Comtech EF Data CDM-570A - Manual (Page 288)

CDM-570A/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Serial-based Remote Product Management Revision 2
8–48
Parameter
Type
Command
(Instruction
Code and
Qualifier)
Arguments for
Command or
Response to
Query
Description of Arguments
Response to
Command
Query
(Instruction Code
and Qualifier)
Response to
Query
CnC
Freq Offset
Monitor
N/A 6 bytes Query only.
Valid only in CDM-570A Compatible Mode (CMO=1).
Calculates an estimated frequency offset, in kHz, between the interferer and the
desired power when CnC is enabled.
Examples: <0/CFM?
1) >0/CFM=+001.0 (1 kHz)
2) >0/CFM=9999.9 (not locked or CnC not enabled)
N/A CFF? CFF=xxxxxx
(see Description of
Arguments)
CnC Power
Ratio Monitor
N/A 6 bytes Query only.
Valid only in CDM-570A Compatible Mode (CMO=1).
When CnC is enabled and the modem is locked, ratio (in dB) between the
interferer and the desired power is monitored, with 0.1dB resolution.
Examples: <0/CPR?
1) >0/CPR=+02.8 (interferer>desired) (format = sdd.d)
2) >0/CPR=LT11.0 (less than –11.0 dB)
3) >0/CPR=GT19.0 (greater than +19.0 dB)
4) >0/CPR=9999.9 (not locked or CnC not enabled)
5) >0/CPR=AUTO (in CnC-APC mode)
N/A CPR? CPR=xxxxxx
(see Description of
Arguments)
CnC PSDR N/A 5 bytes Query only.
Valid only in CDM-570A Compatible Mode (CMO=1).
When CnC is enabled and the modem is locked, ratio (in dB) between the
interferer and the desired power is monitored, with 0.1 dB resolution.
Examples: <0/PSD?
1) >0/PSD=+02.8 (interferer>desired) (format = sdd.d)
2) >0/PSD=999.9 (not locked or CnC not enabled)
3) >0/PSD=AUTO (in CnC-APC mode)
N/A PSD? PSD=xxxxx
(see Description of
Arguments)
CnC-APC Bit
Error Rate
N/A 4 bytes Query only.
Valid only in CDM-570A Compatible Mode (CMO=1).
Returns the value of CnC-APC BER in the form xE -c , where:
x = value
E -c = Exponent.
Returns 9999 if unit is not in CnC-APC mode or if there is an APC frame sync
error.
BER is measured in frame UW.
Example: <0/ABE?
>0/ABE=8E-5
N/A ABE? ABE= xE -c
(see Description of
Arguments)
CnC-APC BER
Reset
ABR= None Command only.
Valid only in CDM-570A Compatible Mode (CMO=1).
This command takes no arguments.
Restarts CnC-APC BER measurement.
ABR= N/A N/A