Comtech EF Data CDM-570 Installation And Operation Manual page 365

CDM-570/570L Satellite Modem with Optional IP Module
Appendix D
Command
Parameter (Instruction
Type Code and
Qualifier)
Rx FEC Code RCR= 1 byte,
Rate value of 0 thru 7
Rx Data Rate RDR= 8 bytes
Rx BER N/A 5 bytes
Rx E /N N/A 4 bytes
b 0
Arguments for
Command or
Response to
Query
Command or Query.
Rx FEC Code Rate, where:
0 = Rate 5/16 (Turbo Only)
1 = Rate 21/44 (Turbo Only)
2 = Rate 1/2
3 = Rate 2/3 (8-PSK TCM or 8-QAM only)
4 = Rate 3/4
5 = Rate 7/8
6 = Rate 0.95 (Turbo Only)
7 = Rate 1/1 (Uncoded or No FEC)
Depending on FEC and demodulation type, not all of these selections will be
valid.
Example: RCR=1 (selects Rate 3/4)
Command or Query.
Rx Data Rate, in kbps, between 2.4 kbps to 9.98 Mbps.
Resolution=1 bps
Example: RDR=2047.999
Query only.
Value of the estimated corrected BER is returned in the form a.b x 10
a.b = value, -c L= exponent.
Returns 99999 if the demodulator is unlocked.
Example: BER=4.8E3 (which is BER = 4.8 x 10
Query only.
The value of E /N , between 0 and 16 dB, is returned.
b 0
Resolution 0.1 dB.
Returns 99.9 if demod is unlocked.
For values greater than 16.0 dB, the reply will be: EBN=+016
Example: EBN=12.3 (E
Description of Arguments
)
-3
/N = 12.3 dB)
b 0
D–15
Response to
(Instruction Code
Command
and Qualifier)
RCR= RCR?
RCR?
RCR*
RCR#
RCR+
RDR= RDR?
RDR?
RDR*
RDR#
N/A BER?
-c where:
N/A EBN?
Revision 12
MN/CDM570L.IOM
Query
Response to
Query
RCR=x
(see Description
of Arguments)
RDR=xxxx.xxx
(see Description
of Arguments)
BER=a.bEc
(see description
of arguments)
EBN=xxxx
(see Description of
Arguments)