Comtech EF Data CDM-570 - Manual (Page 364)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Appendix D MN/CDM570L.IOM
D–14
D.6.2 Receive (Rx) Commands and Queries
Rx Priority System = RFT (Highest priority), RMD, RCR, and RDR (Lowest Priority), indicated by shading. Any change to a higher
priority parameter can override any of the parameters of lower priority.
Parameter
Type
Command
(Instruction
Code and
Qualifier)
Arguments for
Command or
Response to
Query
Description of Arguments
Response to
Command
Query
(Instruction Code
and Qualifier)
Response to
Query
Rx FEC Type RFT= 1 byte,
value of 0 thru 6 Command or Query.
Rx FEC Type, where:
0=None (uncoded – no FEC) with differential encoding ON
1=Viterbi
2=Viterbi + Reed-Solomon
3= Reserved – do not use
4= Reserved – do not use
5=TCM + Reed-Solomon
6=Turbo
Example: RFT=1 (which is Viterbi only) RFT=
RFT?
RFT*
RFT#
RFT+ RFT? RFT=x
(same format
as command
argument)
Rx Demod type RMD= 1 byte,
value of 0 thru 5 Command or Query.
Rx Demodulation, where:
0=BPSK
1=QPSK
2=OQPSK
3=8PSK
4=16QAM (Turbo or Viterbi + RS only)
5=8-QAM (Future option)
Depending on FEC type, not all of these selections will be valid.
All other codes are invalid.
Example: RMD=2 (selects OQPSK) RMD=
RMD?
RMD*
RMD#
RMD+ RMD? RMD=x
(see Description
of Arguments)