Comtech EF Data CDM-600 Operating Instructions Manual page 170

CDM-600 Satellite Modem
Remote Control
Exception: Select DROP or D&I++ mode using TFM (Transmit Framing type) which is highest priority
Command
Arguments
Parameter (Instruction for Command
Code and or Response
Type
to Query
Qualifier)
Tx FEC Type TFT= 1 byte, value
of 0 thru 9
Tx TMD= 1 byte, value
Modulation of 0 thru 5
Type
Description of Arguments
Command or Query.
Tx FEC coding type, where:
0=None (uncoded, rate 1/1) with differential encoding
ON
1=Viterbi
2=Viterbi + Reed-Solomon
3=Sequential
4=Sequential + Reed-Solomon
5=TCM (Trellis Code Modulation) (Forces TCR=3
6=TCM + Reed-Solomon (Forces TCR=3
7=Turbo (TPC)
8=None (uncoded, rate 1/1) with differential encoding
OFF
9=LDPC (Requires TPC/LDPC Codec)
Example: TFT=1 (which is Viterbi coding)
Command or Query.
Tx Modulation type, where:
0=BPSK
1=QPSK
2=OQPSK
3=8-PSK
4=16-QAM (Turbo or Viterbi + RS only)
5=8-QAM (LDPC only) (Requires TPC/LDPC Codec and
FAST option.)
Depending on FEC type, not all of these selections will
be valid.
Example: TMD=2 (which is OQPSK)
16–8
Query
Response
(Instruction
to
Code and
Command
Qualifier)
TFT= TFT?
TFT?
TFT*
TFT#
2/3)
2/3)
TMD= TMD?
TMD?
TMD*
TMD#
Revision 7
MN/CDM600.IOM
Response to Query
TFT=x
(see description of
arguments)
TMD=x
(see description of
arguments)