Comtech EF Data CDM-740 - Manual (Page 120)

CDM-740 Advanced Satellite Modem Revision 0
Remote Control MN-CDM740
A–6
A.5.1 Tx Parameters
Priority System: TIT (Highest priority), TFT, TMD, TCR, TDR, and TSR (Lowest Priority), indicated by shading.
Any change to a higher priority parameter can override any of the parameters of lower priority.
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction
& Qualifier)
Response to Query
Tx Interface
Type TIT= 1 byte, value of
0 thru 9, or A Command or Query.
Tx Interface Type, where:
0 = IP
1 = Reserved
Example: TIT=1 (selects IP)
TIT=
TIT?
TIT*
TIT# TIT? TIT=x
(see Description of
Arguments)
Tx FEC Type TFT= 1 byte, value of
0 thru xx Command or Query.
Tx FEC coding type, where:
0=TPC (aka Turbo)
Example: TFT=0 (selects Turbo)
TFT=
TFT?
TFT*
TFT# TFT? TFT=x
(see Description of
Arguments)
Tx Modulation
Type TMD= 1 byte, value of
0 thru 3 Command or Query.
Tx Modulation type, where:
0=reserved
1=QPSK
2=8-QAM
3=16-QAM
Depending on FEC type, not all of these selections will be valid.
The following code rate/mod type combinations are supported:
Rate 1/2 QPSK
Rate 3/4 QPSK/8-QAM/16-QAM
Rate 7/8 QPSK/8-QAM/16-QAM
Rate 0.95 QPSK/8-QAM
Example: TMD=3 (selects 8-QAM)
TMD=
TMD?
TMD*
TMD# TMD? TMD=x
(see Description of
Arguments)