Comtech EF Data CDM-570 - Manual (Page 359)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Appendix D MN/CDM570L.IOM
D–9
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.
Parameter
Type
Command
(Instruction
Code and
Qualifier)
Arguments for
Command or
Response to
Query
Description of Arguments
Response to
Command
Query
(Instruction Code
and Qualifier)
Response to
Query
Unit
Interface Type ITF= 1 byte,
value of 0 thru 8 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+ ITF=
ITF?
ITF*
ITF#
ITF+ ITF? ITF =x
(see Description
of Arguments)
Unit Framing
Mode FRM= 1 byte,
value of 0 or 1 Command or Query.
Unit operating mode, where:
0=Unframed
1= EDMAC Framing
2= EDMAC-2 Framing
Example: FRM=1 (which is framed) FRM=
FRM?
FRM*
FRM#
FRM+ FRM? FRM=x
(see Description
of Arguments)
Tx FEC Type TFT= 1 byte,
value of 0 thru 6 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) TFT=
TFT?
TFT*
TFT#
TFT+ TFT? TFT=x
(see Description
of Arguments)