Comtech EF Data CDM-425, Инструкция по установке и эксплуатации

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CDM-425 Advanced Satellite Modem
Revision 0
Serial Remote Control 8–55 MN-CDM-425
Parameter
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction
& Qualifier)
Response to Query
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
CnC-APC
BER Reset
ABR= None Command only.
This command takes no arguments. Forces restart of the CnC-APC BER measurement.
ABR= N/A N/A