Company Confidential
16
Raveon Technologies Corp.
4.9. Command Mode Commands
AT
Command
Command Description
Parameters
Factory
Default
AK
Enable/Disable ARQ – When ARQ is enabled, this modem
will automatically send an ACK packet back to a modem that
sends it data. 0=off, 1=on.
Range: 0 – 1
0 (no AKCs
sent)
AT
Silence AFTER Sequence - Sets period of silence after the
command sequence characters in mS.
Range:0 – 1000
(mS)
500
BD
Baud Rate
– Sets serial com port baud rate (bps). Over-the-
air (throughput) baud rate is set with ATR2 command.
If a PC’s serial baud rate is set higher than the fixed over-the-
air baud rate of the module, hardware handshaking may be
required.
Range: 0
– 7
0 = 1200 5= 38400
1 = 2400 6=57600
2 = 4800 7=115200
3 = 9600
4 = 19200
3
BC
Busy Channel Lock Out – Enable/disable the BCL. If
enabled, the modem will not transmit on a radio channel that
is busy (has RF on if). 0-OFF, 1=ON.
Range: 0-1
0
BT
Silence BEFORE Sequence – Sets period of silence before
the command sequence character in mS.
Range: 0-1000
mS
500
BW
Set/Read IF Bandwidth - Sets the IF bandwidth to narrow
(N) or wide (W). Narrow is for 12.5kHz channels, and wide is
for 25 or 30kHz spaced channels. This command is only
used on the VHF version of the product. The UHF does not
support w
N
N or W
CD
Carrier Detect Threshold – Read/set the carrier detect
threshold, in dBm. -113 means -113dBm. Version firmware
and higher.
-113
-120 to -60
CH
Configure Hardware Flow Control – Enable (1) or disable
(0) flow control. When enabled, the modem will monitor the
RTS line, and if it is negated, stop sending data out the serial
port. If disabled, the modem will ignore the state of RTS, and
always send out characters.
1 = Enable
0 = Disable
0
CT
Command Time Out – If no valid commands have been
received via the serial port within this time period (in
milliseconds), modem returns to normal operation mode from
Command mode. If the CONFIG button inside the M8 is
pressed, this parameter will be automatically set to 60000.
Range: 100-60000mS
60000
DCD
Invert DCD line. Use in conjunction with ATR1 to set DCD
line functionality
0-1
0
DT
Destination Address to call
– Sets address of the modem to
send data to. Note, this parameter is entered in HEX format.
Each digit may be a 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,or an F.
Range: 0-FFFF
1234
E
Echo
–
Character echo set on (E1) or off (E0). This applies to
the Command Mode only.
Range: 0 , 1
1 (echo)
F
Display frequencies – Display all of the frequencies
programmed into all of the channel memories.
N/A
FT
Transmit Frequency
–
Program the transmit frequency for
this channel. Enter in Hz or in MHz. The frequency will
Range:
See product data
sheet. For MURS products,
See product
data sheet.
