C.6.3 Demodulator (Rx) Commands / Queries - Comtech EF Data SLM-5650A Installation And Operation Manual

SLM-5650A Satellite Modem
Appendix C
C.6.3 Demodulator (Rx) Commands / Queries
Rx Priority System = (Highest priority) MOM, RFB, ITF (See Sect. C.6.1), RFM, RFT, RMD, RCR, and RDR (Lowest Priority). Priority
commands are indicated by
Command
Parameter (Instruction
Type Code and
Qualifier)
Rx Framing RFM= 1 byte, value of
Mode 0 thru 2, 4
Rx FEC Type RFT= 1 byte, value of
0 thru 6
Rx Demod type RMD= 1 byte, value of
0 thru 4
. Any change to a higher priority parameter can override any of the parameters of lower priority.
shading
Arguments for
Command or
Response to
Query
Command or Query.
Rx Overhead Type, where:
0=None (Unframed)
1=IBS
2=IDR
4=AUPC
Depending on Modem mode, not all selections will be valid.
Example: RFM=0 (selects Unframed mode)
Command or Query.
Rx FEC coding type, where:
0=None (Uncoded)
1=Viterbi
2=Turbo
3=Sequential
4=LDPC ULL (Ultra Low Latency)
5=LDPC LL (Low Latency)
6=LDPC HP (High Performance)
Example: RFT=2 (selects Turbo coding)
Command or Query.
Rx Modulation type, where:
0=BPSK
1=QPSK
2=OQPSK
3=8PSK
4=16QAM
Depending on FEC type, not all selections will be valid.
Example: RMD=1 (selects QPSK)
Description of Arguments
C–14
Revision 8
MN-SLM5650A
Query
Response to (Instruction
Response to Query
Command Code and
Qualifier)
RFM= RFM? RFM=x
RFM? (see Description
RFM* of Arguments)
RFM#
RFT= RFT? RFT=x
RFT? (same format
RFT* as command
RFT# argument)
RMD= RMD? RMD=x
RMD? (see Description
RMD* of Arguments)
RMD#