Comtech EF Data CDM-500 - Manual (Page 74)

CDM-500 Closed Network Satellite Modem Remote Control
Rev. 1.3 B–9
Parameter
Type Command
(Instruction
Code and
qualifier) Arguments
for Command
or Response to
Query Description of arguments
(note that all arguments are ASCII numeric codes,
that is, ASCII codes between 48 and 57) Response to
Command (target to
controller) Query
(Instruction
Code and
qualifier) Response to
query (target
to controller)
Rx FEC Code
Rate RCR= 1 byte, value of
1,3 or 7 Command or Query.
Rx FEC Code rate, where:
1 = Rate 1/2,
3 = Rate 3/4,
7 = Rate 7/8
All other codes invalid.
Example: RCR=1 (which is Rate 1/2) RCR= (message ok)
RCR? (received ok,
but invalid argument
found)
RCR* (message ok,
but not permitted in
current mode RCR? RCR=x
(same format as
command
argument)
Rx
Modulation
Type RMD= 1 byte, value of
1or 2 Command or Query
Rx Modulation type, where:
1 = BPSK
2 = QPSK
All other codes invalid.
Example: RMD=1 (BPSK) RMD= (message ok)
RMD? (received ok
but invalid argument
found)
RMD* (message ok,
but not permitted in
current mode) RMD? RMD=x
(same format as
command
argument)
Rx Spectrum
Invert RSI= 1 byte, value of
0 or 1 Command or Query.
Rx Spectrum Invert selection, where:
0 = Normal
1 = Rx Spectrum Inverted
All other codes invalid. RSI= (message ok)
RSI? (received ok,
but invalid argument
found)
RSI* (message ok,
but not permitted in
current mode) RSI? RSI=x
(same format as
command
argument)
Rx
Descrambler RDS= 1 byte, value of
0 or 1 Command or Query.
Rx De-scrambler state, where:
0 = Off
1 = On (V.35 in unframed mode, synchronous in
framed mode
All other codes invalid.
Example: RDS=1 (which is de-scrambler On) RDS= (message ok)
RDS? (received ok,
but invalid argument
found)
RDS* (message ok,
but not permitted in
current mode) RDS? RDS=x
(same format as
command
argument)
Rx Demod
Acq Sweep
Width RSW= 2 bytes,
numerical
Command or Query.
Rx ± acquisition sweep range of demodulator, in
kHz, ranging from ± 1 kHz to ± 30 kHz.
Example: RSW=09 (which is 9 kHz) RSW= (message ok)
RSW? (received ok,
but invalid arguments
found)
RSW* (message ok,
but not permitted in
current mode) RSW? RSW=xx (same
format as
command
arguments)
Rx Clock
Mode RCK= 1 byte, value of
0 or 1 Rx Clock mode, where:
Command or Query.
0 = Buffer disabled
1 = Buffer enabled
All other codes invalid.
Example: RCK=0 (which is buffer disable) RCK= (message ok)
RCK? (received ok,
but invalid argument
found)
RCK* (message ok,
but not permitted in
current mode) RCK? RCK=x
(same format as
command
argument)