Comtech EF Data CDM-625 - Page 490

CDM-625 Advanced Satellite Modem Revision 13
Appendix D MN-CDM625
D–20
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
Rx FEC Type
RFT=
1 byte, value
of 0 thru 9, A,
B
Command or Query.
Rx FEC Type in the form x, where:
0=None (uncoded) with differential encoding ON
1=Viterbi
2=Viterbi + Reed-Solomon
3= Sequential
4= Sequential + Reed-Solomon
5=TCM (Trellis Code Modulation)
6=TCM + Reed-Solomon
7=TPC (aka Turbo) (Requires Codec, FAST)
8=None (uncoded) with differential encoding OFF
9=LDPC (Requires Codec, FAST)
A=VersaFEC CCM or ACM (Fixed in IP-ACM)
B=VersaFEC ULL
Example: RFT=1 (selects Viterbi only)
RFT=
RFT?
RFT*
RFT#
RFT?
RFT=x
(see Description of
Arguments)
Rx Demod
Type
RMD=
1 byte, value
of 0 to 5
Command or Query (Query only in IP-ACM).
Rx Demodulation in the form x, where:
0=BPSK
1=QPSK
2=OQPSK
3=8-PSK (FAST option)
4=16-QAM (Turbo or Viterbi + RS only)(FAST option)
5=8-QAM (TPC/LDPC only) (Needs Codec + FAST option)
6=Reserved
7=Reserved
8=Reserved
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=x
(see Description of
Arguments)