Kantronics MT1200, User Manual

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Exiting POLL Mode
If you want to exit POLL mode to "fine tune" parameter settings (or for any other
reasons), the command mode of the modem can be regained as follows:
If CONMODE = CONV
Enter: 0000QUIT<cr> (NOTE: QUIT MUST BE IN UPPER CASE)
If CONMODE = TRANS
Use the transparent data escape sequence, i.e., send a series of three control-Cs
(unless a different control character has been defined). (See TRANS command in the
Reference Manual).
Modem Mode
In MODEM mode, the TNC demodulates the audio signal from the radio on port 1 and
passes this data through to its RS232 port unmodified. No “protocol” adjustments are
made to the data; the TNC simply acts as a dumb modem. In other words, it simply
reflects out the RS232 port what it “sees” coming in the radio port. For example, if ASCII
information is received at 1200 baud, the TNC presents your computer with ASCII at
1200 baud. With a simple terminal program running at 1200 baud too, you’d be able to
copy the text.
To place the TNC in modem mode use the INTface command. At the cmd: prompt, type
INT MODEM and return. Then turn your TNC power OFF and back ON.
To leave modem mode, send three Ctrl+C (command) characters to the TNC at 1200
baud. If ABAUD was set to something other than 1200, that setting will remain after you
exit modem mode. Hence it may be convenient for you to set the TNC to 1200 baud
before entering modem mode.
➔
Note: Some computers may lose some of the data stream if a full RS232 cable is used.
This can occur because the RS232 DCD line, which is “tied” to the TNC’s receive LED,
may be cycling up and down. In this case, set CD to EXTERNAL before entering INT
MODEM.
Copying Weather Broadcasts NWS EMWIN
MODEM mode can be used to copy emergency weather broadcasts by the National
Weather Service. The NWS Emergency Managers Weather Information Network
(EMWIN) is a wireless direct-to-computer information service that the National Weather
Service (NWS) provides with help from the Federal Emergency Management Agency.
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