USER GUIDE FOR
Contents
1. 1 2 3 4 5 6 videoTXT man rev 8 3 15 of 33 Choose which page you wish to set the text size for then select the size required from the options below If you are using an NTSC signal the appropriate sizes will be displayed for this signal Text size settings PAL Small text 69 x 24 Medium text 34 x 19 Large text 32 7 Default text 52 x 19 For reference the four sizes available are PAL NISC Small font 69 columns 24rows 20rows Default font 52 columns 19rows 16 rows Medium font 34 columns 19 rows 16 rows Large font 32 columns 7 rows 6 rows NOTE Changing the text size will also affect the position of any offset that has been set For this reason if the text size is changed the following message will be displayed and the offset position is reset to 1 1 so that the user can re choose the optimum position See section 6 below Text size settings 1 Small text 59 x 2d 2 tedium text 5d x 19 Large text Sex 4 Default text 52 x 19 NOTE The serial text offset for the associated serial port has been reset to 1 1 Press any key to continue 4 Text shade settings Again separate shades can be selected for the scratch and each of the four stored pages shade settings 7 shade for serial port 1 shade For scratch page port 2 shade For stored page 1 shade For stored page 2 shade for stored page 3 shade For stored page 4 Ge 1 2 32. Master firmware 5 10 23rd February 2009 Slave firmware 5 10 23rd February 2009 videoTXT man rev 8 3 3 of 33 2 Rear connections SERIAL 2 SERIAL 3 External data feeds from a navigation or inspection package e g QPS Starfix Coabis Pisys etc can be connected to Serial 1 Serial 2 or Serial 3 if this option has been purchased A typical recommended set up would be Serial 1 Navigation data Serial 2 Inspection component ident Serial 3 CP value The serial inputs are 100 independent each functions as if it were a transparent screen sized text area laid on top of each video channel so a clear screen command sent on Serial 2 will not delete any text being fed from Serial 1 see diagram below NOTE The keyboard and internal clock output to the same overlay layer as Serial 2 therefore if the keyboard and or internal clock are to be used avoid any external inputs to Serial 2 If the Serial 3 option has been purchased Serial 2 and 3 inputs share the same layer Serial 2 uses the top half of the screen Serial 3 the bottom half videoTXT man rev 8 3 4 of 33 When making a cable to link between videoTXT and a PC this should be a cross over null modem configured as PC videoT XT 2 3 3 2 5 5 Data should be sent to the videoTXT as 9600 Baud 8 bit No parity 1 stop bit videoTXT man rev 8 3 5 of 33 3 Serial Command Index for input via the serial port The videoTXT com
3. both the date and the time but depending on the location of the vessel may not be available NOTE Before synchronising the time with the GPS signal the GPS data input must be enabled Therefore if the following message appears return to Option 7 of the Control Menu videoTXT man rev 8 3 13 of 33 Sync time with GPS GPGGA ERROR This function can only be used when serial port 2 has been configured to accept input from a GPS unit via the menu Press any key to continue Once correctly selected either of the following screens appears showing that synchronisation with GPS is in progress sync time with GPS GPGGA Trying to sync time with GPS Press Escape to cancel NOTE The date cannot be obtained from the GPS unit using GPGGA information This function will try to ensure that the correct date is maintained when the time in your time zone crosses midnight but you should always check and if necessary adjust the date nanually afterwards If possible you should use GPRMC information to synchronise the overlay as this allows the date to be set by the GPS unit itself Sync time with GPS GPRMC Trying to sync time with GPS Press Escape to cancel Once synchronisation is in place a screen similar to the ones below will appear Sync time with GPS GPGGA 22701708 16 54 33 Press any key to continue Sync time with GPS GPRMC 22 01 08 16 55 02 Press any key to continue v
4. d 5 6 E E Examples of the 9 text shades available are shown overleaf videoTXT man rev 8 3 16 of 33 Text shade settings Norme wm te EEE jack t ext Bold white text ok an White on black text Black on white TI m Quot Dame Mh ua ext text White on transparent texti Note the example shown is on a striped background to best display the range of shades in this printed manual When the number corresponding to each text shade is typed the relevant font shade is immediately shown on screen Some examples of these fonts shown over a video signal are as follows 1 Normal wie text 4 Bold CLES X E eos P qu P By RA 2 1 03 15 c po uis MI ed d m 1 a i F tl T A UP rel nat Uc f AM PA i i D 6 Black on white background 1 p jo 114 T 23 06 05 Sa a cd RU F ra E i TURA ARET i ce b i 6 02 07 23 El E videoTXT man rev 8 3 17 of 33 tlh CN 7 ee white text mu 8 Outlined black text ay LNG 5 Channel title settings This option enables brief titles to be set up which will be displayed on each separate screen NOTE All 4 titles will only be displayed when a quad channel overlay is in use With a single channel overlay only the first title text one will be displayed with a dual channel ove
5. 2 and 3 Send 7 followed by 6 channel 2 and 4 Send 7 followed by 10 channel 3 and 4 Send 7 followed by 12 O O O To send to three channels O channels 1 2 and 3 Send 7 followed by 7 O channels 1 2 and 4 Send 7 followed by 11 O channels 1 3 and 4 Send 7 followed by 13 O channels 2 3 and 4 Send 7 followed by 14 To disable all video channels Send 7 followed by f you have a triple channel overlay the on off state of video channel 4 will be ignored f you have a dual channel overlay the on off state of video channels and 4 will be ignored lf you have a single channel overlay the on off state of video channels 2 and 4 will be ignored videoTXT man rev 8 3 6 of 33 Compatibility with Oceantools Systems Function Subfunction Hex Code Dec Code Key Code P Carriage return ma D 13 M Time 2 bytes must be sent e g 00 followed by parameter Date 2 bytes must be sent e g 01 followed by parameter Font 2 bytes must be sent e g 09 followed by parameter Lo 0 0 J SettimetoTopCentre 01 1 J Set time to Bottom Centre 02 42 Settimeto TopLeft 03 3 Set ime fo Top Right o pet tine we Potion tot 5 5 _ Set time to Bottom Right Set ime to Of ee SetdatetoTopCentre 01 1 J SetdatetoTopLet 03 3 J SetdatetoTopRight 04 4 NN OD Set date
6. NOTE In scratch mode and in this mode only the Insert function on the keyboard has had to be disabled Stored text Four different pages of text can be stored for future use These are activated by the use of the F5 F6 F7 and F8 shortcut keys To set up your stored text 1 select the text size required using the Control Menu option 3 2 select the required shortcut key F5 or F6 or F7 or F8 videoTXT man rev 8 3 8 of 33 3 type in the text required The text is recorded automatically and is displayed every time the same shortcut key is pressed Even if the videoTXT is powered off the text is stored It is possible to have different text shades and sizes on each page These are chosen through the menu system Select F4 to return to scratch mode and then F1 to enter the menu system see below for more details NOTE changing the text size on a stored page also deletes the text on that page Changing the text shade can be carried out at any time before or after the text has been created Channel titles A short title can be set up for display on each video channel in use For example when a triple channel videoTXT is in use the user could display Diver 1 on the first video channel Diver 2 on the second video channel and Diver 3 on the third video channel Channel titles are also retained if the videoTXT is powered off NOTE On a single channel overlay only the first title is displayed To set up channel titles
7. OV line and are protected to around 50v The following sections explain the menu options concluding with a worked example for reference To access the relevant menu from the menu screen press F1 while in scratch mode select option 8 Analogue interface settings Analogue interface settings 1 Analogue display settings 2 Analogue input calibration 3 Analogue input configuration 8 1 Analogue display settings This screen allows you to choose which of the 4 channels should be displayed on screen and to set the maximum voltage values for each channels Analogue displa settings Channels to display CP IN Quis aux 1 5Y AUX 2 off AUX 3 off Select which analogue channels are to be displaued and which are to be ignored with the following keys adjusts setting of the CP channel adjusts setting of the AUX 1 channel adjusts setting of the AUX 2 channel adjusts setting of the AUX 3 channel Return saves settings Escape discard changes For each channel select the maximum voltage value that might be applied to the analogue input to give you a full scale reading from the analogue to digital converter There are 3 different input ranges 0 to 2 5V 0 to 5V and 0 to 10V videoTXT man rev 8 3 23 of 33 The channels are controlled by the keys described on the screen so key C switches on the CP channel whilst key 1 switches on Channel 1 Furthermore the same key toggles through each of the voltage set
8. USER GUIDE FOR NETmc MARINE videoTXT MARINE Hev 8 3 Firmware version 5 1 February 2009 videoTXT man rev 8 3 Contents ghige ce Ui c 6 MER ee ee ee Em 3 Serial Command Index for input via the serial port 6 4 Keyboard Command nennen nennen nnns nnns narrans 8 VIS GL m TT S 11 11 RET 12 S TO XESIZO Se ING 15 4 Text shade 16 su riue Seting T 18 6 Display offset settings neuen 20 7 GPS data input settings 22 8 Analogue interface 5 23 St osa DCE 28 6 Overlay MANAGE vea aenea oa Vaca ea Guo e ux cusa ue Ya ola pos iUis ua Fa ua VR eiei 29 7s TOUDE SMOOUING 30 8 How to contact NETmc Marine 31 Appendix 1 Technical SOSCHl CANONS 32 NETmc Marine Ltd Turfhill New Deer Turriff Aberdeenshire AB53 6TL Scotland TEL 44 1771 644001 FAX 44 1771 644005 EMAIL support netmcmarine co uk videoTXT man rev 8 3 2 of 33 1 Introducti
9. e generated from the PC which may make it easier to synchronise clocks It also allows the user to type set his page of text before actually seeing it displayed on the video screen which can be very useful if the video is being recorded live Overlay manager also allows multiple screens of data to be configured and toggled between e g header pages and normal running page Additionally all the pages can be saved to disk so operators can have sequences of custom pages saved on disk for each client saving editing or retyping between jobs 34 Overlay _ ayar MARINE jRovtech Panther 17 Factory acceptance tests Bottom Left F Bottom Right Overlay New Open Save Setup MiniMade NET 8 2 MARINE Client Amerada Hess Ltd Contractor ROvtech Ltd vessel Highland Eagle Component GVI amp CP survey of Umbilical Risers ROV Tiger 102 Video Ref Caddie 3 Date 28 11 05 Recorder NETmc Marine DVRi 51 videoTXT man rev 8 3 29 of 33 T Troubleshooting Symptom Cause Cure Text not stable appearing to move up and down screen Poor video input signal Some element of the video signal must be out of spec e g peak peak voltage DC offset sync pulse etc VCR footage otablility can also be an issue if trying to apply overlay to footage acquired on a VCR Clean up the signal check for bad connections double terminations I
10. e on the converter The biggest number the A D outputs is 4095 When you change input range the scaler setting is automatically changed so that the maximum voltage input of that range equates to an A D output of 4095 e g on 0 5v range 5 volts 4095 If the largest signal you will ever apply is 4 volts you still need to be on the 0 gt 5v range but it would be desirable to adjust the scaling so that 4v equates to 4095 so you get the full range and accuracy available The scaler setting should be adjusted to close to but not exceeding 4094 else an over range warning will show E g after using the scaler settings the A D output may be 4093 adjusting the reference trim downwards will bring it up to 4094 Note If set to 4095 the system cannot distinguish between this and an over range so only go up to 4094 The scaler setting option is not available on the CP channel ADC output This shows the raw value that is being returned by the converter Press the ENTER key to save the settings Then select ESC to return to the analogue menu videoTXT man rev 8 3 25 of 33 8 3 Analogue input configuration Analogue input configuration Channel Prefix Suf Fix Cain Offset 0 0000 Heading Deg 1 X 0 0000 0 0000 1 0000 0 0000 Select the analogue channel which is to be edited by pressing the appropriate selects the CP channel selects the AUX 1 channel selects the AUX 2 channel selects the AUX 3 channel Return save
11. f possible use a time base corrector An isolation transformer may be desirable especially ROVs benefit greatly from an in line isolation transformer videoTXT man rev 8 3 30 of 33 8 How to contact NETmc Marine Support Should any problems occur with your videoTXT that are not addressed by this manual please contact our Support Team Email support netmcmarine co uk Tel 44 1771 644001 Should your call be outside office hours please leave a message on the answering machine which will be forwarded to one of the support engineers Although we cannot guarantee 24 7 availability we endeavour to respond as quickly as possible to any query regardless of when the support call is made videoTXT man rev 8 3 31 of 33 Appendix 1 Technical Specifications Non operating Humidity 5 95 RH non condensing Non operating Altitude 305m 12 200m Linear 20 300Hz 0 75G 0 to peak Random 10 300 Hz 0 004g2 Hz Low frequency 5 20 Hz 0 195 inches double amplitude High frequency 10 300Hz 5 0G 0 to peak Video Input Composite BNC PAL NTSC Operating Vibration Non operating Vibration Storage and Shipping After overnight road freight the unit should be left at room temperature for 5 hours before powering on After air freighting the unit should be left at room temperature for 10 hours before powering on videoTXT man rev 8 3 32 of 33 Note This equipment has been tested and found to co
12. has been changed are shown below Set positioning for port 1 When the display is cleared or the cursor is homed by a control code received on serial port 1 leave the cursor positioned at 1 5 Set positioning for port 1 When the display is cleared or the cursor is homed by a control code received on serial port 1 leave the cursor positioned at 5 1 NOTE If the text size is changed the offset will be returned to the default 1 1 position This is because changing the text size will alter the available number of rows columns which may result in the previously saved offset becoming invalid Text size settings PAL 1 Small text 59 x 2d 2 tedium text 5d x 19 3 Large text 42 x 7 4 Default text 52 x 19 NOTE The serial text offset for the associated serial port has been reset to 1 1 Press any key continue videoTXT man rev 8 3 21 of 33 7 GPS data input settings If you have a GGA compliant GPS signal available it can be input to serial 2 and enabled using this menu to display latitude and longitude on screen NOTE GPS data should be 4800 8 N 1 GPS data input settings Enable GPS GGA display Disable GPS GGA display set display positioning An example of a GPS display is shown below 57 30 6967 2 12 8873 W Set displa Positioning Display GPS GGA data latitude longitude on the ist row of the display counting from the uppermost row the lowermost
13. hots of the pages the user can expect to see 1 Help This option contains some basic operational and setup tips Help pages F2 clears the display if a stored page is active its text will be erased F4 selects the scratch page F5 to F8 select stored page 1 to 4 Insert when on a stored page switches the keyboard between overstrike and insert Ctrl I inserts an empty row into the page Ctrl D deletes the selected row from the page Refer to the user guide for a detailed description of the available facilities Press any key to continue videoTXT man rev 8 3 11 of 33 2 Time Date Settings Use this menu to change the time on the internal clock or to change the position of the time and date on screen It is also possible to select either UK or US date format and synchronise the time with GPS Time and date settings Check current time and date Set current time and date Select date format Select current time zone Sunc time with GPS GPGGR Sunc time with GPS GPRMC Time and date display settings J C C1 B oJ hse Option 1 Check current time setting An example screen is shown here 18701708 16 34 03 Press any key to continue Option 2 Set current time and date Set current time and date 18 01 08 16 34 10 Enter the date followed by the time using the number keys and the following control keys Backspace moves the cursor to the left and deletes the digit at this position Escape disca
14. ideo channel 1 videoTXT man rev 8 3 Enter text for titles Enter title text for channel 1 For channel 3 Diver 3 For channel 2 Diver 2 19 of 33 Option2 Set title positioning Set title positioning at at at at at at Tab Return Escape Display titles the top the bottom the upper left the upper right the lower left the lower right cycles the title position setting saves the new settings to memory discards all changes and returns to the Channel Title settings menu The following screen shows an example of a scratch page with the channel title enabled 6 Display offset settings Diver 1 This option enables the user to position the text being sent to the videoTXT via the serial ports This is useful if you cannot change how your serial string device outputs its data The offset for the scratch page can also be set here is 1 EE E 24 JP E videoTXT man rev 8 3 lay offset offset for sc offset for Set offset for port et offset for g 20 of 33 Set positioning for port 1 When the display is cleared or the cursor is homed by a control code received on serial port 1 leave the cursor positioned at 1 1 Cursor right left adjust the column field Cursor up down adjust the row field Return saves the new settings to memory Escape discards all changes and returns to the Serial text offset menu Examples of this screen where the positioning
15. ideoTXT man rev 8 3 14 of 33 Option 7 Time and date display settings Time and date can be displayed in different positions on the scratch and on each of the four stored pages Settings for Settings Settings For Settings for Settings For Ca amp J MJ scratch page stored page 1 stored page 2 stored page 3 stored page 4 Time and date displa Disp the the the the the the don t d Tab Shift Tab Return Escape 3 Text size settings lay the time top bottom upper left lt upper right lower left lt lower right isplay time settings Display the date at at at 9 at at don the the the the the the top bottom upper left upper right lower left lower right t display date cycles the time position setting cycles the date position setting saves the new settings to memory discards all changes and returns to the Time and date settings menu It is possible to set different text sizes for the scratch page and for each of the four stored pages NOTE Changing the text size on a stored page also deletes the text on that page Therefore it is important to choose the text size first and then set up the page with the required text Text size settings Set size for serial port 1 Set size for scratch page port 2 Set size for stored page 1 Set size for stored page 2 Set size for stored page 3 Set size for stored page 4
16. mand structure follows the established industry standards A summary of the commands follows Compatibility with Taylor Lann C Systems Key Code FGesSceen 16 Cursor Right Cursor Down Carriage return OD _ 18 M If your videoT XT is set for use with more than one channel please note the following The default setting is All channels on Serial commands will apply to all video channels code 7 decimal code 7 is used to determine which video channel s serial input will be sent to This command can be issued on both serial port one and serial port two and acts independently for each i e the serial input can be sent through serial port one to one video channel or a combination of channels and a different serial input can be sent through serial port two to a different video channel or combination of channels For all settings two bytes need to be sent 7 followed by another digit to select which video channel s should apply Any combination of channels can be selected as indicated below by adding the digits for each channel To send to o video channel 1 only Send 7 followed by 1 o video channel 2 only Send 7 followed by 2 o video channel 3 only Send 7 followed by 4 o video channel 4 only Send 7 followed by 8 To send to two channels O channel 1 and 2 Send 7 followed by 3 channel 1 and 3 Send 7 followed by 5 channel 1 and 4 Send 7 followed by 9 channel
17. mply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense End of Document videoTXT man rev 8 3 33 of 33
18. on NETmc Marine s videoTXT is a robust solid state overlay unit capable of overlaying text onto PAL or NTSC video signals The videoTXT will detect which type of signal is present automatically Note that if no signal is detected the videoTXT will default to PAL settings Housed in a 1U rack mount case the videoTXT is capable of placing text on up to 4 separate unsynchronised video signals Data can be input via PS2 keyboard or serial port Up to 1656 characters can be displayed on the screen in 4 selectable font sizes and 9 selectable font shades small font 1656 PAL 1380 NTSC The videoTXT has an internal real time clock RTC which allows time and date to be displayed on the screen without being fed from an external source The firmware can be updated in situ via serial port 2 Please contact NETmc Marine Support for more details Available models Single Video channel unit Dual Video channel unit Triple Video channel unit Quad Video channel unit Options available with all models Analogue interface settings Additional third serial port NOTE The third serial port is active only if this additional option has been purchased Any data input to this third serial port is restricted to the bottom half of the screen Upon powering up the videoTXT the following screen is displayed confirming which model is present single dual triple or quad channel and which firmware version the unit is using Single channel
19. output will become saturated and the over range warning will be displayed Use the reference trim to fine tune the output to be 4095 Hit return to save the settings then open the Analogue Input Configuration menu Use the Gain setting to multiply the 3 6 volts by 100 to give the 360 required A prefix of Heading can be added A suffix of Degrees can be added Use the digits setting to set the number of decimal places 3 2 gives 180 00 Use x y to position the information on the screen Pinout Diagram 9way D type female on rear panel Pin Function CP ve CP ve Aux1 ve Aux1 Ov Aux2 ve Aux2 Ov Aux3 ve Aux3 Ov General Ground videoTXT man rev 8 3 27 of 33 9 Serial port 3 settings Note these settings are available as an extra option on all models port 4 settings Enable serial port 3 Disable serial port 3 When enabled data input to serial port 3 will appear on the bottom half of the screen Serial port 2 will then be limited to the top half of the screen videoTXT man rev 8 3 28 of 33 6 Overlay Manager The videoTXT is shipped with NETmc Marine s Overlay Manager software which can be used to control the overlay remotely from a PC connected to the overlay s serial port The software is also available as a download from our website www netmcmarine co uk This software can be installed on any PC with a serial port Overlay Manager allows the time date to b
20. rds all entries and returns to the Time and date settings menu Option 3 Select date format Select date format 1 Select UK format dd mm uu 2 Select USA Format mm dd yy videoTXT man rev 8 3 12 of 33 Once a format has been selected the user will see a screen similar to the one below Select date Format 1 Select UK Format dd mm uu 2 Select USA Format mm dd yy Selected date format is UK Press Return to accept the changes Press Escape to cancel Option 4 Select current time zone This will be necessary if you wish to synchronise the time with a GPS signal Examples are shown below Select current time zone Time zone is UTC Specify the time zone which will be used when synchronising the overlau s internal clock with the time reported by the GPS unit The control keys are Cursor up down increment decrement the interval to be added to subtracted from UIC to obtain the local time in your zone Return saves the new settings to memory Escape discards all changes and returns to the Time and date settings menu Select current time zone Time zone is UTC Oih 00m Select current time zone Time zone is UTC Oih 45m Option5 Sync time with GPS GPGGA Option6 Sync time with GPS GPRMC Notes on the 2 GPS systems the GGA signal is available almost everywhere but the signal carries only the time and not the date therefore the date may need to be correctly manually The RMC signal carries
21. rlay only texts one and two are displayed with a triple channel overlay texts one two and three are displayed Channel title settings 1 Enter text for titles 2 Set title positioning Option 1 Enter text for titles Simply type in the text required videoTXT man rev 8 3 18 of 33 Enter text for titles Enter title text channel For channel For channel Cursor left amp right Backspace Delete Home End Ctrl Delete Return Escape move cursor within text field backspaces cursor and deletes the underluing character deletes character under cursor moves cursor to start of field moves cursor to end of field deletes all text within field saves text to title memory cancels text entru no change The following screen shows an example where the text for three channels has been entered Enter text for titles Enter title text for channel 1 Diver 1 For channel 2 Diver 2 For channel 3 Diver 3 Cursor left amp right Backspace Delete Home End Ctrl Delete Return Escape move cursor within text Field backspaces cursor and deletes the underluing character deletes character under cursor moves cursor to start of field moves cursor to end of field deletes all text within Field saves text to title memory cancels text entry no change To delete the title on any video channel simply delete the text for the relevant channel on the above menu screen In the example below no title has been set for v
22. row gt Tab cycles the vert alignment setting Cursor up down adjust the vertical offset setting Return saves the new settings to memory Escape discards all changes and returns to the GPS data input settings menu NOTE Should the GPS signal disappear for 4 seconds or more the following warning message will appear NO GPS INPUT videoTXT man rev 8 3 22 of 33 8 Analogue interface settings Note these settings are available as an extra option on all models In most cases data is sent to the overlay via a RS232 data link as a string of ASCII characters but some sensors are not able to generate this type of output Instead they output a voltage which is relative to the value or status of the sensor This voltage changes as the status or conditions change These analogue signals can be interfaced to the VideoTXT by means of the optional 4 channel analogue to digital converter ADC board Each channel is separately configurable for scaling voltage offset and screen position and can be labelled with a descriptor and unit Input 1 referred to as CP has a precision isolation amplifier fitted allowing the measurement of signals with floating ground which is particularly suitable for any application where there is a risk of erroneous voltages e g CP measurements The isolation also gives the circuits a level of protection from over voltage up to 1000v and short circuit Inputs 2 4 share a common reference e g ground or a
23. s the new settings to memory Escape returns to the Analogue interface menu The analogue input configuration screen allows you to set up the parameters as you want to see them on screen The prefix suffix gain offset x y and digits before and after the decimal point can all be adjusted For example to adjust the configuration of the Channel Aux 1 press the 1 key The cursor appears in the Prefix field Any text can be entered here Press Enter and the cursor moves to the Suffix field Again any text can be entered Press Enter again and the cursor enters the field Tab between the multiply and divide options Press Enter to advance to the next field and so on Gain The gain specifies a value in which the value from the A to D converter will be either multiplied or divided by in order to give a more meaningful display For example the output will always be in the range 0 to 4095 However if degrees are being measured the result should be in the range 0 to 360 In this case the gain should be set to 11 375 as shown in the example above Then an output of 4095 will be displayed as 360 Offset The offset will be is added or subtracted to the new value received after the gain adjustment An offset might be used for example if voltage is being measured to display values in the range 2 5 to 2 5 instead of 0 to 5 an offset of 2 5 would be entered X Y This sets the position of the displa
24. t these options Press ESC to return to the settings set by the user Note This option can only be selected for those channels which have already been selected under option 8 1 Analogue Display Settings The input range displayed is that which was selected on the Display Settings page videoTXT man rev 8 3 24 of 33 Analogue input calibration Settings For AUX 1 Input range 5V Reference trim 10 Scaler setting 77 ADC output 6 Tab Cursor left right Cursor up down Backspace Return Escape cucles the input channel adjusts the reference trimming adjusts scaler setting For AUX recalls system default settings saves the new settings to memory discards changes and returns Examples Settings For AUK 1 Input range 5 Reference trim 250 Scaler setting if ADC output Settings For AUK 1 Input range 5 Reference trim PS Scaler setting hE ADC output Reference trim This is used to fine tune the output of the A D converter after setting the Scaler setting However before making any adjustments the reference trim should be set to ZERO order to increase the reading from the system towards 4094 the reference trim needs to be adjusted DOWN If an over range warning appears the reference trim should be adjusted UPWARDS Scaler setting This is used to tune the output of the A D converter so that the maximum analogue voltage you intend to apply corresponds with the maximum scal
25. te Deletes the character underneath the cursor only available when on a stored page and moves the remainder of the row to the left Backspace Deletes the character to the left of the cursor if on a stored page this key moves the remainder of the row to the left Return Begins a new line on the display Cursor keys Move the cursor in the direction of the arrows Page up Moves the cursor to the upper left of the screen Page down Moves the cursor to the lower right of the screen Home Moves the cursor to the start of the current row End Moves the cursor to the end of the current row videoTXT man rev 8 3 10 of 33 5 Menu Structure The user can enter the menu system by pressing F1 whilst in scratch mode Help pages Time and de Text size etin Text shade Channel tit Display offset GPS data TONERS Analogue intere Serial port 3 1 n d 5 5 c 9 odo Roa 44 NOTE The example shows a screen where input signal is connected Ifa signal is connected the menu will be displayed over this signal In each menu type the appropriate number to select that option Press the Escape key to return to normal display Note that the menu options are dependent on the model of videoTXT that has been chosen Menu options 8 Analogue interface settings and 9 Serial port 3 settings will only be shown if these options have been purchased with your videoTXT The menu options are described below with screen s
26. tings For example in a new machine the display settings will appear as shown in the example above Press C once to display the CP channel with 2 5V press C again to select 5V C again to select 10V Similarly press 1 repeatedly to toggle between the voltage options for channel AUX 1 press 2 repeatealy to toggle through the options for channel AUX 2 and so on It is possible to have any combination of the channels selected including none or all of the channels Channels to display CP IH oF FT RUX 1 off Channels to display CP TH 5Y AUX 1 54 AUK 2 inff AUK 3 off ALIX 2 toFf RUE 5 ioff Example with CP and channel 1 selected Example with no channels selected Channels to display Channels to display CP IN orf CP IN off AUX 1 54 AUX 1 54 AUX 2 10V ALA 2 off AUX 3 ioff aux 3 104 Example with channels 1 and 2 selected Example with channels 1 and 3 selected 8 2 Analogue input calibration Note The factory default settings will give sensible outputs and can be left as they are For advance users who wish to fine tune the calibration This sub menu allows the user to set the A D converter so that the full scale output of the A D corresponds to the full scale input voltage applied to the unit This is done by changing the values for each channel so that the ADC uses all 4095 available levels The default settings can be retrieved at any time by pressing the Backspace key Press ENTER to accep
27. to Bottom Right 06 6 Set date to Off 0 0 Lo 9 M Setfottosmal 01 1 Setfonttomedium 02 2 B Serial port 2 only Neither Time Date or Font changes are supported on Serial port 3 videoTXT man rev 8 3 7 of 33 4 Keyboard Command Index The keyboard must be connected to the front of the videoTXT prior to power up The videoTXT is designed to work with any PS2 keyboard A USB keyboard used via a PS2 adapter should also work but this has not been tested Text can be drawn on the screen by typing on the keyboard in the regular manner Caps Lock and Shift keys are supported for capital letters and punctuation characters Select the position on the screen where the text should appear by using the arrow keys Backspace Is used to erase text F keys shortcut keys see summary below ESC takes the user out of the menu system Scratch mode Upon first powering up the unit scratch mode is entered Text will be displayed on the screen as typed into the keyboard This text is lost if any other command is carried out for example entering the menu system or if the videoTXT is switched off The font size and shade and offset settings can be altered using the menu system via F1 see below The default setting upon power up is that this text is displayed on all video channels Text can be disabled from any one or more channels by using shortcut key commands see below
28. use option 5 of the Control menu See below for more details Cursor position The cursor flashes at its current position to facilitate keyboard use This may be on top of time date as in the example below or some text If the keyboard is not used the flashing cursor will disappear after approximately 10 seconds 1709 07 videoTXT man rev 8 3 9 of 33 Summary of shortcut key commands F1 Brings up the Control Menu see below for more details Note This key only functions when in scratch mode F2 Clears the display if on a stored page the page memory will also be cleared F4 Selects scratch page freestyle volatile text F5 Selects stored page 1 F6 Selects stored page 2 F7 Selects stored page 3 F8 Selects stored page 4 Ctrl F5 Clears stored page 1 Note This and the next key commands can be used whichever page the user is currently on Ctrl F6 Clears stored page 2 Ctrl F7 Clears stored page 3 Ctrl F8 Clears stored page 4 Ctrl 1 Enables disables the display of keyboard input on video channel 1 Ctrl 2 Enables disables the display of keyboard input on video channel 2 Ctrl 3 Enables disables the display of keyboard input on video channel 3 Ctrl 4 Enables disables the display of keyboard input on video channel 4 Inserts an empty row at the current cursor position Ctrl D Deletes the row at the current cursor position Insert Toggles between overstrike and insert modes only available when on a stored page Dele
29. y on screen Chamel Prefix Suffix Gain 1 0000 0 0000 ms BUS 1 Heading 41 3750 0 0000 AUR 2 1 0000 0 0000 BUE 3 E 1 0000 LJ e no LJ In the example above display settings for channel AUX 1 are displayed on screen in the position of X 8 Y 9 The text displayed for an output of 4095 would be Heading 360 00 Deg videoTXT man rev 8 3 26 of 33 Channel Prefix CP AUR 1 Heading 0 0000 AUR 2 0 0000 AUR 3 1 0000 0 0000 In the example above display settings for channel AUX 1 and for the CP channel are displayed on screen The CP is shown in the top left corner the AUX 1 channel readings in the position of X28 Y 9 Example A D setup procedure An ROV has a gyro compass system which outputs a voltage between 0 and 3 6 volts which relates to 0 360 degrees of vehicle heading 1 Select which input to use It is a low risk input not requiring the isolation of the CP input so use first available AUX pair 2 Open Analogue Display Settings menu As max voltage is 3 6 the 0 gt 5v range must be used Set the range for AUX1 to 5V Open the Analogue Input Calibration menu Hit backspace to clear any previous setups and take the figures back to defaults oet compass to output its maximum value or simulate using bench supply Adjust the scaler settings so that raw ADC output is as close as possible to but not exceeding 4095 If you over adjust the A D
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