Comtech EF Data CDM-625A - Page 334

CDM-625A Advanced Satellite Modem MN-CDM625A
Serial-based Remote Product Management Revision 4
8–20
Parameter
Command
(Instruction
& Qualifier)
Length of
Argument
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to Query
Rx FEC Type
RFT=
1 byte, 0 thru 9,
A thru D
Command or Query.
Sets or returns 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
C=VersaFEC-2 Long Block
D=VersaFEC-2 Short Block
EXAMPLE: <0/RFT=1 (selects Viterbi only)
RFT=
RFT?
RFT*
RFT#
RFT?
RFT=x
(see Description of
Arguments)
Rx Demod
Type
RMD=
1 byte, 0 thru 8
Command or Query (Query only in ACM).
Sets or returns 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=8-ARY (VersaFEC-2 only)
7=16-ARY (VersaFEC-2 only)
8=32-ARY (VersaFEC-2 only)
Depending on FEC type, not all of these selections will be valid. All other codes are invalid.
EXAMPLE: <0/RMD=2 (selects OQPSK)
RMD=
RMD?
RMD*
RMD#
RMD?
RMD=x
(see Description of
Arguments)
Rx FEC Code
Rate
RCR=
1 byte, 0 thru 7,
A thru Z, a thru
z, “, &, @, [, ], {, }
Command or Query (Query only in ACM).
Sets or returns Rx FEC Code Rate in the form x, where:
0=Rate 1/2
1=Rate 3/4
2=Rate 7/8
3=Rate 2/3 (8-PSK TCM or LDPC only)
4=Rate 1/1 (Uncoded or No FEC)
5=Rate 21/44 (Turbo Only)
6=Rate 5/16 (Turbo Only)
7=Rate 0.95 (Turbo Only) (aka 17/18)
8=Reserved
9=Reserved
A=VersaFEC CCM ModCod 0 – BPSK 0.488
B=VersaFEC CCM ModCod 1 – QPSK 0.533
C=VersaFEC CCM ModCod 2 – QPSK 0.631
D=VersaFEC CCM ModCod 3 – QPSK 0.706
RCR=
RCR?
RCR*
RCR#
RCR?
RCR=x
(see Description of
Arguments)