Comtech EF Data CDM-550T - Manual (Page 127)

CDM-550T Satellite Modem Revision 3
Remote Control MN/CDM550T.IOM
15–11
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
Frequency RFQ=
8 bytes
Command or Query.
Rx Frequency, 52 MHz to 88 MHz, (70 MHz band) or 104 MHz
to 176 MHz (140 MHz band).
Resolution = 100 Hz.
Example: RFQ=143.4567 (which is 143.4567 MHz)
Note: Querying ‘Options Fitted’ (using EID?) will indicate if the
unit is 70 MHz or 140 MHz IF band RFQ= (message ok)
RFQ? (received ok,
but invalid arguments
found)
RFQ* (message ok, but
not permitted in current
mode) RFQ? RFQ=xxx.xxxx
(same format
as command
arguments)
Rx Data
Rate RDR= 8 bytes Command or Query.
Rx Data rate, in bps, between 2.4 kbps and 2048 kbps.
Resolution = 1 bps.
Example: RDR=002.400 (which is 2.4 kbps) RDR= (message ok)
RDR? (received ok,
but invalid arguments
found)
RDR* (message ok, but
not permitted in current
mode RDR? RDR=xxxx.xxx
(same format
as command
arguments)
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
Command or Query.
Rx Clock mode, where:
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)