Comtech EF Data CDM-625, Инструкция по установке и эксплуатации

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CDM-625 Advanced Satellite Modem Revision 1
Remote Control MN-0000036 (Ref MN/CDM625.IOM)
D.7.6 Modem Performance Information
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to Query
Rx Signal
Level N/A 5 bytes Query Only.
Unit returns the value of the Rx signal level, in dBm, between –20
and –90 dBm.
If >-20dBm, returns RSL=GT-20 (GT = ‘greater than’)
If <-90 dBm, returns RSL=LT-90 (LT = ‘less than’)
If in the range of –20 to –90dBm,
returns RSL=-xx.y (resolution 0.5dB)
Example: RSL=-45.5 (indicating –45.5 dBm)
N/A RSL? RSL=xxxxx
(see description
of arguments)
Rx Frequency
Offset N/A 6 bytes
Exception:
600/L
5 bytes Query only.
Unit returns the value of the measured frequency offset of the
carrier being demodulated.
Values range from
±
0 to
±
200 kHz, 100 Hz resolution.
Returns 999999 if the demodulator is unlocked.
The maximum Rx Frequency Offset corresponds to the Receive
Sweep Width (RSW)
Example: RFO=+002.3 (which is + 2.3 kHz)
N/A RFO? RFO=sxxx.x
(see description
of arguments)
Buffer Fill
State N/A 2 bytes Query only.
Unit returns the value of the buffer fill state, between 1 and 99%.
Returns 00 if demodulator is unlocked.
Example: BFS=33 (which is 33%)
N/A BFS? BFS=xx
(see description
of arguments)
Rx BER N/A 5 bytes Query only.
Units returns the value of the estimated corrected BER in the form
a.bx10
-3
. First three bytes are the value. Last two bytes are the
exponent. Returns 99999 if the demodulator is unlocked or BER
data is unavailable.
Example: BER=4.8E3 (which is BER=4.8 x 10
-3
)
N/A BER? BER=xxxxx
(see description
of arguments)
D–49