User's Manual

Company Confidential 60 Raveon Technologies Corp.
ATFX
Frequency for this channel. Set to your frequency.
ATMT 0 0 for normal Packetized operation. Default mode.
ATAK 0 for no ARQ, 1 if this unit sends ACKs. Default is no ARQ.
ATRB Set the number of retries if ARQ is used (x). 0 if no ARQ used.
Factory default is no ARQ.
ATBD Serial port baud rate
ATMY The ID of this unit. Default is 1234.
ATMK The network address mask. Default is FFFF.
ATDT The address of the unit this modem will talk to. Default is 1234.
ATBC Enable/disable busy channel lock-out. Default is off, 0.
6. Connect your serial data device to the 9-pin connector on the front of the
m
odem.
The radio is now ready to use. Any serial data going into the modem will be
transmitted over the air, and any data received over the air will be sent out the
serial port.
Remember, that from the factory, all M7 modems are configured to simply work.
Plug in power and connect to the serial port at 9600 baud, and the modems will
communicate on the default channel. Change the channel frequency to your
specific frequency, and they will be ready to work on your channel.
6.2. Programming Channels and Frequencies
The M7 modem has memory for up to 6 channels. A channel is a pair of
frequencies, one for transmit and one for receive. They may be different or they
may be the same. You may program any valid frequency into any channel
number. To program a channel, perform the following steps.
1. Change to the channel you wish to program, using the ATHP x command,
where x is the channel number.
2. Program the frequency for this channel x, using the ATFT, ATFR, or ATFX
command. Note that the frequency my be entered in MHz as long as you
use a decimal point. For Example, enter ATFX 450.1 to set the channel
frequency to 450.100MHz. Alternately, you may enter the frequency in hertz
by entering ATFX 450100000. You must enter all of the zeros if you enter the
frequency in hertz.
3. Review the frequency setting with the ATFT, ATFR, or ATFX command. To
see a list of all of the channels , enter ATF.
4. To change the radio channel, use the ATHP x command while the modem is
in the command mode.
Due to the nature of the synthesizer used in the M7’s radio, the frequency
programmed into the unit must be an even multiple of its internal reference
frequency. For narrow-band radios (12.5kHz channels), the user’s frequency
must be a multiple of either 6.25khz or 5.00kHz. For wide-band models, the
frequency must be an even multiple of 10kHz or 12.5kHz.