Garmin GPS 16-HVS Manuale di istruzioni - Pagina 13

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CallTable GGA

CallTable Parsed

NextScan

SerialClose (com1)

EndProg

5. Troubleshooting

5.1 GPS Setup and Function

Testing and evaluation of serial communications is best done by reducing the

whole system to small manageable systems. Usually some portions of the

whole system are working. The first steps involve finding what is working.

During this process you may find parts of the system that are not working or

mistakes that can be easily corrected. Fix each subsystem before testing

others.

Test the GPS16-HVS for proper operation including the baud rate and output

string. Use a computer, terminal emulator software, a serial port (RS232), and

a 9-pin to 9-pin serial cable. The computer and serial port can be the same as

used to communicate with the datalogger. Terminal emulation software is

pretty common. Hyperterm is supplied as part of Windows ™ and works.

Procomm ™ is another communication software package that works well.

Set up the software for the correct serial port, 1200 baud, 8 data bits, 1 stop bit

and no parity. Flow control should be off. Using the serial cable, connect the

GPS16-HVS to the computer serial port. Power up the GPS16-HVS. The

GPS antenna should have a clear view of the sky. Don't expect the GPS

antenna to work indoors. The $GPGGA string should be displayed once a

second. Make sure the $GPGGA string is showing a valid GPS fix. A valid

GPS fix will display time, position and have a GPS quality number greater

than zero. Part number L17218, RJ45 to DB9 adapter, is needed to connect the

GPS16-HVS to the computer serial cable.

GPS16-HVS GPS Receiver