Transmit (Tx) Commands And Queries - Comtech EF Data CDM-570 Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Appendix D
D.6.1

Transmit (Tx) Commands and Queries

Tx Priority System = ITF (Highest priority), FRM, TFT, TMD, TCR, and TDR (Lowest Priority), indicated by shading. Any change to
a higher priority parameter can override any of the parameters of lower priority.
Command Arguments for
Parameter (Instruction
Type Code and
Qualifier)
Unit ITF= 1 byte,
Interface Type value of 0 thru 8
Unit Framing FRM= 1 byte,
Mode value of 0 or 1
Tx FEC Type TFT= 1 byte,
value of 0 thru 6
Command or
Response to
Query
Command or Query.
Terrestrial interface type, where:
0=EIA-422/EIA530 DCE
1=V.35 DCE
2=EIA-232 (sync).
3= G.703 T1 AMI (forces Rx and Tx data rates to 1544 kbps)
4= G.703 T1 B8ZS (forces Rx and Tx data rates to 1544 kbps)
5= G.703 E1 Unbal AMI (forces Rx and Tx rates to 2048 kbps)
6= G.703 E1 Unbal HDB3 (forces Rx and Tx rates to 2048 kbps)
7= G.703 E1 Bal AMI (forces Rx and Tx rates to 2048 kbps)
8= G.703 E1 Bal HDB3 (forces Rx and Tx rates to 2048 kbps)
9 = IP Interface
Example: ITF=2 (V.35)
Note: When ITF is set to be G.703, Clock Extension Mode is automatically set to be
0=None. Reply: ITF+
Command or Query.
Unit operating mode, where:
0=Unframed
1= EDMAC Framing
2= EDMAC-2 Framing
Example: FRM=1 (which is framed)
Command or Query.
Tx FEC coding type, where:
0=None (uncoded - no FEC) (Forces TCR=7 1/1) with differential encoding ON
1=Viterbi
2=Viterbi + Reed-Solomon
3=Reserved – do not use
4= Reserved – do not use
5=TCM + Reed-Solomon (Forces TCR=3 2/3)
6=Turbo
Example: TFT=1 (which is Viterbi coding)
Description of Arguments
D–9
Revision 12
MN/CDM570L.IOM
Query
Response to
(Instruction Code
Command
and Qualifier)
ITF= ITF? ITF =x
ITF? (see Description
ITF* of Arguments)
ITF#
ITF+
FRM= FRM? FRM=x
FRM? (see Description
FRM* of Arguments)
FRM#
FRM+
TFT= TFT? TFT=x
TFT? (see Description
TFT* of Arguments)
TFT#
TFT+
Response to
Query