Comtech EF Data CDM-710 Installation And Operation Manual page 203

CDM-710 Broadcast Satellite Modem
Appendix A
Command Arguments for
Parameter (Instruction Command or
Type Code and Response to
Qualifier) Query
Redundancy
RED= 1 byte
State
Rx Frequency
N/A 5 bytes
Offset
Rx Frequency
RFQ= 9 bytes
Rx Frame Size
N/A 1 byte
Rx FEC Type
N/A 1 byte
Rx Gold Code
RGS= 6 bytes
Sequence
Index
Description of Arguments
Command or Query.
Unit returns the redundancy state of the unit in the form x, where:
0 = Offline
1 = Online
Notes:
1. This command can be used to force the unit offline, this is done by sending
RED=0. This is only valid if redundancy mode is enabled – if redundancy is not
enabled, then RED=0 will return an error. The unit cannot be forced online.
2. If the unit is not in redundancy mode, then the unit will always be online.
Example: RED=0 (force unit offline)
Query only.
Unit returns the value of the measured frequency offset of the carrier being
demodulated in the form sxxx.x. Values range from ± 0 to ± 100 kHz, 100 Hz
resolution.
Returns 999999 if the demodulator is unlocked.
Example: RFO=+002.3 (which is + 2.3 kHz)
Command or Query.
Rx Frequency (in MHz) in the form xxxx.xxxx:
52 to 88 MHz, and 104 to 176 MHz (70/140 Modulator)
950 to 1950 MHz (L-Band Modulator)
Resolution=100Hz.
Example: RFQ=0950.0000
Query only.
Rx Frame Size Long/Short selection in the form x, where:
0=Short,
1=Long
Example: RFS =0 (which is Short Frame Size)
Note: Valid only in DVB-S2 mode. If the unit is not locked, the query returns 'x'.
Query only.
Rx FEC coding type in the form x, where:
0=Viterbi + Reed-Solomon
1=LDPC
Note: FEC is dependent on the RX Mode Type.
Example: RFT=1 (which is LDPC coding)
Command or Query.
Rx Gold Code Sequence Index:
xxxxxx = Gold Code Sequence index ( 0 to 262141 )
Example: RGS=189063
Note: Valid only in DVB-S2 mode.
A–29
MN/CDM710.IOM
Query
Response to (Instruction
Response to Query
Command Code and
Qualifier)
RED= RED? RED=x
RED? (See Description of
RED* Arguments)
RED#
RFO? RFO? RFO=sxxx.x
RFO*
RFO#
RFQ= RFQ? RFQ=xxxx.xxxx
RFQ?
RFQ*
RFQ#
RFS? RFS? RFS =x
RFS *
RFS #
RFT? RFT? RFT=x
RFT*
RFT#
RGS= RGS? RGS=xxxxxx
RGS?
RGS*
RGS#
Revision 11