Timewave DSP-232, Operating Manual

Page: 118 / 271

Chapter 6 GPS Applications
GPOLLCal
call[n] Default: None
Mode: GPS packet
call - The Call Sign you wish to use for polling
n
- Numeral indicating an optional SSID
The POLLCal can be any call sign other than one already programmed in the DSP-232. If programmed the same as
one of the other callsigns, this feature will not work. When a packet is received addressed to this callsign, the DSP
will begin parsing the programmed NMEA command or commands. When the NMEA sentances are successuflly
received, the DSP will transmit the GPS data as a UI-Frame. If no data or incorrect data is received, the DSP will
transmit nothing.
GPSAuto ON|OFF Default: OFF
ON When powered up or restarted, the DSP switches to GPSMode 1 if it parses its GNMEA1 or 2 sentance
within the first 4 seconds after power up.
OFF
The DSP powers up normally.
If you are using your DSP in your vehicle as a stand alone tracking device and in your home for regular packet
operation, this command will save you a lot of hassels. Simply program all your GPS parameters except for the
GPSMode command, turn GPSAuto ON and you are set. Each time you turn your TNC on, the DSP will spend the
first four seconds after power up trying to parse its GNMEA sentance or sentances. If it successfully parses one or
both of them, it will automatically switch to GPSMode 1.
To have the DSP auto detect a GPS receiver, follow these steps:
1) Be sure you have your GPS command programmed.
2) Be sure GPSAuto is turned ON.
3) Connect the GPS receiver to the DSP serial connector.
4) Apply power to the GPS receiver (not the DSP-232 yet!)
5) Be sure that the GPS receiver is outputting its NMEA data before powering up the DSP.
6) Power up the DSP and within 4 seconds, you should notice the DSP transmit (TX) LED lighting to transmit its
location.
GPSMode n Default: 0 Disabled
Mode: GPS packet
This is a variable ranging from 0-2 that selects a specific mode of opration specific to GPS. Three CTRL-C’s returns
unit to GPSMode 0.
0 = Normal packet TNC operation. (GPS operation disabled.)
1 = DSP-232 connected directly to a GPS receiver.
The DSP-232 will begin parsing its programmed NMEA sentances only when LOCtx timer expires or if the DSP-
232 receives a UI frame address to its “POLLCall”. After the NMEA commands are parsed, the DSP-232 will
transmit the inofrmation obtained as a UI-Frame.
2 = DSP-232 connected to a PC running APRS. In this mode, the DSP-232 will power-up in converse mode.
GREMprog ON|OFF Default: OFF
ON Remote programming is enabled in GPS mode.
OFF
Remote programming is disabled in GPS mode.
September, 05 6-9