Comtech EF Data CDM-625 - Page 523

CDM-625 Advanced Satellite Modem Revision 13
Appendix D MN-CDM625
D–53
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
…Faults and
Status (cont.)
4 = BUC no comms/bad checksum
5 = BUC PLL
6 = BUC temperature
h= LNB status/faults:
0 = OK, masked, or not present
1 = LNB current
2 = LNB voltage
xx = spares
CnC
Ratio Monitor
N/A
4 bytes
Query only.
When CnC is enabled and the modem is locked, ratio (in dB) is monitored between the interferer and the
desired power.
Example 1: CRM=+02 (interferer > desired) (format = sdd)
Example 2: CRM=LT11 (less than –11 dB)
Example 3: CRM=GT11 (greater than +11 dB)
Example 4: CRM=99.9 (not locked or CnC not enabled)
Example 5: CRM=AUTO (in CnC-APC mode)
N/A
CRM?
CRM=xxxx
(see Description of
Arguments)
CnC
Delay Monitor
N/A
6 bytes
Query only.
When CnC is enabled and the modem is locked, delay (in microseconds) of the interferer is monitored.
Example 1: CDM=229500 (229.5 ms)
Example 2: CDM=999999 (not locked or CnC not enabled)
N/A
CDM?
CDM=xxxxxx
(see Description of
Arguments)
CnC
Freq Offset
Monitor
N/A
6 bytes
Query only.
When CnC is enabled, an estimated frequency offset (in kHz) is calculated between the interferer and the
desired power.
Example 1: CFM=+001.0 (1 kHz)
Example 2: CFM=9999.9 (not locked or CnC not enabled)
N/A
CFM?
CFM=xxxx.x
(see Description of
Arguments)
CnC Power
Ratio Monitor
N/A
6 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: CPR=+02.8 (interferer > desired) (format = sdd.d)
Example 2: CPR=LT11.0 (less than –11.0 dB)
Example 3: CPR=GT19.0 (greater than +19.0 dB)
Example 4: CPR=9999.9 (not locked or CnC not enabled)
Example 5: CPR=AUTO (in CnC-APC mode)
N/A
CPR?
CPR=xxxxxx
(see Description of
Arguments)