Receive (Rx) Commands And Queries - Comtech EF Data CDM-570 Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Appendix D
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.
Command
Parameter (Instruction
Type Code and
Qualifier)
Rx FEC Type RFT= 1 byte,
value of 0 thru 6
Rx Demod type RMD= 1 byte,
value of 0 thru 5
Arguments for
Command or
Response to
Query
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)
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)
Description of Arguments
D–14
Revision 12
MN/CDM570L.IOM
Query
Response to
(Instruction Code
Command
and Qualifier)
RFT= RFT? RFT=x
RFT? (same format
RFT* as command
RFT# argument)
RFT+
RMD= RMD? RMD=x
RMD? (see Description
RMD* of Arguments)
RMD#
RMD+
Response to
Query