USER GUIDE FOR
Contents
1. Enter title text for channel 1 Cursor left amp right Backspace Delete Home End Ctrl Delete Return Escape for channel 2 For channel 3 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 memoru 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 Cursor left amp right Backspace Delete Home End Ctrl Delete Return Escape for channel 2 Diver 2 for channel 3 Diver 3 move cursor within text Field backspaces cursor and deletes the underlying 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 video channel 1 videoTXT man rev 10 1 January 2013 NETmc Marine Ltd 2012 21 of 40 Enter title text For channel 1 For channel 2 Diver 2 For channel 3 Diver 3 Option2 Set title positioning Set title positioning at at at at at at Tab Return Escape The following screen sho2. 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 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 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 Set 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 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 videoTXT man rev 10 1 January 2013 33 of 40 NETmc Marine Ltd 2012 Pinout Diagram 9way D type female on rear panel Pin videoTXT man rev 10 1 January 2013 NETmc Marine Ltd 2012 Function C
3. 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 Quadruple Video channel unit Options available with all models Analogue interface settings Additional third serial port LAN local area network option 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 quadruple channel and which firmware version the unit is using Quadruple channel Master firmware V6 00 25th September 2009 Slave firmware 6 00 25th September 2009 videoTXT man rev 10 1 January 2013 3 of 40 NETmc Marine Ltd 2012 2 Rear connections External data feeds from a navigation or inspection package e g Eiva 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 custom string Serial 2 Inspection component ident Serial 3 CP value The serial inputs are 10096 independent each functions as if it were a transparent screen sized text area laid on top of each vid
4. 5 b LJ EE E MI IL Text shade settings Normal RAS te 547 Bold white ust slack text White on black text Black on white text Out medi YNYS White on transparent Words 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 white text 4 Bold black 31V videoTXT man rev 10 1 January 2013 19 of 40 NETmc Marine Ltd 2012 5 White on black u 6 Black on 9 White on transparent ATE fo UZ videoTXT man rev 10 1 January 2013 20 of 40 NETmc Marine Ltd 2012 5 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 overlay only texts one and two are displayed with a triple channel overlay texts one two and three are displayed Channel title settings Enter text for titles 1 2 Set title positioning Option 1 Enter text for titles Simply type in the text required Enter text for titles
5. OS 29 RR 35 fa HOUDI SIMO OWING tangents 36 Ga DC 119 37 A ROVOC Ona CENE WANING SUDO 38 Appendix 1 Technical Specifications nennen 39 NETmc Marine Ltd New Deer Turriff Aberdeenshire AB53 6TL Scotland TEL 44 1771 644001 FAX 44 1771 644005 EMAIL support netmcmarine co uk videoTXT man rev 10 1 January 2013 NETmc Marine Ltd 2012 2 of 40 1 Introduction 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 The videoTXT is able to decode and display some equipment specific strings GPS units ROV controllers etc Contact NETmc Marine Support to discuss how to get your equipment on the supported list 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
6. Overscan Area around the edge of a screen which may not be visible on some monitors oee section 5 3 videoTXT man rev 10 1 January 2013 37 of 40 NETmc Marine Ltd 2012 9 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 Notes 1 Whilst every effort has been made to ensure that the information contained in this manual is accurate no liability can be accepted for errors and omissions 2 Should this product be modified in any way by anyone other than a qualified NETmc Marine employee then NETmc Marine cannot be held liable for any consequences videoTXT man rev 10 1 January 2013 38 of 40 NETmc Marine Ltd 2012 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 Vibra
7. 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 10 1 January 2013 10 of 40 NETmc Marine Ltd 2012 5 Menu Structure The user can enter the menu system by pressing F1 whilst in scratch mode Control menu NOTE The example shows a screen where no 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 option 9 Analogue interface settings will only be shown if this option has been purchased with your videoTXT The menu options are described below with screen shots of the pages the user can expect to see 5 1 Help This option contains some basic operational and setup tips 2 clears the display if a stored page is active its text will be erased Fd 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 Ctr
8. on off state of video channels and 4 will be ignored f you have a single channel overlay the on off state of video channels 2 and 4 will be ignored videoTXT man rev 10 1 January 2013 6 of 40 NETmc Marine Ltd 2012 Compatibility with Oceantools Systems Function Subfunction Hex Code Dec Code Key Code Carriage return 1 _ 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 SettimetoTopCenre 01 1 Set time to Bottom Centre 02 42 _SettimetoTopleft 03 38 Set ime fo Top Right o pet tine we Potion tot 5 5 _ Set time to Bottom Right Set ime to Of 9 Eoo ME NENNEN SetdatetoTopCentre 01 1 J _SetdatetoTopleft 03 3 SetdatetoTopRight 04 4 OD Set date to Bottom Right 06 6 Set date to Off 0 0 Lo 9 M Setfottosmal 01 1 Setfottomedum 02 2 B Serial port 2 only Neither Time Date or Font changes are supported on Serial port 3 videoTXT man rev 10 1 January 2013 7 of 40 NETmc Marine Ltd 2012 4 Keyboard Command Index The keyboard must be connected to the front of the videoTXT prior to power up The videoTXT is des
9. 2012 2 of 40 Option 1 Select parser string NOTE videoTXT is able to decode and display some equipment specific strings GPS units ROV controllers etc connected to Serial 1 only Contact NETmc Marine Support to discuss how to get your equipment on the supported list Option 2 Set display positioning Set displa Positioning Display the parsed data on the 1st row of the display counting from the upy st row the lowermost row the Werte sllivennent Ssebtine celine E ER VIE ETE DE sas Et testem 01553005 alll sanum ESSE ES settungsamen If you have a GGA compliant GPS signal available it can be input to serial 1 and enabled using this menu to display latitude and longitude on screen NOTE GPS data should be 4800 8 N 1 An example of a GPS display is shown below i 57 30 6967 videoTXT man rev 10 1 January 2013 28 of 40 NETmc Marine Ltd 2012 NOTE Should the GPS signal disappear for 4 seconds or more the following warning message will appear 5 9 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 c
10. 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 5 9 3 Analogue input configuration CP IH AIK 1 Heading Des 11 370 2 1 0000 Bus 3 tooo Select the analogue channel which is to be edited by pressing the appropriate C selects the CP channel 1 selects the ALK 1 channel selects the AUK 2 channel selects the AUX 5 channel saves the new settings to memory 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
11. P ve CP ve Aux1 ve Aux1 Ov Aux2 ve Aux2 Ov Aux3 ve Aux3 Ov General Ground 34 of 40 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 be 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 NET MARINE IkGvtech Panther 17 acceptance tests Amerada Hess Ltd contractor Rovt ech Ltd Wesseli Highland ragle Component CP survey of avi Umbili eal Risers ROV riger 102 vidro Bef Caddie i LESEN UE nw Hmrnrri nr Haring oA 5 videoTXT man rev 10 1 January 2013 35 of 40 NETmc Marine Ltd 2012 T Troubleshooting Symptom Text not st
12. T man rev 10 1 January 2013 9 of 40 NETmc Marine Ltd 2012 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 Shift F2 Clears only the Serial Port 1 display F3 Enables disables the Serial Port 1 display F4 Selects scratch page freestyle volatile text 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 3 key commands can be used whichever page the user is currently on Ctrl F6 Clears stored page 2 Ctrl F7 Clears stored page 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 Ctrl l 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 Delete 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
13. USER GUIDE FOR NETmc MARINE videoTXT NE Tic MARINE Rev 10 1 Firmware version 6 04 6 06 January 2013 videoTXT man rev 10 1 January 2013 1 of 40 NETmc Marine Ltd 2012 Contents Th arigere Bert o p TT 3 2 CONME CUO g 4 Serial Command Index for input via the serial 6 A NRE VIOO OC OMe UNG OK TTE EET UD LT 8 5 IVA SIC Eq 11 se o 11 IN Se 12 5 3 Text size and area lt 1 nnn nn nna 16 94 VOX SACS SONITUS 19 ooscnabmer mie se DS tese eo peer EYE EE REPE ERE REDE 21 5 6 Display offset settings 23 5 7 Serial port settings and LAN Set Up cccceeccccsececceeeeeseeeesseeeesseesesseeeessaeeeseeeeesaees 24 Option 1 Use Serial port 2 or Network 24 Option 2 Serial port 25 Optio Network Interiace 2 55222 9242522322428545824298080800438409 408 46 02 09 909 9 55 9 02222 25 5 8 String parser settings 27 5 9 Analogue Nerac SOI
14. 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 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 42 5 instead of 0 to 5 an offset of 2 5 would be entered videoTXT man rev 10 1 January 2013 32 of 40 NETmc Marine Ltd 2012 X Y This sets the position of the display on screen Channel Prefix Suffix Gain Offset X YO Digits Heading Deg 2 2 3 2 2 2 2 2 i 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 Channel Prefix Suffix Gait ffset A Y Digits CP 1 0000 0 0000 Heading Deg 11 3750 0 0000 1 0000 0 0000 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
15. able appearing to move up and down screen Cause 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 Cure Clean up the signal check for bad connections double terminations If possible use a time base corrector An isolation transformer may be desirable especially Seaeye ROVs benefit greatly from an in line isolation transformer videoTXT man rev 10 1 January 2013 36 of 40 NETmc Marine Ltd 2012 8 Definition of Terms PAL NTSC Scratch page Channel titles Video encoding system typically used in UK Europe Australia and parts of Africa and Asia Video encoding system typically used in USA Canada Text is displayed on the screen as typed into the keyboard This is the default screen obtained upon first powering up the unit Text is lost if any other command is carried out Short title which can be displayed on each video channel in use eg Diver1 Diver2 etc GPS Global Positioning System U S space based global navigation satellite system which provides reliable positioning navigation and timing services to worldwide users on a continuous basis in all weather day and night NMEA National Marine Electronics Association They issue protocol on the relay of GPS signals Parsing Interpretation or translation of code
16. ae size for stored size for stored size size for stored Display overscan sett LI m port 2 or eT Ln Dp em ct ct rD er c LJ m De Qu po oO i Dp p dm I Cal HF m e Zw ngs et L C C51 amp GJ I3 rm bo bh 9 9 ES g 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 shade settings Set shade for serial port 1 Set shade for scratch page port 2 Set shade For stored page 1 Set shade for stored page 2 Set shade for stored page 3 Set shade for stored page 4 For reference the four sizes available are PAL NTSC Small font 69 columns 24 rows 20 rows Default font 52 columns 19 rows 16rows Medium font 34 columns 19 rows 16 rows Large font 32 columns 7 rows 6 rows videoTXT man rev 10 1 January 2013 16 of 40 NETmc Marine Ltd 2012 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 PAL 1i Small text 69 2d 2 Medium text 54 x 19 3 Large text G2 7 4 Default t
17. eo 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 10 1 January 2013 4 of 40 NETmc Marine Ltd 2012 When making a cable to link between videoTXT and 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 Note THIS EQUIPMENT MUST BE EARTHED videoTXT man rev 10 1 January 2013 5 of 40 NETmc Marine Ltd 2012 3 Serial Command Index for input via the serial port The videoTXT command structure follows the established industry standards A summary of the commands follows Compatibility with Taylor Lann C Systems Key Code FGesSceen 10 Cursor Right Cursor Down Carriage return OD 183 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
18. ext 52 x 19 OTE The serial text offset For the associated serial port has been reset to 1 1 Press any key to continue Option 7 Display overscan settings Display overscan settings 1 Enable display overscan Disable display ov NOTE When the overscan setting is changed all display offsets will be reset to 1 1 and all stored text pages will be cleared What is overscan Early monitors televisions varied in their displayable area because of manufacturing tolerance problems There were also effects from the early design limitations of linear power supplies whose DC voltage was not regulated as well as in later switching type power supplies This would cause the image to shrink when AC power browned out as well as a process called blooming where the image size increased slightly when a brighter overall picture was displayed Because of this TV producers could not be certain where the visible edges of the image would be In order to cope with this they defined three areas Title safe An area visible by all reasonably maintained sets where text was certain not to be cut off Action safe A larger area that represented where a perfect set with high precision to allow less overscanning would cut the image off Overscan The full image area to the electronic edge of the signal videoTXT man rev 10 1 January 2013 17 of 40 NETmc Marine Ltd 2012 Modern LCD monitors don t suffer from the same problem
19. hortcut key F5 or F6 or F7 or F8 videoTXT man rev 10 1 January 2013 8 of 40 NETmc Marine Ltd 2012 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 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 videoTX
20. igned to work with any PS2 keyboard A USB keyboard used via a PS2 adapter should also work but designs vary and so NETmc Marine cannot guarantee this 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 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 set up your stored text 1 select the text size required using the Control Menu option 3 2 select the required s
21. ilable 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 both the date and the time but depending on the location of the vessel may not be available Sync time with NMEA xxGGA Waitimnmg form fix Press Escape to cancel NOTE The date cannot be obtained from the NMEA unit using xxGGA information This function will try to ensure that the correct date is maintained when the time in your time zone crosses midnight but uou should always check and if necessary adjust the date ianuallu afterwards If possible you should use information to synchronise the overlay as this allows the date to be set bu the NMEA unit itself If the following message appears the string parser settings may need to be adjusted return to Option 7 of the Control Menu Sync time with NMEA xxGGA ERROR This function can only be used when serial port i has been configured to accept input from a NMEA Source via the menu Press any key to continue videoTXT man rev 10 1 January 2013 14 of 40 NETmc Marine Ltd 2012 Option 6 Sync time with NMEA xxRMC Sync time with NMEA xxRMC Wey rb Weyl fie ap 55 Press Escape to cancel If the following message appears the string parser settings may need to be adjusted return to Option 7 of the Control Menu sync time with NMEA ERROR This functi
22. ing HUA recalls sustem default settings saves the new settings to memory discards changes and returns Settings for AUX 1 Input range 5 Reference trim 9 Scaler setting i ADC output 6 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 In 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 scale 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 gt 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 videoTXT man rev 10 1 January 2013 NETmc Marine Ltd 2012 31 of 40 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
23. ioned 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 videoTXT man rev 10 1 January 2013 23 of 40 NETmc Marine Ltd 2012 1 Small text 69 x 24 2 Medium text 3d x 19 Large text 32 x d Default text 52 x Press any key continue Option 1 Use Serial port 2 or Network Interface If the LAN option has been purchased then the LAN interface works as a replacement to Serial Port 2 The user can select to either use Serial Port 2 or the LAN Once the second option Use network interface has been selected then a third option Network interface settings becomes visible 3 Network interface settings videoTXT man rev 10 1 January 2013 24 of 40 NETmc Marine Ltd 2012 Option 2 Serial port 3 settings Note these settings are visible if the 3 Serial Port option has been purchased oort 4 settings Enable serial port 3 Disable serial port lt 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 Option 3 Network interface settings Note these settings are visible if the LAN option has been purchased and the option Use Network Interface has been selected in the Serial po
24. l 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 10 1 January 2013 11 of 40 NETmc Marine Ltd 2012 5 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 Check current time and date Set current time and date Select date format Select current time zone Sunc time with NMEA x GGA Sunc time with NMEA Time and date display settings LOU CH tc Cal P2 I LE on 5y 232 Option 1 Check current time setting An example screen is shown here Check current time and date 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 el 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 discards all entries and returns to the Time and date settings menu videoTXT man rev 10 1 January 2013 12 of 40 NETmc Marine Ltd 2012 Option 3 Select date format Select date format 1 Select UK format dd mm uu 2 Select USA Format mm dd y
25. lay IN AUX 1 104 RUM 1 2 off mae AUX 2 AUX 3 Example with channels 1 and 2 selected videoTXT man rev 10 1 January 2013 NETmc Marine Ltd 2012 off 5y OFF 10V Example with channels 1 and 3 selected 30 of 40 5 9 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 accept 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 Settings For AUX 1 Input range 5 Reference trim Scaler setting ADC output Tab Cursor left right Cursor up down Backspace Return Escape Examples Settings For AUX 1 Input ranze 5Y Reference trim Scaler setting ADC output Reference trim cucles the input channel adjusts the reference trimming adjusts scaler sett
26. on can only be used when serial port i has been configured to accept input from a NMEA source via the menu Press any key to continue 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 ime and date display settings Settings for scratch page Settings For stored page 1 Settings for stored page 2 Settings for stored page 3 Settings For stored page 4 Ca A OMe videoTXT man rev 10 1 January 2013 15 of 40 NETmc Marine Ltd 2012 Time and date displa settings Display the time Display the date at the top at the top at the bottom at the bottom at the upper left at the upper left at the lower left at the lower right at the lower left at the lower right t display time at the upper right at the upper right don don t display date Tab cycles the time position setting Shift Tab cycles the date position setting Return saves the new settings to memory Escape discards all changes and returns to the Time and date settings menu 5 3 Text size and area settings 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 Set size for serial port 1 Set size for scratch p
27. onditions 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 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 Hnalozgue interface settings Hnalogue display settings Analogue input calibration Analogue input configuration 5 9 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 videoTXT man rev 10 1 January 2013 29 of 40 NETmc Marine Ltd 2012 Channels to display CP IH Au 1 AUR 2 AUX 3 off W oF F oFF Select which analogue channels are to be di
28. rt 2 settings The user is guided through a series of steps to set up the LAN interface Firstly the user selects the TCP port on which the serial server will operate videoTXT man rev 10 1 January 2013 25 of 40 NETmc Marine Ltd 2012 Serial TCP port Network name ddress m ethod Static IP address 192 158 1 Subnet mask 255 255 2755 Gateway i92 168 1 Serial port 2001 Network name 1012258 IP address method DHCP IP address 192 Subnet mask 255 2 Gateway Then the user chooses the method used by the overlay to determine its address settings DHCP or static Serial TCP port Network name IP address method DHCP Static IP address 2 168 i Subnet mask 255 255 255 Gateway 92 168 l to determine n tO continue videoTXT man rev 10 1 January 2013 26 of 40 NETmc Marine Ltd 2012 Next the user specifies the IP settings which will be used by the overlay Serial port Network name IP address method Static IP address 192 168 1 833 Subnet mask 255 255 255 0 Gateway 192 168 1 100 Serial TCP port Network name IP a ddr ss m thod IP address 192 Subnet mask 255 2 Gateway 192 1 Press Return to accept the changes Press Escape to cancel 5 8 String parser settings String parser settings 1 Select parser string 21 Set display positioning videoTXT man rev 10 1 January 2013 NETmc Marine Ltd
29. s which created the need for overscan in the first place so under normal settings users may feel that there is wasted area around the screen which the overlay text cannot reach For this reason an option has been created to enable the overscan region effectively allowing the text to write over a larger area It should be noted that if overscan is enabled all the overlaid text may not be visible if CRT monitors are used When overscan is enabled the screen area available to the overlay increases annotated as PAL and NTSC making the number of characters on each row and column ext size settings PRL 1 Small text 80 x 27 2 Medium text 40 x 21 4 Large text Default text 60 x 21 NOTE When the text size is changed using this option the displau offset for serial ports 2 and 3 as well as the scratch page will be reset to 1 1 With overscan enabled the four sizes available are PAL NISC Small font 80 columns 2 rows 23rows Default font 60 columns 21rows 1 rows Medium font 40 columns 21 rows 17 rows Large font 36 columns 7 rows 6 rows videoTXT man rev 10 1 January 2013 18 of 40 NETmc Marine Ltd 2012 5 4 Text shade settings Separate shades can be selected for the scratch and each of the four stored pages et shade for serial port 1 shade for scratch page port 2 shade for stored page 1 t shade for stored page et shade For stored page shade for stored page gt 1 2 3 d
30. 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 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
31. splayed and which are to be ignored with the Following keus adjusts adjusts adjusts adjusts setting of the CP channel setting of the AUK 1 channel setting of the AUX 2 channel setting of the ALA 5 channel 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 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 settings 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 IN 5Y AUX 1 5Y AUX 2 ioff AUX 3 off Example with CP and channel 1 selected Channels to display CP TH of F Channels to display CP IN off AUX 1 ioff AUX 2 ioff AUK 3 of d Example with no channels selected Channels to disp
32. tion 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 10 1 January 2013 39 of 40 NETmc Marine Ltd 2012 Note This equipment has been tested and found to comply 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 10 1 January 2013 40 of 40 NETmc Marine Ltd 2012
33. ws an example of a scratch page with the channel title enabled videoTXT man rev 10 1 January 2013 NETmc Marine Ltd 2012 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 Diver 1 22 of 40 5 6 Display offset settings 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 Display offset L offset for scratch page offset for port offset for port offset for port 3 i RES CO Ch m iT en it 2 When the display is cleared or the cursor is control code received on serial port 1 leave the cursor positioned at 1 1 Cursor right left adjust the column Field Cursor updown adjust the row Field Return saves the new settings to memory Escape discards all changes and returns to the Serial text offset menu When the display is E ET TET or the cursor is homed by a control code received on serial port 1 leave the cursor positioned at 1 5 When the display is cleared or the cursor is hom d by a control code received on serial port 1 leave the cursor posit
34. y 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 taken from the NMEA unit The control keys are Cursor up down increment decrement the interval to be added to subtracted from UTC to obtain the local time in your zone saves the new settings to memory discards all changes and returns to the Time and date settings menu Return Escape Select current time zone Time zone is UTC Oih 00m Time zone is UTC Oih 45m videoTXT man rev 10 1 January 2013 13 of 40 NETmc Marine Ltd 2012 Option 5 Sync time with NMEA It may be desirable to have the internal clock in the overlay synchronised with a GPS receiver to ensure information displayed on the overlay matches the survey position time With an NMEA string at 4800 baud being input to serial 1 of the overlay and the String Parser settings enabled see section 5 7 the steps below will enable time sync Notes on the 2 GPS systems the GGA signal is ava
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