Comtech EF Data CDM-625 - Page 524

CDM-625 Advanced Satellite Modem Revision 13
Appendix D MN-CDM625
D–54
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
CnC PSDR
N/A
5 bytes
Query only.
When CnC is enabled and the modem is locked, ratio (in dB) between the interferer and the desired power
is monitored. The precision is 0.1dB.
Example 1: PSD=+02.8 (interferer > desired) (format = sdd.d)
Example 2: PSD=999.9 (not locked or CnC not enabled)
Example 3: 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.
Unit returns the value of CnC-APC BER in the form ax10
-3
, where:
First byte is the value, last two bytes are the exponent.
Returns 9999 if modem is not in CnC-APC mode or there is an APC frame sync error.
BER is measured in frame UW.
Example: ABE=8E-5
N/A
ABE?
ABE=xxxx
CnC-APC BER
Reset
ABR=
None
Command only.
Restart CnC-APC BER measurement.
Note: This command takes no arguments.
ABR=
N/A
N/A
CnC-APC
Frame Error
Rate
N/A
4 bytes
Query only.
Unit returns the value of CnC-APC FER in the form ax10
-3
, where:
First byte is the value, last two bytes aret he exponent.
Returns 9999 if modem is not in CnC-APC mode or there is an APC frame sync error.
Example: Example: AFE=8E-2
N/A
AFE?
AFE=xxxx
CnC-APC FER
Reset
AFR=
None
Command only.
Restart CnC-APC FER measurement.
Note: This command takes no arguments.
AFR=
N/A
N/A
CnC-APC
Activate/Suspe
nd
APC=
1 byte, 0 thru 2
Command only.
Used to activate or suspend APC operation, in format APC=x, where:
0 = no action
1 = Activate APC
2 = Suspend APC
APC=
N/A
N/A