Comtech EF Data CDM-740 Installation And Operation Manual page 121

CDM-740 Advanced Satellite Modem
Remote Control
Command
Parameter Number of
(Instruction
Type Arguments
& Qualifier)
Tx FEC Code TCR= 1 byte, value of
Rate 0 thru 4
Tx Data Rate TDR= 10 bytes
Tx N/A 10 bytes,
Symbol Rate numeric
Tx Frequency TFQ= 9 bytes
Tx LO TLO= 6 bytes
Description of Arguments
Command or Query.
Tx FEC Code Rate, where:
0=reserved
1=Rate 1/2
2=Rate 3/4
3=Rate 7/8
4=Rate 0.95
The following code rate/mod type combinations are supported:
Rate 1/2 BPSK/QPSK
Rate 3/4 QPSK/8-QAM/16-QAM
Rate 7/8 QPSK/8-QAM/16-QAM
Rate 0.95 QPSK/8-QAM
Example: TCR=3 (selects Rate 3/4)
Command or Query.
Tx Data Rate in the form dddddd.ddd where:
dddddd.ddd = Tx Data Rate in kbps, between 16 kbps and 9.98 Mbps
Resolution=1 bps
Example: TDR=002047.999 (sets TX Data Rate as 2047.999 kbps)
Query only.
Tx Symbol Rate in the form dddddd.ddd where:
ddddd.ddd = Tx Symbol Rate in ksps
Command or Query.
Frequency ranges:
50.0000 MHz to 180.0000 MHz and
950.0000 MHz to 2150.0000 MHz (L-band)
Resolution=100Hz.
Example: TFQ=0950.9872
Command or Query.
Tx LO frequency information in the form xxxxxs, where:
xxxxx = the LO frequency, 3000 through 65000 MHz, or
00000 = OFF
Note: Terminal Frequency = Tx LO _+/- Tx Frequency
A–7
Revision 0
MN-CDM740
Query
Response to
(Instruction Response to Query
Command
& Qualifier)
TCR= TCR? TCR=x
TCR? (see Description of
Arguments)
TCR*
TCR#
TDR= TDR? TDR=xxxxxx.xxx
TDR? (see Description of
Arguments)
TDR*
TDR#
TSR? TSR? TSR=dddddd.ddd
TSR= (see Description of
TSR* Arguments)
TSR#
TFQ= TFQ? TFQ=xxxx.xxxx
TFQ?
TFQ*
TFQ#
TLO= TLO? TLO=xxxxxs (see
Descriptions of
TLO?
Arguments)
TLO*
TLO#