention that in SATNMS mode the beacon receiver must be set to send UDP datagrams to the ACU ODM Beacon The IP address of the beacon receiver Applicable only in SATNMS mode RX IP address Beacon The scale factor for the analog beacon level input The value must match the scaling of the RX beacon level signal voltage scale Beacon The beacon level which is displayed if the ACU recognizes OV beacon level input RX OV level Location C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 29 64 SatService Gesellschaft f r Kommunikationssysteme mbH Parameter Description Name GPS Defines the type of GPS receiver the ACU uses to read its geodetic location receiver type NONE tells the ACU that no GPS receiver is connected The geodetic position of the Antenna has to be entered manually The ACU synchronized its internal clock to the CMOS clock chip on the board NMEA tells the ACU to expect messages from a NMEA GPS receiver connected to the serial interface at CON8 pins 1 3 The ACU automatically sets the antenna s geodetic location to the values received and synchronizes the clock to the GPS timestamps If no NMEA messages are received the ACU states a fault
48. ediate movement of the antenna This is also valid for tracking faults like a PEAKING FAULT If a fault stay active in one axis and don t disappear during a RESET the tracking stops the operation For example if the polarisation have a fault azimuth and elevation stop the tracking operation C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 63 64 SatService Gesellschaft f r Kommunikationssysteme mbH 9 Specifications Technical Specification Position Encoding Resolver digital SSI and potentiometer with three different interface possibilities Quantization Error Resolver 16bit 0 0055 SSI 13bit 0 0449 16bit 0 0055 17bit 0 0028 19bit 0 0007 Display Position 0 001 resolution Interface to beacon sat nms LBRX or analog voltage input receivers selectable Analog voltage input O to 10V Option Tracking Better than 5 of receive 3dB beamwidth RMS The encoder coupling and Accuracy alignment error should not exceed 0 003 to achieve the specified tracking accuracy The influence of antenna structure thermal error is not considered System Interfaces angle detectors DSub9 female limit switches mini combicon male motors combicon female MNC RJ45 analog beacon SMA female Mains IEC male to M amp C and ACU Ethernet IDU 6 drive limit Azimuth Elevation and Polarization switches 3 angular detectors Azimuth Elevation and Polarization Motor driver High powe
49. eme mbH for connecting a third party beacon receiver the sat nms ACU19 provides an analog 0 10V interface input If you use a sat nms LBRX beacon receiver the level informations as well as the beacon frequency and alarm bits are transmitted by UDP packages via http Please refer to chapter Interfaces to the antenna Pin descriptions for more detailed informations 3 5 Angle encoder interfaces The sat nms ACU19 provides the possibility to connect three different types of angle encoders optical SSI encoders S analog potentiometers A and Resolvers R Please refer to chapter Interfaces to the antenna Pin descriptions for more detailed informations You have to decide at point of order which variant you want to have The angle encoder type is specified by an add on to the name of the unit The sequence is azimuth elevation polarisation An example ACU19 SSA contains SSI interfaces at azimuth and elevation axis and an analog potentiometer interface at polarisation axis 3 6 Compass and inclinometer interfaces The sat nms ACU19 provides an interface to connect a compass and an inclinometer especially for SNG applications Please refer to chapter Interfaces to the antenna Pin descriptions for more detailed informations 3 7 Remote interfaces The sat nms ACU19 provides an ethernet http interface for remote controlling An internal webserver provides a clearly arranged webpage where all settings and states can be monitored and co
50. er The ACU answers a text plain type document which consists of one line As shown in the example below the line consists of a set of keyword value pairs separated by amp characters Within each pair keyword C 2013 SatService GmbH Wwww satnms com ACU 19 UM 1301 Page 48 64 SatService Gesellschaft f r Kommunikationssysteme mbH and value are separated by the character apos 174 688 amp epos 31 456 amp ppos 34 5 amp atar 174 700 amp etar 31 500 amp ptar 34 5 amp blev 64 33 amp temp 63 5 amp obit FFFF0000 amp ibit FFFF0000 amp The format does not use fixed column widths for the values however the precision of floating point values is always as shown in the example An application which parses this string should not rely on the order of the values in the line Future version of the ACU may provide additional values which not necessarily will appear at the end of the line A description of the parameters is given in the chapter Parameter list above C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 49 64 SatService Gesellschaft f r Kommunikationssysteme mbH 8 Theory of Operation This section gives some background information about how the ACU works Chapter 8 1 Angle Measurement describes how the ACU measures the antenna pointing and how it calculates the angles displayed at the user interface Chapter 8 2 Pointing Motor Control describes the way the ACU performs the antenna pointing
51. f the browser window and the actual antenna pointing in the main part of the window The readings automatically refresh once a second The refresh rate may be adjusted on the setup page from software version 2 1 007 or higher The navigation bar at the left contains a couple buttons which build the ACU s main menu Pointing Pointing This button switches back to the main page you already see when you connect mM Tan to the ACU This page displays the actual antenna pointing together with some status A information You also use this page to move the antenna to a certain pointing given as Edna azimuth elevation values Q Test FP Seir Target By clicking to this button you switch to the Target page where you can store Setup Em and recall the antenna pointing for up to eight satellites Info Help Tracking sat nms ACUs with the tracking option installed offer the tracking mode and ar tracking fine tune parameters on this page step Move 4 oS Test By clicking to this button you switch to the Test page The Test page shows the low level I O signals of the ACU It helps you to install the ACU or to identify a nooo a ry y r malfunction of peripheral components Sl Setup This button switches to the Setup page which lets you inspect or change less STOP RESET common parameters which usually are set only once to adapt the ACU to it s working environment Info After a mouse click to this button the ACU out
52. f tracking This is because the model does not get disturbed by the first search steps the antenna does until the optimal pointing to the satellite is found Tracking step size The tracking step size is a very important parameter for the performance of the tracking It defines the size of every depointing step the ACU makes in order to find out where the optimal antenna pointing is Setting too high values will cause significant signal degradations during the step track cycle because the antenna moves a too large amount away from the satellite Setting the value too small will let the beacon level jitter mask the level differences caused by the test steps the antenna will not track the satellite properly The step size is specified as a percentage of the antenna s half 3dB beamwidth The ACU calculates the beamwidth from the antenna diameter and the beacon frequency Expressing the step size in this relative way keeps the value in the same range regardless of the type of antenna The recommended value for this parameter is 15 20 You may want to start with 20 and try to reduce down to 15 if the signal degradation during tracking becomes too high The tracking step size is a common parameter for both axes If both axes behave differently you can tweak the antenna diameter settings in the setup Specifying a larger diameter makes the ACU using a smaller step size for this axis C 2013 SatService GmbH www satnms com ACU 19 UM 13
53. fter the the ACU has done the tracking steps for the elevation axis it waits C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 56 64 SatService Gesellschaft f r Kommunikationssysteme mbH some time before it starts tracking the azimuth axis This is to let the beacon level settle after the final position has been found A typical value for this parameter is 4000 msec Measurement delay During a steptrack cycle the ACU positions the antenna to a certain offset and then measures the level Between the moment when the antenna reached commanded position and the beacon level measurement the ACU waits some time to let the beacon level settle The optimal delay value depends on the beacon receiver s averaging post detector filter setting and is a quite critical for the steptrack performance If the delay is too short the beacon voltage does not reach its final value the steptrack does not properly recognize if the signal gor better or worse after a test step If the delay is too long the impact of fluctuation to the measures level grows and may cover the small level difference caused by the test step With the sat nms LBRX beacon receiver best results are achieved if the receiver is set to 0 5 Hz post detector filter bandwidth and a measurement delay of 1500 msec Smoothing interval This parameter controls the smoothing function Setting it to zero disables smoothing A detailed description of this function you find at ch
54. g Now the setup of all interfaces to the antenna is done By this everything is prepared to configure the ACU19 to the desired operation mode to save targets and finally to set the sat nms ACU19 into service In chapter 5 Operation you find a detailed description of the pointing and tracking parameters To use the function pointing by stating an orbit position you have to configure the Location parameters on the setup page to the geodetic location of your antenna Take care to type in position with enough accuracy 0 0019 For further informations please refer to chapter 5 6 Setup for location parameters and 5 3 Target Memory for using this pointing function 4 3 6 Backup of ACU settings After complete configuration is done and the sat nms ACU19 is set up finally the last step that is recommended to be done is the backup of ACU settings By this way an easy replacement of the ACU ODM could be performed The following step by step description shows how to do this 1 Open the chiptool refer to chapter 3 4 3 1 Setting the IP Address to see where to find and how to install this tool 2 Right click to the desired unit A drop down list will open choose FTP 3 A small window like shown on the following picture will be opened Please double check the displayed IP you might adjust it in the drop down list here Connect Target IP service Password MV Save User and Password Representation Type Binary Imag
55. he standard pin configuration If you have a non standard version please refer to the documentation enhancement that shows the pin descriptions of it 4 2 1 Connector Layout Below the connector layout of the ACU19 is shown The connector type is described together with the corresponding pin description in the following chapter The given connector type says which connector you need on your cable Model satama ACUM 3 CE ent A ne Acer ise ma er eT a k Az Encoder JS El Encoder 6 Pi Encoder J7 ind Je Compas J Remote J10 Remota J Mare 112 mn 4 2 2 Pin descriptions J1 1 32 1 J3 1 Limit switch connectors Connector Type Phoenix contact mini combicon FMC 1 5 4 ST 3 5 High and Low Limit switch for elevation axis The switches are connected directly to the input pairs without any external ground or supply cabling The ACU treats a closed contact as OK contacts have to be opened to indicate the limit reached condition Please note that the left right azimuth and polarization limit switches have to be swapped when the antenna is operated at the southern hemisphere pin signal description type 1 AZ Low azimuth left limit view from behind antenna IN 2 GND EXT 3 AZ High azimuth right limit view from behind antenna IN 4 GND EXT pin signal description type C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 9 64 SatService Gesellschaft f r Kommunikations
56. ing angles for a given target number tdsc 12 e g is interpreted by the ACU as a request to report the target description for target no 12 The reply to this command is something like tdsc ASTRA 19 2 167 335 43 412 15 455 8 ACU variants without tracking support only accept NONE for this parameter Bit definitions in ibit input bits and flags The ibit value is returned as a 32 bit hexadecimal number The bit number 0 means the least significant bit bit number 31 the most significant bit in this number description polarization hi limit polarization lo limit polarization motor fault antenna hub fault reserved reserved reserved reserved azimuth hi limit azimuth lo limit azimuth motor fault emergency stop elevation hi limit elevation lo limit elevation motor fault N_COPEN cabinet open AZMOV azimuth moving elevation moving C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 46 64 18 PLMOV polarization moving 19 MOVING moving summary bit 20 AZTOT azimuth timeout 21 ELTOT elevation timeout polarization timeout 23 TIMEOUT timeout summary bit 24 TRKPEAK peaking in progress 25 LOWBEAC low beacon signal 26 BCRXFLT beacon receiver fault limit switch summary 28 AZSTOP azimuth stopped 29 ELSTOP elevation stopped polarization stopped 30 PLSTOP
57. ion axes This lets the ACU calculate suitable tracking step sizes individually for each axis Step delta This parameter defines size of a step the antenna moves when you click to the arrow buttons on the ACU main page If you are using the arrow buttons to fine tune the antenna pointing manually the best value is the pointing hysteresis described below This lets you move the antenna the smallest possible step when you click to an arrow button For special applications however it might be helpful to set the step delta to a much greater value This parameter is not available with the polarization axis there the step delta is fixed 1 Position With this parameter you set the type of position sensor the ACU shall read for this axis sensor Principally the ACU is capable to read SSI RESOLVER and ANALOG type position type sensors The selected sensor type must match the type of interface board installed in your ACU It is not possible to switch from SSI to RESOLVER or vice versa without changing the interface module When selecting a SSI type position encoder also the number of bits and the encoding scheme must be selected For the position sensor type parameter these values are combined to one name E g SSI 13G means 13 bit Graycode SSI sensor SSI 24B means 24 bit binary encoded SSI sensor Beside the SSI xxX RESOLVER and ANALOG selections this parameter offers the choice NONE which tells the ACU not to read a position encoder at al
58. is calibration parameter is described with the next paragraph 2 Set the soft limits of the axis to preliminary values In most cases this needs not to be very accurate the ACU needs this information to calculate the pre scale offset to shift the encoder overflow outside the used range 3 Optimize the satellite pointing for the reception from a satellite for which the azimuth and elevation values are known 4 Click to the calc label beside the calibration offset 5 Enter the known pointing angle for the satellite and click to submit 6 The ACU calculates and sets the calibration offsets to a value so that the actual pointing is displayed as the angle you entered For the azimuth axis there is another offset which also is taken into account the Antenna course This value is provided for mobile applications where a compass reading has to be included into the azimuth value Calibration Normally the ACU assumes that the full range of a position sensor corresponds 360 If you scale are using a multiturn position sensor or if the position sensor is mounted to the shaft of a gear rather than to the antenna axis directly the position sensor reading must be scaled The displayed angle is computed as follows displayed value raw reading pre scale offs scale pos scale offs Mathematically a scale value of 1 0 disables the scaling Beside this the ACU also accepts the special value 0 to disable scaling at all If you set 1
59. it is possible to select a saved target To navigate between the targets use GU Press Dto recall a selected target ASTRA 19 2E 175 224A 38 756 12 41P MEHU SELECT TARGET ASTRA 19 2E 175 224A 38 756 12 41P 22 ASTRA 49 26 175 22438 D6 12 410 After a target recall the display returns to the main menu Press Gto return to the default display or wait about a 1 minute for automatically return 6 4 Step move The antenna can be moved over the front panel with the STEP MOVE menu The corresponding keys are listed below 7 Move the polarization counterclockwise Move the polarization clockwise 1 don a 2 4 6 Move the elevation up Move the azimuth east Move the azimuth east ASTRA 19 2E 175 224A 33 756E 12 41P STEP HOVE Press CLR to leave Press a key one time moves the antenna one step in the corresponding direction The step size is defined at the Web interface 6 5 Editing Numeric Parameters C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 36 64 SatService Gesellschaft f r Kommunikationssysteme mbH To change a numeric parameter like Azimuth Elevation or Polarization Here an example for the azimuth axis select SET AZIMUTH from the main menu ASTRA 19 2E 175 224A 39 706E 12 41P MENU SET AZIMUTH The lower display line shows the actual value You enter the new value using the number keys The digits fill the entry field from right to left like w
60. ith a pocket calculator The key may be used to delete the last digit ASTRA 19 2E 175 224A 38 756E 12 41P SET AZIMUTH 175 224 45 To accept the edited value press ED This checks the entered value against its limits and executes the parameter change Pressing E twice the first key press clears the display leaves the editing mode without changing anything 6 6 Set tracking mode In the SELECT TRACKING MODE menu you can change the tracking mode as shown below OFF STEP ADAPTIVE PROGRAM For detailed information about tracking please refer to chapter 8 3 Step Tracking chapter 8 4 Adaptive Tracking and chapter 8 5 Program Tracking C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 37 64 SatService Gesellschaft f r Kommunikationssysteme mbH 7 Remote Control The sat nms ACU may be controlled remotely by a monitoring and control application either through the TCP IP interface or through a serial RS232 interface RS232 not yet implemented in ACU19 and ACU RMU Both communication methods use the same commands and parameters However there are different frames around each message depending communication method used Controlling the device from the web interface the TCP IP remote control interface or via the serial interface is completely equal commands may sent to any interface at any time the ACU will use the parameter it receives last 7 1 General command syntax The ACU knows a number of pa
61. ith the ACU they are displayed in this field If there is more than one fault at a time the ACU concatenated the fault descriptions More detailed information about faults are available in chapter Faults and Tracking If one axis stops operation due to a fault the step tracking also stopps operation Possible faults are EMERGENCY Someone opened the emergency stop circuit The ACU stopped all STOP motors and stays in this state until the RESET button at the navigation bar is clicked HUB FAULT The ACU detected a hub fault condition CABINET The ACU detected a cabinet open condition OPEN BCRX If the ACU reads the beacon level via TCP IP from a sat nms LBRX TIMEOUT and the latter does not respond a BCRX TIMEOUT fault is reported Tracking If the ACU has the tracking option installed any faults of the tracking module are shown Faults in this field With tracking option this field is always empty AZ EL If the ACU has the tracking option installed and ADAPTIVE tracking is selected these Tracking give some information about the model of antenna satellite movement the ACU has State calculated from the step track data M model The complexity of the model the ACU uses small medium large With a small amount of tracking data available the ACU uses a smaller less complex model than with a completely filled tracking memory A amplitude The amplitude of the antenna movement in this axis expressed as a percentage of the d
62. l With this selection you can tell the ACU if the polarization is not to be controlled by the ACU If you are using multiturn SSI encoders you will have to scale the reading See Calibration scale below C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 27 64 SatService Gesellschaft f r Kommunikationssysteme mbH Pre scale The pre scale calibration offset is added to the raw position encoder reading before scaling is offset applied The pre scale offset is defined as an 8 digit hexadecimal value in normalized position encoder ticks 00000000 FFFFFFFF equivalent to the full range of the encoder 0 360 with single turn encoders The pre scale offset must be adjusted to avoid any 7FFFFFF to 8000000 overflow within the used range of the encoder The value is added to the encoder reading neglecting an overfly eventually occurring Thus the offset implements a 360 turnaround automatically The pre scale offset may be computed and set manually or by assistance of the ACU s automatic calibration function as described below Post scale The post scale calibration offset is added to the position value before the angle value is offset displayed but after the scaling is applied The post scale offset is defined in degrees of AZ EL POL The ACU provides a function to calculate and set both the pre scale and the post scale offset from a known pointing 1 Set the calibration scale gear ratio for the axis th
63. lect the device address used control the ACU through a serial address interface See chapter 7 3 The RS232 remote control interface for more information about this At ACU RMU and ACU19 this parameter has to be set to NONE If you use a sat nms Handheld this parameter has to be set to TERM The Handheld function is not implemented in ACU RMU and ACU19 Version Watchdog The AUX 8 output may be configured to act as a heartbeat output If enabled the output pulse on switches every 1000 ms between on off If using this signal for an external watchdog circuit AUX8 be aware that in adaptive tracking mode delays of some seconds are possible while the acu calculates the orbital model Display With this parameter you select the refresh rate of the ACU s main window This parameter is refresh available from software version 2 1 007 or higher Note The ACU s pointing page by default shows the title Antenna pointing By entering a different text here you can make the ACU show a customized title Azimuth Elevation Polarization The Azimuth Elevation Polarization sections contains the parameters which are specific to the individual axis They are the same for each axis Parameter Description Set this parameter to the dish diameter Units with the tracking function installed use this value to estimate some tracking parameters With offset antennas the diameter settings are different for the azimuth elevat
64. mbH www satnms com ACU 19 UM 1301 Page 43 64 SatService Gesellschaft f r Kommunikationssysteme mbH pmax 0 000 180 000 P PO Upper limit pmin 180 000 0 000 PO Lower limit DUAL START DIR START NONE PO Motor driver type 90 000 90 000 PO Pointing 00000000 FFFFFFFF PO raw pointing 0 000000 100000 000000 PO Calibration scale SSI 13B SSI 13G SSI 17B SSI 17G SSI 18B SSI 18G SSI 19B PO Position SSI 19G SSI 20B SSI 20G SSI 24B SSI 24G RESOLVER sensor type VOLTAGE NONE PO Low speed threshold 90 000 90 000 Pol target value 0 32000 PO Motor timeout character string Admin password pwdu character string z User password 90 0 90 0 Roll angle 90 0 90 0 Roll offset 0 99 Save target 0 65535 Save count O 65535 Sleep time up to the next tracking action Smoothing interval character string Device serial no command Step move 5 character string Date time 6 sver r o character string Software version tage r o h Tracking model age C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 44 64 SatService Gesellschaft f r Kommunikationssysteme mbH tcyc 1 1638 sec Tracking cycle time 100 9999 Recovery delay HH Temperature 0 99 character string Target description 7 Tracking fault bits described below Tracking memory character string Date time 6 Lo 1 Log to tracking memory OFF STEP
65. nation address The setting VOLTAGE is used with any other type of beacon receiver or with a sat nms LBRX beacon receiver which has no TCP IP connection to the ACU When operating in SATNMS mode the ACU will automatically determine the beacon frequency from the sat nms beacon receiver Also the beacon receiver s background activities like frequency tracking and noise reference measurements get synchronized to the step track sequence in this mode These features are not available in the VOLTAGE operating mode Beacon RX IP address You need to enter the beacon receiver s IP address in dotted quad notation here if the receiver tape is set to SATNMS Beacon RX voltage scale These parameters define the slope and offset of the beacon level voltage The Beacon RX OV level values must be set to match settings of the beacon receiver With the sat nms LBRX beacon receiver you can set these parameters there as well chapter C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 55 64 SatService Gesellschaft f r Kommunikationssysteme mbH 8 3 2 ACU And Beacon Receiver explains how to find the best settings for this The parameters in the table below are to be set individually for each satellite They are set at the Tracking page and stored with each target memory Beacon RX frequency This parameter is only of interest if a third party beacon receiver is used The beacon frequency you must enter the f
66. nd J5 J6 and J7 Angle encoders C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 10 64 SatService Gesellschaft f r Kommunikationssysteme mbH Connector Type D Sub9 male The sat nms ACU19 provides the possibility to connect three different types of angle encoders optical SSI encoders S analog potentiometers A and Resolvers R You have to decide at point of order which variant you want to have The angle encoder type is specified by an add on to the name of the unit The sequence is azimuth elevation polarisation An example ACU19 SSA contains SSI interfaces at azimuth and elevation axis and an analog potentiometer interface at polarisation axis The integrated interface type is also written on a label near by the angle encoder connectors SSI encoder interface The SSI positional encoder may be powered from the ACU internal power supply 5V and 24V clamps are provided at the connector To avoid ground loops the cable shield should be connected either to pin 1 at the ACU or to the ground at the encoder housing never at both ends The power supply outputs are internally fused Be aware not to cause a short circuit If this happens the unit has to be opened and the fuse has to be replaced Do not open the unit by yourself you will loose warranty in that case pin signal description type SSI data SSI clock encoder power supply SSI clock 3 4 5 6 SSI data 7
67. net cable Usually an Ethernet hub is used to connect the ACU the LBRX and the controlling computer With a sat nms LBRX beacon receiver some additional features are available for the tracking e The beacon receiver sends the actual level as UDP packets over the LAN The ACU ODM receives this value without any accuracy degrading due to cascaded digital to analog analog to digital conversions e The ACU reads the beacon frequency from the LBRX at the start of each tracking cycle The value read from the receiver overwrites the value set by the operator and is used to calculate the antenna s beamwidth e The ACU informs the sat nms LBRX when a tracking cycle starts and when itends The LBRX suspends any background activities like noise reference measurements or frequency tracking This ensures that the beacon receiver recognizes level differences without a delay during the tracking cycle For a well functioning step track with a third party receiver it is important to adjust the voltage level range to the scale and offset provided by the beacon receiver If at the beacon receiver these values may be adjusted too a preferable scale is 0 5V dB for 20dB usable range The offset should be adjusted that the receive level at clear sky conditions leave a headroom of 3dB at the top end of the range The analog voltage never should reach the physical limit of 0V 10V under normal conditions Clamping the level voltage probably will misslead the tracking
68. next tracking interval Be aware that the clock in the ACU must be set precisely to make the feature work as expected 8 5 2 File Format The program txt file is a plain text file containing a three or four column table Empty lines are ignored comments starting with a as well The numbers in the table are parsed as floating point numbers which only may consist of decimal digits one decimal point ans an optional leading if negative The columns must be separated by an arbitrary number of space or tabulator characters They have the following meanings 1 time stamp The time stamp must be a Julian date with the time of day coded as a fraction of a day Example The Julian date for the common base of most computer clocks 1970 01 01 00 00 00 is 2440587 5 2 azimuth The azimuth angle in degrees angle C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 62 64 SatService Gesellschaft f r Kommunikationssysteme mbH 3 elevation The elevation angle in degrees angle 4 polarization The polarization angle in degrees This column is optional no polarization pointing is angle commanded if this column is missing Memory space is very limited in the ACU ODM The file size is limited to 64 Kbytes being equivalent to about 12 days of AZ EL data in 10 minutes intervals 8 6 Faults and Tracking There are different faults which could occur during operation Please also refer to chapter Operati
69. ntrolled Please refer to chapter Operation and Remote control for more detailed information A serial interface RS232 is available on demand 3 8 Mains input The sat nms ACU19 already contains all internal needed power supplies As they are wide range types it is possible to connect nearly all worldwide available single phase mains Please refer to chapter Specifications for more detailed informations C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 8 64 SatService Gesellschaft f r Kommunikationssysteme mbH 4 Installation The following chapter describes how to install the ACU19 mechanically and electrically Additional a detailed start up procedure is given in this chapter 4 1 Mechanical installation The sat nms ACU19 is completely integrated into a 1RU 19inch case with standard mounting holes The case of the sat nms ACU19 is not strong enough to carry the complete unit only on the front mounting holes Because of that take care that the sat nms ACU19 is placed onto a bar guide that carries the complete weight of the sat nms ACU19 The screws have to be fixed properly to keep the sat nms ACU19 in its position 4 2 Interfaces to the Antenna Pin descriptions ATTENTION Electrical installation shall be carried out only by qualified personnel who are instructed and aware of hazards of electrical shocks All connectors of the sat nms ACU19 are located at the rear side of the case The following chapters show t
70. nusoidal model which does not provide this double frequency component Hence applying the smoothing function for such a satellite with more than 3 hours smoothing time may average the antenna movement path too much 8 3 4 Steptrack Parameters The behavior of the satellite step track is adjustable with a couple of parameters This permits to tune the step track performance for special preconditions arising from the antenna and also the satellite The first parameters listed below are setup parameters they are set once for an ACU installation to adapt the ACU to the antenna and the beacon receiver AZ Antenna diameter The diameter values are used by the ACU software to evaluate the antenna s EL Antenna diameter beamwidth There are separate values for both axes to handle offset antennas as well Beacon RX type With this parameter you specify which type of beacon receiver For a sat nms LBRX beacon receiver set it to SATNMS and set the receiver s IP address accordingly To make ACU and beacon receiver work together you should take care of the following e ACU and beacon receiver must be connected to the same Ethernet segment e Both devices must have assigned IP addresses in the same subnet e The LBRX beacon receiver must be configured for the correct LO frequency The displayed receive frequency must be the true RX frequency rather than the L band frequency e At the sat nms LBRX the ACU s IP address must be set as the UDP desti
71. o the location shown on the left side If you have saved targets you might backup them in the same way They are named targetXX txt XX represents the number of the target 8 To copy a backup file to the ACU browse on the left side if the window to the desired app dat and copy this file to the ACU in the same way right click gt copy 9 After copying an app dat file to the ACU you have to reboot the unit power off By next starting up the new app dat file will be used C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 17 64 SatService Gesellschaft f r Kommunikationssysteme mbH 5 Operation The sat nms ACU outdoor module is designed to be controlled over a network link using a standard web browser This means in practice that the user interface to the ACU appears in your browser window after you type in the ACU s IP address in the address field of the browser program Operating the ACU is mostly self explanatory 5 1 The Web based User Interface After having connected the ACU to a power supply and set the ACU s IP address you can access the ACU s user interface To do this start your favorite web browser program Internet Explorer Netscape Navigator Opera or what else program you prefer At the address field where you normally enter the URL of a web page you want to see type in the IP address of the sat nms ACU you want to control The ACU shows a web page consisting of a navigation bar at the left side o
72. on Below is a collection of all this faults There are the following cases for a fault of one axis TIMEOUT and FAULT are releasable during a tracking cycle A STOPPED fault have to be released with the RESET button Jump Values of angle encoder 5 in azimuth and elevation or 10 in polarisation STOPPED Antenna moves 5sec into the wrong position STOPPED Motor timeout occur because of no antenna movement within the entered time TIMEOUT Motor fault input triggered for example from frequency converter FAULT There are the following cases for a STOPPED fault of all axes together which have to be released with the RESET button e Trigger emergency stop input e Click the STOP button on the web interface All faults are released by clicking the RESET button on the web interface or by sending the remote command mrst 0 The RESET button activates the MOTOR RESET outputs of all three axes for a quarter second and delete the fault flags All target angles are set to the actual value to suppress an immediate movement of the antenna If a TIMEOUT or FAULT occur during a tracking cycle in one axis and the cycle is canceled the ACU will retry after 2min again according to the setting of Retry after motor fault NEVER ONCE FOREVER The retry is a RESET which activates the MOTOR RESET outputs of all three axes for a quarter second and delete the fault flags All target angles are set to the actual value to suppress an imm
73. on is available on the sat nms documentation CD and at www satnms com e Safety Instructions This chapter gives an overview about the safety precautions that have to be C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 4 64 SatService Gesellschaft f r Kommunikationssysteme mbH observed during installation operation and maintenance e Unit Overview The installation chapter gives informations about the different modules that are integrated in the ACU not ACU ODM and ACU19 e Installation Start up The installation chapter guides through the installation and setup of the ACU outdoor module It describes the mechanical concept of the ACU and the assignment of the ACU s connectors It gives you informations about the starting up procedure Finally you learn in this chapter how to set the ACU s IP address which is a essential precondition to operate the ACU by means of a web browser e Operation The sat nms ACU is operated using a standard web browser like the Internet Explorer on MS Windows based computers The user interface design is straight forward and clearly structured Operating the ACU is mostly self explanatory Nevertheless the Operation chapter outlines the map of web pages which make up the ACU user interface and elaborately describe the meaning of each alterable parameter e Frontpanel Operation The sat nms ACU19 and the sat nms ACU RMU optionally are equipped with a frontpanel Human Machine Interfa
74. or Type D Sub9 male This interface is not implemented yet and is reserved for further expansions J10 Remote serial Connector Type D Sub9 male This interface is not implemented yet and is reserved for further expansions J11 LAN Connector Connector Type RJ45 male J11 is the Ethernet 10Base T RJ45 connector Use a standard network cable to connect the sat nms ACU RMU to an Ethernet hub If you want to connect your computer and the ACU directly without using a hub you need a crossover cable for this with swapped RX TX lines pin signal description type 1 TX default Ethernet cabling 10Base T OUT C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 12 64 SatService Gesellschaft f r Kommunikationssysteme mbH OUT IN IN J12 Mains input connector Connector type IEC male The sat nms ACU19 already contains all internal needed power supplies Use any standard cable type with IEC connector As they are wide range types it is possible to connect nearly all worldwide available single phase mains Please refer to chapter Specifications for more detailed informations 4 3 Start up This chapter describes how to install and start up the sat nms ACU19 It is a step by step description without detailed description If you need more detailed description for e g some parameter settings please refer to chapter 5 Operation all of the parameters are described here Befo
75. or forward LO Summary OK HI AZ limit switch H HI EL motor reverse LO Tracking OK HI AZ limit switch L HI EL motor speed 1 HI Beacon RX preset 1 LO AZ motor fault HI EL motor speed 2 LO Beacon RX preset 2 LO Emergency stop HI EL motor reset LO Beacon RX preset 3 LO EL limit switch H HI EL motor reserve HI Beacon RX preset 4 LO EL limit switch L HI Auxiliary output 3 LO Auxiliary output 7 LO EL motor fault HI Auxiliary output 4 LO Auxiliary output 8 HI Cabinet door open HI Flags Analog AZ moving LO Temperature IBA Sc EL moving LO Beacon level 82 53 dBm POL moving LO Nick 81 2 Roll 90 0 AZ motor timeout LO AZ raw pointing 1D1A0000 EL motor timeout LO EL raw pointing 84660000 POL motor timeout LO POL raw pointing E3840000 AZ coefficients EL coefficients 9 6 Setup 2 19094E 02 1 21731E 02 2 26467E 02 2 75028E 01 4 54165E 02 2 37250E 02 The page Setup contains the ACU s installation parameters The page displays a table with the parameters actually set Each parameter value is a hyper link to a separate page which lets you change this parameter This parameter change page shows the actual parameter setting either in an entry field or in a drop down box You may change the parameter to the desired value and then click to the Submit button to pass the changed value to the ACU ODM The ACU automatically returns to the setup page when the parameter has been changed To cancel a parameter modification you already started either use the
76. osition is reached twice the resolution step size of the position sensor encoder must be set Common values are bit resolution angular resolution recommended hysteresis 13 bit 0 0442 0 0902 16 bit 0 0052 0 0122 17 bit 0 0039 0 006 If the motor control loop still oscillates with the recommended hysteresis values this is due to the off carriage of the antenna drive Either turn down the motor speed at the motor driver unit or enlarge the hysteresis value in this case Motor drive signals The sat nms ACU ODM the core module provides a number of output signals to control a motor driver unit These signals they are available for all three axes are Depending on the motor driver type configured this signal generally switches the motor on for both directions or for the forward direction only Depending on the motor driver type configured this signal reverses the motor direction or it activates the motor in reverse direction This signal is active while the ACU wants to run the motor slowly C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 51 64 SatService Gesellschaft f r Kommunikationssysteme mbH This signal is active while the ACU wants to run the motor fast The ACU activates this signal for 800 msecs if the operator clicks RESET The signal may be cabled to an input of the motor driver which resets latching faults The ACU monitors this signal all the time The
77. ouble 3dB beamwidth J jitter The jitter of the antenna movement in this axis expressed as a percentage of the double 3dB beamwidth Time The actual time of the ACU s internal clock Antenna Pointing Page Example Azimuth Elevation Polarization 219 089 27 471 70 049 Target value 219 080 Target value 27 461 Target value 70 082 Target name SES4 22 W RX 11451M003 Tracking mode ADAPTIVE SLEEPING sleep 317s fill 111 1h age 0 0h Beacon level 82 54 dBm var 0 00 dB Temperature 36 8 C ACU Faults Tracking Faults AZ Tracking State M SMALL A 11 J 1 B 0 496 S 0 056 EL Tracking State M SMALL A 15 J 2 B 0 496 S 0 050 Time 2012 11 27 12 42 37 GPS State DISABLED 5 3 Target Memory C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 20 64 SatService Gesellschaft f r Kommunikationssysteme mbH The page Targets gives access to the ACU s target memory The ACU is capable to remember the pointing and tracking parameters if the ACU has the tracking module installed of up to 99 satellites Managing these memories is done with the Targets page The page displays a table with all pointings actually stored By clicking the icons in the table settings may be stored recalled or deleted Go If a memory location has stored a pointing the table shows a blue arrow in the Go column of the table Clicking to this arrow recalls the settings stored for that target and moves
78. quired e The sat nms ACU19 itself e Mains power at connector J12 e A Computer running a Microsoft Windows operating system equipped with CD ROM drive and Ethernet network card C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 13 64 SatService Gesellschaft f r Kommunikationssysteme mbH e ACAT5 crossover network cable or an Ethernet hub and standard network cables to connect the ACU and the computer e The CD ROM shipping with the sat nms ACU19 Setting the ACU s IP parameters now is easily done within a few minutes 1 First install a network cable between the ACU and your computer If you have a crossover cable available this is very easy simply put the cable into the network connectors of computer and ACU Without a crossover cable you need to connect both the computer and the ACU to the same network hub using two standard network cables It is essential that the computer and the ACU are connected to the same network segment the configuration program is not able to find the ACU through routers or network switches 2 Now power on your computer and connect the ACU19 to the Mains supply J12 3 Insert the CD ROM into the computer s drive and inspect it s contents through the My Computer icon on your desktop Double click to the ChipTool exe program in the ChipToo directory 4 When the ChipTool program is running the program shows a list containing at least one entry describing the actual network pa
79. r DC motor drivers integrated standard motor driver power supply is 24V 6 5A continuous higher values available on demand Frontpanel 2x40 character Display and keyboard operation M amp C Interface Specification Ethernet interface for M amp C and user interface 10 Base T Via http GET requests Electrical and Mechanical Specification Environmental Conditions Mains supply voltage 90 260VAC 47 63HZ or 130 320VDC 1A Temperature range Humidity 5 to 40 C up to 90 no condensation 1HU 19 inch rack mount case 483x42 5x403mm length x width x depth including handles Weight approx 5 4kg C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 64 64
80. rameters each identified by a parameter name To set a certain parameter to a new value a message name value has to be sent to the ACU The ACU interprets this command checks the range of value sets the internal parameter and then answers name value The value in the reply is the value actually recognized by the ACU For instance if the requested value was out of range the replied and internally used value is limited to the applicable minimum or maximum To read a parameter from the ACU instead of a new parameter value a question mark is sent name The ACU replies the actual value in a complete message name value A complete list of the parameter the ACU knows is shown later in this document in chapter Parameter list Below some common rules applying to the remote control message syntax are summarized e Parameter names always are of lower case letters most of them are four characters long e Non numeric parameter values always are written in upper case e Numeric floating point values may be specified with an arbitrary precision however the device will reply only a fixed number of places The ACU recognizes a decimal point numbers must not contain any commas e There must not be any whitespace in front or after the in a message e If the command query is not of the form name value or name the ACU replies the message SYNTAX e If the message syntax is OK but contains an unknown parameter name is used
81. rameters of the sat nms ACU19 E CHIPTOOL uf x File Flash CHIP Tools Info Scan for IPC CHIPs at the network fr Name DACP ome senos Tras Jo rai 004DE3 ACU No 192 168 288 255 255 255 0 192 168 2254 SC13 003056804DE3 2 0 ETH DOSFI9E IO_FEP No 192 168 2 70 255 255 255 0 192 168 2254 SC13 OO3056805F9E 2 0 ETH 006902 BCNRX No 192 168 265 255 255 255 0 192 168 2254 SC13 003056806902 20 ETH 012490 BCNRX No 192168272 255 255 255 0 192 168 2 254 Collect Mode 7 Help Ss Cont Halted Sorted by Snr Open popup menu with right mouseclick at table rows 5 The serial number of the core module shown in the first column of the list If the list stays empty the ACU is not connected properly If there are more entries in the list the configuration program has found other devices in this network segment which use the same technology 6 Now open with a right click the sub menu IP configuration to open the IP configuration window of the program In this form the ACU s MAC address is shown on top below you find the fields to configure the new IP address and network mask If the ACU later shall be operated through a router enter the address of the router on the gateway field otherwise leave this field blank Be sure that the DHCP mark is unchecked the other values have to be set as shown on the picture Finally click to the Yes button to set the new parameters at the ACU C 2013 SatService GmbH www satnms com ACU 19 UM 13
82. re you start please first read the Safety Instructions chapter It contains some important recommendations to prevent damage from the ACU Then we strongly recommend to do a first setup of the ACU on a lab desk before installing it at it s final location This is mainly for the following reason To setup the ACU s IP parameters the PC used for configuring and the ACU must either be connected to the same Ethernet hub or must be connected directly with a crossover cable The initialization program does not work through routers or intelligent network switches Hence the typical sequence of tasks when putting an sat nms ACU19 into operation is as follows Read the chapter 2 Safety Instructions Set the ACU s 4 3 1 IP address 4 1 Mechanically mount the ACU19 4 2 Connect the ACU to the antenna position encoders limit switches and motor drivers Finally connect the mains power supply and the Ethernet network Start up the system and set the parameters as described below 6 As last step connect the motors and start them up as described below PWNHM al 4 3 1 Setting the IP Address Before you can operate the sat nms ACU19 you need to set the ACU s IP address There is a special configuration program on the documentation CD shipping with the ACU for this purpose We recommend to configure the ACU s TCP IP settings before you install the sat nms ACU19 at it s final place To configure the ACU the following equipment is re
83. requency received by the antenna MHz not the IF frequency seen by the receiver is used by the ACU to calculate the antenna s beamwidth and an approximated beam pattern With the sat nms LBRX beacon receiver the ACU automatically reads the frequency from the receiver Tracking cycle time The cycle time specifies how often the ACU shall perform a step track cycle The value is to be entered in seconds In fact the parameter does not specify a cycle time but the sleep time between two tracking cycles This means the true cycle time is the time the ACU needs to perform one step track cycle plus the time entered here 300 seconds 5 minutes is a good starting value for this parameter Inclined orbit satellites probably will require a shorter cycle time very stable satellites can be perfectly tracked with one step track cycle every 15 minutes 900 seconds Tracking step size The tracking step size is a very important parameter for the performance of the tracking It defines the size of every depointing step the ACU makes in order to find out where the optimal antenna pointing is Setting too high values will cause significant signal degradations during the step track cycle because the antenna moves a too large amount away from the satellite Setting the value too small will let the beacon level jitter mask the level differences caused by the test steps the antenna will not track the satellite properly The step size is specified as a per
84. ric parameters If STEP MOVE is selected in the menu the following numeric keys have a new function Move the polarization counterclockwise Move the polarization clockwise Move the elevation down C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 34 64 SatService Gesellschaft f r Kommunikationssysteme mbH 2 Move the elevation up 4 Move the azimuth east 6 Move the azimuth east For all directions view from behind antenna If one or all motors are moving they can stop with the following key 0 Stop every motor 6 1 Display mode The display mode shows the actual reading and some additional information in the display This is the default mode the ACU enters it automatically after power on Depending on the selected tracking mode the default display looks like this ASTRA 19 2E 175 224A 38 756 12 41P OFF 76 34B ASTRA 19 2E 175 224A 38 756 12 41P ADAP S1 3h 12753 She 76 348 The upper display line shows the actual target name and the three axes angles The lower line shows the selected tracking mode depending on tracking mode the size of the tracking memory and the model data or nothing and the beacon level While the ACU is not in a regular state the display shows a message The ordinary contents of the display and the message are shown alternately the message blinks on the display The following messages may be displayed at the corresponding position in the di
85. rvice The file ACUODM MIB contains all necessary information Parameter Description Name SNMP Sets the SNMP community string expected for read access The default is public read community SNMP Sets the SNMP community string expected for write access The default is public write C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 30 64 SatService Gesellschaft f r Kommunikationssysteme mbH community SNMP trap Sets the SNMP community string sent with traps The default is public community SNMP This parameter decides if the SNMP traps are enabled or disabled traps The ACU replies to MIB II sysName requests with the text entered at this place The ACU replies to MIB II sysLocation requests with the text entered at this place The ACU replies to MIB II sysContact requests with the text entered at this place click here to download the MIB file SNMP trap Enter up to 4 trap destination IP addresses dotted quad notation to make the ACU sending IP 1 4 traps by UDP to these hosts Setting the parameter to 0 0 0 0 disables the trap generation Access Control User Here you can define the password for the user login Default password is user When you password are logged in as user you can command the antenna pointing set the tracking parameters if applicable and store recall targets You can t modify the setup parameters or issue low level comman
86. sat nms ACU19 Antenna Controller User Manual Version 4 3 2012 11 08 Copyright SatService Gesellschaft f r Kommunikatiosnsysteme mbH Hardstrasse 9 D 78256 Steisslingen satnms support satservicegmbh de www satnms com www satservciegmbh de Tel 49 7738 97003 Fax 49 7738 97005 SatService Gesellschaft f r Kommunikationssysteme mbH Table Of Contents Table Of Conte ii nl IR Eu EL Ei 1 LIO UCLM ti En a AE a a Se a ras 4 2 Safety Instr ctions 4 2a inetaeksahkesielisthslgstnnkuhlesieiiecdhulgseimpsisstbesssisagsss 6 3 The satenms ACUDE ReimikHiHERleii RER III Ear ie 6 3 1 Frontpanel Display ta A ta dt La 7 3 2 Frontpanel Keyboard gepaart Ban 7 3 3 Motor and Limit Switch interfaces oococcccncccnonononnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnonnnnnonnnnnonononeninenos 7 3 4 Analog beacon level IMput 2 2 2 2 22 gt 8 22 2 2 22822822 22 EIER iia 7 3 3 Angle encoder mtertaces iii A ana ini 8 3 6 Compass and inclinometer interfaces oocococononononononononononononononononononononononononononononononononenenenenenenes 8 3 7 Remote Interfaces un ee Beil ELEIER SRH ln ie une uke lates ooh Lol aed 8 RS NN 8 4Installation 422 ee A da 8 4 1 Mechanical installation 2 ser eek id 9 4 2 Interfaces to the Antenna Pin descriptions 00oooococoononononononnnonononononononono nono nono nono no nono nono nono nono nn nn 9 4 21 Connector Layout n r er I EN ee yet Tee tana hee 9 4 22
87. set to the device address NONE it uses a simple line protocol instead of the framed protocol described above Messages sent to the ACU have to be terminated with a carriage return character ASCII 13 the ACU terminates replies with a CR LF pair ASCIT 13 10 There is no echo for characters entered hence this protocol easily may be used for computer based remote control This setting is also used for allowing communication to an optional frontpanel display and keyboard if implemented If TERM is selected the serial interface is used to allow communication between the ACU and a sat nms Handheld This function is not available at ACU RMU and ACU19 Version 7 4 Parameter list The table below shows the complete list of M amp C parameters the ACU knows in alphabetical order For each parameter the valid range and a short description is given description Antenna abs altitude Amplitude 360 000 360 000 AZ Calibration offset Calculate offset from Az value 180 000 180 000 ABCDEFGNONE 0 000 2 000 NORMAL INVERTED AZ Sense invert 0 000 90 000 180 000 180 000 amax 180 000 360 000 R amdt r o character string C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 40 64 amin SatService Gesellschaft f r Kommunikationssysteme mbH 0 000 180 000 SMALL MEDIUM LARGE DUAL START DIR START NONE gt AZ limit AZ
88. sistant model Specially inclined orbit satellites which are located close to the longitude of the antenna s geodetic location may require this limitation for the azimuth axis With such a satellite the elevation may move several degrees while the azimuth shows almost no motion Level threshold If the beacon level falls below this threshold value the ACU does not perform a step track cycle If the level falls below the threshold during the steptrack cycle the cycle gets aborted If the ADAPTIVE tracking is enabled and there is enough data in the tracking memory the ACU computes a mathematical model from the stored data and predicts the antenna pointing position from the extrapolation of the model If the tracking mode is set to STEP the ACU leaves the antenna where it is if the beacon level drops below the limit Adjusting the threshold level that adaptive tracking is switched as expected must be done carefully and may require some iterations specially if the beacon is received with a low C N A good starting value for the threshold is 10 dB below the nominal receive level or 2 dB above the noise floor the beacon receiver sees with a depointed antenna whatever value is higher To turn off the monitoring of the beacon level this in fact inhibits the adaptive tracking simply set the threshold the a very low value e g 99 dBm Peak jitter threshold Tf the jitter value of at least one axis exceeds this threshold the ACU raises an mo
89. splay At the corresponding angle position FAULT General ACU Fault TIMEOUT Motor moves but the position encoder does not react HI LIMIT High limit switch is activated Low limit switch is activated STOPPED Motor stopped over Web interface or with the STOP Button on front panel BEAC FLT If the ACU reads the beacon level via TCP IP from sat nms LBRX and the beacon receiver does not respond LOW Low beacon signal BEAC If more than one of the above conditions occurs only that one with the highest precedence is shown This means for example that the HI LIMIT state precedes over the LO LIMIT state 6 2 The main menu The menu mode lets you view and change some ACU settings From the display mode you enter the menu by pressing the key ED To leave the menu repeatedly press the key Guntil the display screen appears C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 35 64 SatService Gesellschaft f r Kommunikationssysteme mbH again If there are no keystrokes for 1 minute the ACU automatically leaves the menu and returns to display mode The menu structure is shown below MENU SELECT TARGET STEP MOVE SET AZIMUTH SET ELEVATION SET POLARIZATION SET TRACKING MODE To navigate in the menu use 2 CD To select a menu press ED Pressing GE once returns to the main menu level pressing it twice returns to display mode 6 3 Select targets In the SELECT TARGET menu
90. such a case Finally the LARGE model adds a linear movement to the components of the MEDIUM model This is required to track significantly inclined satellites over a period of several days Such satelites tend to drift in their position the linear movement component can compensate this effect for a couple of days The LARGE model is the most demanding one concerning the step track data it is based on Model selection The ACU normally by itself selects the adaptive tracking model for each axis individually The decision which model will be used in case of a beacon drop out is made based on the amount and quality of the data in the tracking memory The quality of the recorded data mainly depends on the amplitude of the antenna movement If the satellite moves only a small amount in 24 hours the uncertainty of the step track peaks is quite high compared to this amplitude The ACU compares the movement amplitude to the antenna s half 3dB beam width to evaluate this measure The ACU presents this figure as a percentage value C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 58 64 SatService Gesellschaft f r Kommunikationssysteme mbH SMALL MEDIUM amplitude 6 12 18 24 30 36 42 45 hours memory depth The ACU selects the adaptive tracking model following a scheme as illustrated in the diagram above Below 6 hours data in the tracking memory there is no adaptive tracking possible at all With at least 6 hours of data
91. systeme mbH J2 1 EL Low lower limit elevation IN 1 2 GND EXT 3 EL High upper limit elevation IN 4 GND EXT pin signal description type J3 1 PL Low polarisation left limit view from behind antenna IN 1 2 GND EXT 3 PL High polarisation right limit view from behind antenna IN 4 GND EXT J1 2 J2 2 J3 2 Motors Connector Type Phoenix combicon MSTB 2 5 3 ST 5 08 DC motor driver output The motor interface is designed for up to 15A 24V Use shielded cable only to connect the motors Connect shield to PE Pin Take care that the shield is NOT connected on the motor end of the cable pin signal description type Motor AZ Azimuth Motor IN PE Motor AZ Azimuth Motor IN pin signal description type Motor EL Elevation Motor PE Motor EL Elevation Motor pin signal description type Motor PL Polarisation Motor PE Motor PL Polarisation Motor J4 Analog beacon level input Connector Type SMA male The ACU19 preferably is used together with the sat nms LBRX beacon receiver With the sat nms LBRX the ACU talks though UDP or TCP over IP no additional cabling is required in this case At J4 the ACU19 provides an analog interface to third party beacon receivers pin signal description type center level in beacon level signal 0 10V DC IN outside GND _ signal grou
92. tService Gesellschaft f r Kommunikationssysteme mbH 1 Introduction The sat nms Antenna Control Unit is an antenna controller positioner with optional satellite tracking support It may be operated as a standalone unit or in conjunction of the sat nms ACU IDU a PC based indoor unit which offers extended tracking capabilities and a full featured visualization interface The sat nms ACU is available as e sat nms ACU ODM only the core module integrated in a compact case prepared for mounting on a 35mm DIN rail e sat nms ACU ODU complete antenna controller system for AC or DC Motors integrated in an outdoor cabinet that could be mounted directly to the antenna By mounting a sat nms LBRX beacon receiver into this cabinet you have a complete antenna tracking system in a compact cabinet directly at your antenna e sat nms ACU RMU complete antenna controller system for AC Motors integrated in a 6RU 19inch rack mount case for indoor use e sat nms ACU19 complete antenna controller system for DC Motors integrated in a 1RU 19inch rack mount case for indoor use For detailed description please refer to the sat nms documentation CD or www satnms com doc Main benefits of the sat nms ACU are e The ACU outdoor unit is able to act as a standalone antenna control and tracking system without an indoor unit required e The ACU provides an Ethernet interface using the TCP IP and HTTP Internet protocols It can be controlled using any PC providing
93. tective earth wire Any interruption of the protective wire inside or outside the sat nms ACU is likely to make the unit dangerous Intentional interruption is prohibited The unit described in this manual is designed to be used by properly trained personnel only Adjustment maintenance and repair of the exposed equipment shall be carried out only by qualified personnel who are aware of hazards involved Refer servicing to qualified personnel To prevent electrical shock do not remove covers For the correct and safe use of the instrument it is essential that both operating and servicing personnel follow generally accepted safety procedures in addition to the safety precautions specified in this manual Whenever it is likely that safety protection is impaired the unit must be made in operative and secured against unintended operation The appropriate servicing authority must be informed For example safety is likely to be impaired if the unit fails to perform the intended measurements or shows visible damage Ensure that the cabinet is proper connected to the protective earth conductor The circuit breaker that fuses the mains for the sat nms ACU has to switch off all phases AND the neutral wire as well WARNINGS e The outside of the equipment may be cleaned using a lightly dampened cloth Do not use any cleaning liquids containing alcohol methylated spirit or ammonia etc Follow standard Electrostatic Discharge ESD procedures
94. ted from the currently selected model The figure is also expressed as a percentage of the antenna s beamwidth low values indicate that the model ideally describes the antenna s path High values indicate that s something wrong The step track results may be to noisy at low amplitudes or the model does not fit at all This may be the case if a satellite gets repositioned in the orbit A typical threshold value is 20 this will detect very early that a model does not fit to describe the satellite s motion If this value causes false alarms too often you may want to raise the threshold to 50 Setting it to 0 switches the threshold monitoring completely off AZ Maximum model type These settings let you limit the adaptive model to a simpler one the ACU EL Maximum model type would choose by itself The maximum model type can be set individually for each axis Normally you will set both axes to LARGE which leaves the model selection fully to the ACU s internal selection algorithms In cases where the ACU seems to be too optimistic about the quality of the step track results the maximum model on one or both axes may be limited to a more simple and more noise resistant model Specially inclined orbit satellites which are located close to the longitude of the antenna s geodetic location may require this limitation for the azimuth axis With such a satellite the elevation may move several degrees while the azimuth shows almost no motion
95. the antenna to the stored pointing The ACU displays a confirmation dialog before it actually recalls the target memory Only if you click to Submit in this dialog the antenna moves to the stored location Save For each memory location the table shows a floppy disk icon in the Save column Clicking to this icon saves the actual pointing and tracking parameters if applicable to the selected memory location Again there is a confirmation dialog page before the data actually is saved Delete Analogous to the Save icon the table shows an eraser icon in the Delete column The icons only are shown for the memory locations which are in use Clicking to the eraser icon clears the selected memory location after a confirmation inquiry Numeric The table contains an additional row at the bottom labeled Numeric orbit position Clicking to orbit the blue arrow icon in this row opens a dialog where you are requested to enter the orbit position position of a satellite you want the antenna to point to After you pressed Submit in this dialog the ACU computes the antenna pointing for the orbit position you entered and immediately moves the antenna to the calculated position To make this function work satisfactory it is necessary to have the geodetic location of the antenna entered at the Setup page with a sufficient accuracy The first target location labeled adaptive tracking memory is reserved for special purposes
96. thod the ACU actually uses Possible selection are OFF No tracking is performed STEP Step track mode In regular intervals the antenna performs small search steps to optimize the pointing Chapter 8 3 0 Step Track gives more information about this mode ADAPTIVE The adaptive tracking mode works the same way as step track but it additionally is capable to predict the satellite s position when the beacon reception fails It computes mathematical models of the satellites motion from the step track results recorded over a certain time Details about this tracking mode are given in chapter 8 4 0 Adaptive Tracking PROGRAM The program tracking mode is different from the modes above The ACU moves the antenna along a path which is described in a data file No beacon reception is required for this You have to create such a data file and copy it with FTP to the ACU before you can use this mode SatService GmbH provides a PC software which lets you easily create data files for program track from commonly used ephemeris data sets for geostationary satellites Chapter 8 5 0 Program Tracking describes this tracking mode more detailed CLEAR MEMORY Clicking to this mark clear the tracking memory You should do this when you start to track a new satellite Clearing the tracking memory about half an hour after tracking started significantly improves the quality of the first adaptive tracking model which will be evaluated after 6 hours o
97. tical usage there have to be used varying models depending on the amount and quality of the recorded steptrack data Models The ACU uses three different mathematical models to describe the movement of the antenna while it tracks the satellite All models are based on sinusoidal functions with a cycle time on an sidereal day The models called SMALL MEDIUM and LARGE differ in their complexity C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 57 64 SatService Gesellschaft f r Kommunikationssysteme mbH s MEDIUM al The SMALL model the simplest one emulates the true antenna movement with a plain sine function There are only three parameters with this model the nominal antenna pointing and the amplitude phase values of the superposed sine This model is very stable gives reliable results even with only a few measured step track peaks Unfortunately the SMALL model does not fit optimally for all satellites The MEDIUM model superposes a second sine wave with the double frequency two cycles for one sidereal day The model matches very good for almost all stationary satellites It however requires more and also more precisely measured data points to give reliable results The MEDIUM model is fully compatible to the SMALL one this means that also satellites for which the antenna must follow a plain sine function may be tracked with the MEDIUM model The amplitude of the double frequency sine simply is near zero in
98. to the measured points C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 52 64 SatService Gesellschaft f r Kommunikationssysteme mbH pairs of position beacon level values recorded during the step track cycle the peak position p sy evaluated by a least squares calculation antenna pattern approximated by a parabola This method minimizes the impact of noise and measurement errors to the evaluated peak position The benefit is that the size of depointing steps can be reduced to a very small value A tracking cycle consists of 2 4 tests steps With each step the antenna is moved a certain angle increment the beacon level is measured before and after the movement The angle increment is an adjustable value expressed as a percentage of the antenna s 3dB beamwidth A typical value is 15 of the half beamwidth START Do one step in direction A WORSE Do another step in direction A WORSE DONE Do a last step in direction A DONE Do two steps in direction B WORSE DONE Do another step in direction B WORSE DONE Do a last step in direction B DONE The diagram above shows the sequence of steps the tracking algorithm performs in one cycle on one axis It starts with a depointing step in one direction A If this step lets the signal level decrease the antenna makes a double step in the opposite direction It the first step leads to a better receive level the
99. tor at all Low speed threshold The ACU controls a motor at two speeds If the actual position is far away from the target value the ACU commands the motor to use the fast speed Once the antenna comes close to the target value the ACU slows down the motor The low speed threshold sets the angle deviation which lets the ACU use the fast motor speed The ACU performs the motor control as a closed loop if the angle reading and the target value differ the motor is switched on to compensate the difference If the difference is less than the hysteresis value the ACU leaves the motor switched off This prevents the antenna from oscillating around the target value The ACU monitors the position readings while the motor is running If there is no change in the position readings for some time the ACU assumes to motor to be blocked and switches it off This motor timeout fault must be reset by the operator to release it A timeout value 0 disables the timeout The minimum target value accepted at the user interface and via remote control This software limit prevents the ACU from running the antenna to the limit position under normal conditions The maximum target value accepted at the user interface and via remote control This software limit prevents the ACU from running the antenna to the limit position under normal conditions Beacon Receiver Parameter Name Description Beacon Selects the sourc
100. tracking algorithm adds one or two steps in the same direction For a reliable tracking operation the step size have to be big enought to rech the maximum within the 3dB bandwith within in the entered cycle time This meas for an inclient satellite you need a shorter cycle time than for a geostationary satellite 8 3 2 ACU and Beacon Receiver To perform a step track the ACU requires the actually measured beacon level as a rate of the received C 2013 SatService GmbH www satnms com ACU 19 UM 1301 Page 53 64 SatService Gesellschaft f r Kommunikationssysteme mbH signal quality and therefore the closeness of the antenna pointing to the ideal value The sat nms ACU is capable to be operated both with the sat nms LBRX beacon receiver and with third party beacon receiver products With a third party beacon receiver the ACU reads the beacon level from an analog voltage input The beacon receiver therefore must provide a dB linear output voltage preferably in the range 0 10V If the sat nms beacon receiver is used then the beacon level is sent from the beacon receiver to the ACU via UDP packets on the LAN 3rd party beacon receiver beacon level voltage sat nms beacon receiver beacon level via UDP packets sat nims ACU ODM sat ninms ACU ODM indoor control indoor control computer computer If asat nms LBRX beacon receiver is used with the ACU it additionally gets connected to the ACU through an Ether
101. ware calculates the pointing angles from the sensor readings it includes some calibration parameters configurable at the Setup page The steps of calculating a pointing angle are as follows Get the raw value Extend left shift the value to 32 bits Reverse the sign if this option is set in the setup Apply add the pre scale offset Convert to degrees If the calibration scale is nonzero multiply by the calibration scale Add the post scale calibration offset For the azimuth axis add the antenna course too 0 XI NU hh YN Re The angle calculated this way may exceed a full circle of 360 if the scaling ensures that there is no overflow of the encoder reading itself The value displayed as raw reading at the test page is the result of step 2 8 2 Pointing Motor Control The sat nms ACU performs the pointing motor control as a closed control loop independently for each axis If the measured position value differs from the target value the motor is activated to compensate this difference It makes no difference if a new target value has been commanded or if the antenna has moved a little bit due to a squall Hysteresis To avoid that the motor is switched forth and back all the time the ACU tolerates small differences between measured and target value within a hysteresis value This hysteresis is individually configurable for each axis at the Setup page To ensure that the motor stands still when the target p

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