Modem Performance Information - Comtech EF Data CDM-570A Installation And Operation Manual

8.5.7

Modem Performance Information

Command
Parameter (Instruction
Type Code and
Qualifier)
Rx Signal Level N/A 4 bytes
Rx Frequency N/A 6 bytes
Offset
Buffer Fill N/A 2 bytes
State
Rx BER N/A 5 bytes
Serial-based Remote Product Management
Arguments for
Command or
Response to
Query
Query Only.
Returns the value of the Rx signal level, in dBm, from –5 to –99 dBm, in the form
ccxx, where:
cc = code (GT= greater than; LT = less than, == is 'equal to')
xx = value (the '-' sign is implied)
Examples: <0/RSL?
1) >0/RSL=LT99 (Rx signal level is less than -99 dBm)
2) >0/RSL===41 (Rx signal level is equal to -41 dBm)
Query only.
Returns the value of the measured frequency offset of the carrier being
demodulated, range from ±0 to ±32 kHz, in the form sxxx.x, where:
s = sign (+ or –)
xxx.x = value
Resolution = 100 Hz
Unit returns +999.9 if the demodulator is unlocked.
Note: The maximum Rx Frequency Offset corresponds to the Receive Sweep
Width (RSW)
Example: <0/RFO?
>0/RFO=+002.3 (+2.3 kHz)
Query only.
Unit returns the value of the buffer fill state, from 1 to 99%. Returns 00 if
demodulator is unlocked.
Example: <0/BFS?
>0/BFS=33 (33%)
Query only.
Returns the value of the estimated corrected BER in the form a.bE
a.b = value
E -c = exponent.
Returns 99999 if the demodulator is unlocked.
Example: <0/BER?
>0/BER=4.8E3 (BER = 4.8 x 10
CDM-570A/570AL Satellite Modem with Optional Packet Processor
Description of Arguments
-c where:
)
-3
8–49
Revision 5
Query
Response to
(Instruction Code
Command
and Qualifier)
N/A RSL? RSL=ccxx
(see description
of arguments)
N/A RFO? RFO=sxxx.x
(See Description of
Arguments)
N/A BFS? BFS=xx
(See Description of
Arguments)
N/A BER? BER=a.bEc
(see description
of arguments)
MN-CDM570A
Response to
Query