Comtech EF Data SLM-5650A - Manual (Page 360)

SLM-5650A Satellite Modem Revision 8
Appendix C MN-SLM5650A
C–8
C.6.2 Modulator (Tx) Commands / Queries
Tx Priority System = (Highest priority) MOM, RFB, ITF (See Sect. C.6.1), TFM, TFT, TMD, TCR, and TDR (Lowest Priority). Priority
commands 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
Tx Overhead
Type
TFM= 1 byte, value of
0 thru 2, 4
Command or Query.
Tx Overhead Type, where:
0=None (Unframed)
1=IBS
2=IDR
4=AUPC
Depending on Modem mode, not all selections will be valid.
Example: TFM=0 (selects Unframed mode)
TFM=
TFM?
TFM*
TFM#
TFM? TFM=x
(see Description
of Arguments)
Tx FEC Type TFT= 1 byte, value of
0 thru 6
Command or Query.
Tx 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: TFT=2 (selects Turbo coding)
TFT=
TFT?
TFT*
TFT#
TFT? TFT=x
(see Description
of Arguments)
Tx Modulation
Type
TMD= 1 byte, value of
0 thru 4
Command or Query.
Tx Modulation type, where:
0=BPSK
1=QPSK
2=OQPSK
3=8PSK
4=16QAM
Depending on FEC type, not all selections will be valid.
Example: TMD=1 (selects QPSK)
TMD=
TMD?
TMD*
TMD#
TMD? TMD=x
(see Description
of Arguments)