Timewave PK-900, Operating Manual

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10 10 10 10 10 / TNC GPS Upgrade Addendum
GLOCtx “n” Default: 0 (00 sec.)
“n” - 0 to 255 sets the location timing in ten-second increments.
“0” - Zero disables automatic location transmissions.
GLOCtx is used to periodically transmit GPS data received on the serial port. GLOCtx is pro-
grammable from 0 (never) to 2500 seconds in 10 second intervals. A transmission will only occur
if, GPSMode = 1 or 2, GLOCtx is not zero, and the correct NMEA information is received on the
serial port.
GNMEA1 Text (0-8 chars)
Default: GPGLL (GPS position only)
This is the string the TNC will parse from the NMEA device. The text can be any ASCII charac-
ter.
GNMEA2 Text (0-8 chars) Default: None
This is another string the TNC will parse from the NMEA device. The text can be any ASCII
character.
GPOLLCal call[-”n”] Default: None
call - The callsign you wish to use for polling.
“n” - Numeral indicating an optional SSID.
The POLLCal can be any callsign other than one already programmed in the TNC. If programmed
the same as the MYAlias, MYCall, MYGate, or MYMail callsigns, this polling feature will not
work. When a packet is received addressed to the GPOLLCall callsign, the TNC will begin pars-
ing the programmed NMEA command or commands. When the NMEA headers are successfully
received, the TNC will transmit the GPS data as a UI-Frame. This GPOLLCall can also be used
for digipeating.
GPSAuto ON|OFF Default: OFF
ON - When powered up or restarted, the TNC switches to GPSMode 1 if it parses its GNMEA1 or
2 sentence within the first 4 seconds after power up.
OFF - The TNC powers up normally.
If you are using your TNC 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 hassles. Simply program all your
GPS parameters except for the GPSMode command, turn GPSAuto ON and you’re set. Each time
you turn your TNC on, the TNC will spend the first four seconds after power up trying to parse its
GNMEA sentence or sentences. If it successfully parses one or both of them, it will automatically
switch to GPSMode 1.
To have the TNC 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 TNC serial connector.