Connecting & Configuring the GPS16 We recommend that the Garmin GPS16 is purchased for use with the time inserter. The GPS16 is supplied with its connecting cable terminated with an RJ45 connector. The time inserter is supplied with a female RJ45 to DB9 adapter combined with a power connector which can be connected to the GPS16 and a power supply. You should use a regulated power supply able to provide 12V DC. Please ensure that the power supply has the current capacity to power the equipment you intend to connect to it. The time inserter draws approximately 50mA. The GPS16 HVS draws 65mA@12V. Note that the cruxiform power connector shown has two DC power plugs, 2.5mm & 2.1mm. The time inserter has a 2.1mm power socket and the power connector on the RJ45 to DB9 adapter is 2.5mm. Both devices can therefore be powered from the same supply. Before the GPS16 will work with the time inserter it will need to be configured to work correctly. To do this you will need to connect the GPS16 to the serial port of your PC. If you have a laptop that does not have a serial port you will need to purchase a serial to USB adaptor. When you make your order we will email you the Garmin configuration program, Snsrcfg.exe, and a file with the correct configuration for use with the time inserter. For future reference you can also download the STVASTRO.cfg file here. The Garmin configuration program can then be used to download the correct settings to your GPS16 from your PC. You must disconnect the power to the GPS16 then re-connect it again before the changes made will take effect. When the GPS16 has been programmed it can be connected to the time inserter. All connections and disconnections to the time inserter unit should be made with the power off. You should plug the 2.1mm power connector into the 2.1mm power socket on the front panel. Use the short serial cable to connect the RJ45 adaptor on the GPS16 to the time inserter. You can then connect video in / out via the front panel. Please note that when the GPS16 is powered up it may take a period of time to acquire a GPS fix and start to transmit data. Connecting the GPS35 The Garmin GPS35 is supplied by Garmin with its connecting cable terminated with bare wire ends. You will need to purchase a female DB9 shell and solder it to this cable to allow the GPS35 to be connected to the time inserter. You will also need to wire a power connector to the GPS cable inside this DB9 shell. The female DB9 can then be connected to the serial cable with the male DB9 connector and 3.5mm jack plug provided with the time inserter. GPS DB9 cable signals Female Socket No. Signal GPS connector Socket 2 Serial data out White TXD1 Socket 3 Serial data in Blue RXD1 Socket 5 Ground Black GND Socket 9 1 PPS signal in Grey 1PPS Power Socket Connection Power socket wire GPS connector Positive Red Vin Negative Black GND Configuring the GPS35   The GPS35 must be correctly configured to work with the inserter. Only the GPRMC and GPGGA data sentences are required. Examples of the NMEA data sentences read by the time inserter $GPRMC,101328,A,5227.3688,N,00004.2494,W,0.0,0.0,301100,3.1,W,A*12 $GPGGA,101328,5227.3688,N,00004.2494,W,1,03,2.6,-13.8,M,47.1,M,,*4A Refer to the Garmin GPS35 manual for full instructions on how to program the GPS unit to transmit only the GPRMC and GPGGA data sentences. This configuration can be done using proprietary Garmin PC software or using a serial terminal program such as hyperterminal as detailed below. The terminal settings for a new GPS unit should be 4800 baud, 8 data bits, no parity, 1 stop bit. In summary you need to send the GPS35 the data sentences shown below. Each of the sentences must be terminated with a carriage return linefeed pair, <CR><LF>. You should check the setting of your terminal program to ensure that a carriage return key stroke is correctly translated into a carriage return linefeed pair. In hyperterminal this setting is found on the ASCII setup dialog box. To switch off all NMEA sentences and then enable only the GPRMC and GPGGA data sentences the following should be sent to the GPS35 / 16. $PGRMO,,2<CR><LF> $PGRMO,GPRMC,1<CR><LF> $PGRMO,GPGGA,1<CR><LF> To configure the baud rate to 4800 and the 1PPS signal to 1Hz, 20ms duration the following PGRMC data sentence should be sent to the GPS35: $PGRMC,,,,,,,,,,3,,2,0<CR><LF> To use HyperTerminal to talk to the GPS35 unit Windows users should follow the instructions below. Open a copy of Notepad under Start/Program/Accessories/Notepad in your start menu. Cut and paste the following NMEA 0183 sentences into the Notepad and hit the <Enter> key, leaving the cursor on an empty line below all of the sentences. $PGRMO,,2 $PGRMO,GPRMC,1 $PGRMO,GPGGA,1 $PGRMC,,,,,,,,,,3,,2,0 Hit File/SaveAs and store the file with a .txt extension into your c:\Program Files\Accessories\HyperTerminal directory (for Windows95 users, NT has Hypertrm.exe in a similar directory), so that you can send it with HyperTerminal to your unit. To run HyperTerminal, hit Start/Programs/Accessories/HyperTerminal. This will bring up the HyperTerminal folder. The first time you go to this folder, there will be no connection icon for talking to your GPS receivers. Here is how to make one in Windows95 (NT will be similar): 1) Run Hypertrm.exe -- A "Connection Description" box will appear 2) Name the connection something that you want to associate with talking to the GPS -- Example: GPS or GPSinit or InitGPS ... 3) Click <OK> -- This brings up the Phone number box 4) Use the drop-down menu off the "Connect using" line to select "Direct to Com [n]", where n is the communications port you will use to talk to the GPS 5) Click <OK> -- This brings up the "COM[n] Properties" box 6) Use the drop-down menus to select Bits per second = "4800", Data bits = "8", Parity = "None", Stop bits = "1" and Flow control = "None" 7) Click <OK> If you have a GPS receiver connected and powered up and it has output sentences enabled at 4800 baud, you should see data coming across your screen. 8) Click File/Properties -- This brings up the [connection name] Properties box 9) Click the Settings tab 10) Click the ASCII Setup button 11) Check the "Send line ends with line feeds" checkbox 12) Check the "Append line ends to incoming line feeds" checkbox (This will double space your incoming NMEA sentences) 13) Click <OK> 14) Click <OK> 15) Click File/Save -- This will save a connection under the name you gave in step 2) above. This connection will appear as an icon in your HyperTerminal folder. Use it next time to avoid all of the setup you just did by following steps 1) through 14). 16) Click Transfer/Send Text File... to send the file you saved with Notepad.exe above. You must switch the power to the GPS35 / 16 off then on again before the changes made will take effect Instructions courtesy of Garmin techical support forwarded by Michael Rudolph. Home Back © The BlackBoxCameraTM Company Limited 2004