Comtech EF Data CDM-625A, Installation And Operation Manual

Page: 370 / 756

CDM-625A Advanced Satellite Modem MN-CDM625A
Serial-based Remote Product Management Revision 4
8–56
Parameter
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: <0/CRM? >0/CRM=+02 (interferer > desired) (format=sdd)
EXAMPLE 2: <0/CRM? >0/CRM=LT11 (less than -11 dB)
EXAMPLE 3: <0/CRM? >0/CRM=GT11 (greater than +11 dB)
EXAMPLE 4: <0/CRM? >0/CRM=99.9 (not locked or CnC not enabled)
EXAMPLE 5 : <0/CRM? >0/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: <0/CDM? >0/CDM=229500 (229.5 ms)
EXAMPLE 2: <0/CDM? >0/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: <0/CFM? >0/CFM=+001.0 (1 kHz)
EXAMPLE 2: <0/CFM? >0/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: <0/CPR? >0/CPR=+02.8 (interferer > desired) (format=sdd.d)
EXAMPLE 2: <0/CPR? >0/CPR=LT11.0 (less than -11.0 dB)
EXAMPLE 3: <0/CPR? >0/CPR=GT19.0 (greater than +19.0 dB)
EXAMPLE 4: <0/CPR? >0/CPR=9999.9 (not locked or CnC not enabled)
EXAMPLE 5 : <0/CPR? >0/CPR=AUTO (in CnC-APC mode)
N/A CPR? CPR=xxxxxx
(see Description of
Arguments)
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: <0/PSD? >0/PSD=+02.8 (interferer > desired) (format=sdd.d)
EXAMPLE 2: <0/PSD? >0/PSD=999.9 (not locked or CnC not enabled)
EXAMPLE 3 : <0/PSD? >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.
Returns the value of CnC-APC BER in the form xEc, where:
x=value
Ec=Exponent
BER is measured in frame UW.
EXAMPLE: <0/ABE? >0/ABE=8E5 (indicates CnC-APC BER @ 8 x 10
-5
)
NOTE: Returns 9999 if modem is not in CnC-APC mode or there is an APC frame sync error.
N/A ABE? ABE=xEc