Kantronics KPC–3 Plus User Manual page 96

minutes from the time the user sets the time that the beacon should be transmitted. As
an example, if you set the BLT command for LT 1 (BLT 1) with the command:
BLT 1 EVERY 00:30:00 START 00:00:01
the TNC would transmit a beacon at 00:00:01 (time after midnight) and every 30
minutes after that. The second user could set the BLT with the command:
BLT 1 EVERY 00:30:00 START 00:01:01
In this case, these two users would never beacon at the same time, in fact they would
beacon 1 minute apart. Using this system for our example, it is possible to set all thirty
users to beacon one minute apart, avoiding collisions.
Tracking without Beacons
You may configure the TNC to store the LT ―beacons‖ in the LTRACK buffer without
transmitting the beacons. To do this, set the LTP to NONE for the associated LT buffer:
LTP 1 NONE
When the destination call (path) is set to NONE, the TNC will not transmit the beacon,
but since the BLT command is still active, the data will be stored in the LTRACK buffer.
Remote Access and GPS
When the TNC is in GPS Mode, the serial port is expecting data only from a GPS unit,
hence, it cannot process any ―normal‖ commands. Should you need to change any of
the TNC commands, however, there are two options: 1) exit the GPS Mode using a
terminal, or 2) connect to the TNC remotely by radio (MYREMOTE) and change the
commands.
When you connect remotely to the TNC (and properly respond to the password security
check) you can change any parameters including the GPS parameters. You may also
wish to send a command string to your GPS unit. This is accomplished with the RPRINT
command. For example, to send the string $PGRMO,GPGSA,1 to the GPS unit,
connect to the MYREMOTE of the TNC, verify the password, and send
RPRINT $PGRMO,GPGSA,1
to the MYREMOTE. The TNC simply sends this string to its serial port (which is
connected to the GPS receiver).
Other Notes
The LT buffers, LT beacons and LTRACK buffer can be used even without a GPS unit
attached. You can manually set the LT buffers to any text you want (up to 128
characters total) using the LT command:
LT 1 This is ltext buffer number 1
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