Comtech EF Data CDM-740, Installation And Operation Manual

Page: 121 / 150

CDM-740 Advanced Satellite Modem Revision 0
Remote Control MN-CDM740
A–7
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction
& Qualifier)
Response to Query
Tx FEC Code
Rate TCR=
1 byte, value of
0 thru 4
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)
TCR=
TCR?
TCR*
TCR#
TCR?
TCR=x
(see Description of
Arguments)
Tx Data Rate TDR= 10 bytes
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)
TDR=
TDR?
TDR*
TDR# TDR? TDR=xxxxxx.xxx
(see Description of
Arguments)
Tx
Symbol Rate N/A 10 bytes,
numeric Query only.
Tx Symbol Rate in the form dddddd.ddd where:
ddddd.ddd = Tx Symbol Rate in ksps
TSR?
TSR=
TSR*
TSR# TSR? TSR=dddddd.ddd
(see Description of
Arguments)
Tx Frequency TFQ= 9 bytes
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
TFQ=
TFQ?
TFQ*
TFQ# TFQ? TFQ=xxxx.xxxx
Tx LO TLO= 6 bytes
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
TLO=
TLO?
TLO*
TLO# TLO? TLO=xxxxxs (see
Descriptions of
Arguments)