Tx Parameters - Comtech EF Data CDM-750 Installation And Operation Manual

CDM-750 Advanced High-Speed Trunking Modem
Appendix D
D.6.1

Tx Parameters

Command
Parameter Number of
(Instruction
Type Arguments
& Qualifier)
Tx Alpha
TAR= 1 byte
Rolloff
Tx Data Rate TDR= 10 bytes
Tx Framing TFM= 1 byte
Mode
Tx Frequency TFQ= 9 bytes
Tx Gold Code
TGS= 6 bytes
Sequence Index
Description of Arguments
Command or Query.
Tx Alpha Rolloff, in the form x, where:
0=20%
1=25%
2=35%
Example: TAR=0 (a Tx Alpha Rolloff of 20%)
Command or Query.
Sets Tx Data rate, in the form xxxxxx.xxx.
Ksps Resolution=1bps.
Note: If the Data Rate is set, then the Symbol Rate will be automatically calculated
and updated. The symbol rate will be limit checked to assure valid ranges.
Example: TDR=002047.999 (2047.999 kbps)
Command or Query.
Tx Framing mode, in the form x, where:
0= DVB-S2 Normal,
1=DVB-S2 Short Block
Note: When in ACM mode, Tx framing must be set to 0 (DVB-S2 Normal).
Example: TFM=0 (selects S2 Normal Block)
Command or Query.
Sets Tx Frequency range in the form xxxx.xxxx:
50 MHz to 180 MHz, and
950 MHz to 2150 MHz
Tx Frequency Resolution=100Hz.
Note: The CDM-750 supports 70/140 MHz band and L-Band.
Example: TFQ=0950.9872
Command or Query.
Tx Gold Code Sequence Index in the form xxxxxx, where:
xxxxxx=0 to 262141
Example: TGS=189063
D–7
Query
Response to
(Instruction & Response to Query
Command
Qualifier)
TAR=
TAR? TAR=x
TAR?
TAR*
TAR#
TDR= TDR? TDR=xxxxxx.xxx
TDR? (see Description of
Arguments)
TDR*
TDR#
TFM= TFM? TFM=x
TFM? (see Description of
Arguments)
TFM*
TFM#
TFQ= TFQ? TFQ=xxxx.xxxx
TFQ?
TFQ*
TFQ#
TGS=
TGS? TGS=xxxxxx
TGS?
TGS*
TGS#
Revision 1
MN-CDM750