Comtech EF Data CDM-550T Manual page 124

Remote Control
Parameter Command
Type (InstructionC
ode and
qualifier)
Rx FEC Type RFT=
Rx FEC RCR=
Code Rate
Rx Modulation RMD=
Type
15–10
Arguments for Description of arguments
Command or (note that all arguments are ASCII numeric codes, that is,
Response to ASCII codes between 48 and 57)
Query
1 byte, value of Command or Query.
0 through 8 Rx FEC decoding type, where:
0 = None (uncoded - no FEC)
1 = Viterbi
2 = Sequential
3 = Viterbi + Reed-Solomon
4 = Sequential + Reed-Solomon
5 = Rate 3/4 QPSK Turbo (S/W Version < 1.15)
6 = Rate 21/44 BPSK Turbo (S/W Version > 1.14)
7 = Rate 5/16 BPSK Turbo (S/W Version > 1.14)
8 – Rate 3/4 OQPSK Turbo (S/W Version >1.18)
All other codes invalid.
Example: RFT=1 (which is Viterbi coding)
Note: If the RS Codec option is not installed, and the argument
3 or 4 is used, the target will return RFT? If the Turbo Codec
option is not installed, and the argument 5 or greater is used,
the target will return RFT? Use EID? to query the options
fitted.
Values 5-8 may affect RCR or RMD.
1 byte, value of Command or Query.
1,3, 7, 8 or 9 Rx FEC Code rate, where:
1 = Rate 1/2
3 = Rate 3/4 (must be set for Rate 3/4 Turbo)
7 = Rate 7/8
8 = Rate 21/44 (must set for Rate 21/44 Turbo)*
9 = Rate 5/16 (must set for Rate 5/16 Turbo)*
All other codes invalid.
Example: RCR=1 (which is Rate 1/2)
* Only valid for S/W Version >1.14.
As a Query, returns 0 if Uncoded is selected for FEC. Setting 8
or 9 may affect RFT and RMD.
1 byte, value of Command or Query.
1, 2 or 3 Rx Modulation type, where:
1 = BPSK (must be set for Rate 21/44 or 5/16 Turbo)
2 = QPSK (must be set for Rate 3/4 Turbo QPSK mode)
3 = OQPSK (must be set for Rate 3/4 Turbo OQPSK mode)
All other codes invalid.
Example: RMD=1 (BPSK)
CDM-550T Satellite Modem
Response to Command Query
(target to controller) (Instruction
Code and
qualifier)
RFT= (message ok) RFT?
RFT? (received ok,
but invalid argument
found)
RFT* (message ok, but
not permitted in current
mode)
RCR= (message ok) RCR?
RCR? (received ok,
but invalid argument
found)
RCR* (message ok, but
not permitted in current
mode
RMD= (message ok) RMD?
RMD? (received ok,
but invalid argument
found)
RMD* (message ok, but
not permitted in current
mode)
Response to query
(target to controller)
RFT=x
(same format as
command arguments)
RCR=x
(same format as
command argument)
RMD=x
(same format as
command argument)
Rev. 1.3