Comtech EF Data CDM-750, Installation And Operation Manual

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CDM-750 Advanced High-Speed Trunking Modem Revision 2
Serial-based Remote Product Management MN-CDM750
7–11
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to Query
Tx
Symbol Rate
TSR= 10 bytes,
numeric
Command or Query.
Set or return Tx Symbol Rate, in Ksps, in the form dddddd.ddd where the valid range is:
QPSK/8PSK: 1000 to 63000Ksps
16APSK: 1000 to 47000Ksps
32APSK: 1000 to 38000Ksps
* All 9/10 MODCODs are not valid in Short Block operation
NOTE: If the Symbol Rate is set, then the Data Rate rate will be automatically calculated and updated.
TSR?
TSR=
TSR*
TSR#
TSR? TSR=xxxxxx.xxx
(see Description of
Arguments)
Tx Data Rate TDR= 10 bytes Command or Query.
Set or return Tx Data rate in Ksps, Resolution=1 bps in the form xxxxxx.xxx.
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.
The Data Rate can only be changed in Non-MultiStream Mode and only with the Ethernet interface selected.
Example: TDR=002047.999 (2047.999 kbps)
TDR=
TDR?
TDR*
TDR#
TDR? TDR=xxxxxx.xxx
(see Description of
Arguments)
Tx Spectrum
Invert
TSI= 1 byte, valuwe
of 0 or 1
Command or Query.
Set or return Tx Spectrum Invert in the form x, where:
0 = Normal
1 = Tx Spectrum Inverted
Example: TSI=0 (selects Normal)
TSI=
TSI?
TSI*
TSI#
TSI? TSI=x
(see Description of
Arguments)
Tx Alpha
Rolloff
TAR= 1 byte, value
of 0 thru 2
Command or Query.
Set or return Tx Alpha Rolloff, where:
0 = 20%
1 = 25%
2 = 35%
Example: TAR=0 (selects a Tx Alpha Rolloff of 20%)
TAR=
TAR?
TAR*
TAR#
TAR? TAR=x
Tx Gold Code
Sequence
Index
TGS= 6 bytes Command or Query.
Set or return Tx Gold Code Sequence Index in the form xxxxxx, where:
Gold Code Sequence index = 000000 to 262141
Example: TGS=189063
TGS=
TGS?
TGS*
TGS#
TGS? TGS=xxxxxx