Comtech EF Data CDM-425 Installation And Operation Manual page 379

Command
Number of
Parameter (Instruction
Arguments
& Qualifier)
CnC N/A 4 bytes
Ratio Monitor
CnC N/A 6 bytes
Delay Monitor
CnC N/A 6 bytes
Freq Offset
Monitor
CnC Power N/A 6 bytes
Ratio Monitor
CnC PSDR N/A 5 bytes
CnC-APC Bit N/A 4 bytes
Error Rate
CnC-APC ABR= None
BER Reset
Serial Remote Control
Description of Arguments
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)
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)
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)
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)
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)
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
NOTE: Returns 9999 if modem is not in CnC-APC mode or there is an APC frame sync error.
Command only.
This command takes no arguments. Forces restart of the CnC-APC BER measurement.
)
-5
8–55
CDM-425 Advanced Satellite Modem
Revision 0
Query
Response to
(Instruction Response to Query
Command
& Qualifier)
N/A CRM? CRM=xxxx
(see Description of
Arguments)
N/A CDM? CDM=xxxxxx
(see Description of
Arguments)
N/A CFM? CFM=xxxx.x
(see Description of
Arguments)
N/A CPR? CPR=xxxxxx
(see Description of
Arguments)
N/A PSD? PSD=xxxxx
(see Description of
Arguments)
N/A ABE? ABE=xEc
ABR= N/A N/A
MN-CDM-425