Table of Contents
Advertisement
8.5.7
Modem Performance Information
Command
Number of
Parameter
(Instruction
Arguments
& Qualifier)
Rx Signal
N/A
5 bytes
Level
Rx Frequency
N/A
6 bytes
Offset
Buffer Fill
N/A
2 bytes,
State
numeric
Rx BER
N/A
5 bytes
Rx Eb/No
N/A
4 bytes
Redundancy
N/A
1 byte,
State
0 or 1
Serial Remote Control
Description of Arguments
Query Only.
Returns the value of the Rx signal level in the form xxxxx, where:
xxxxx=Value, in dBm, from -20 thru -90.
NOTE:
If >-20 dBm, returns RSL=GT-20 (GT='greater than')
If <-90 dBm, returns RSL=LT-90 (LT='less than')
If in the range of -20 thru -90dBm, returns RSL=-xx.y (resolution=0.5dB)
EXAMPLE: <0/RSL? >0/RSL=-45.5 (indicates -45.5 dBm)
Query only.
Returns the value of the measured frequency offset of the carrier being demodulated, in the form sxxx.x,
where:
s=sign (+ or –)
xxx.x=Value, in kHz, from ± 0 thru ± 200.
Resolution=100 Hz
NOTES:
1) Returns 999999 if the demodulator is unlocked.
2) The maximum Rx Frequency Offset corresponds to the Receive Sweep Width (RSW)
EXAMPLE: <0/RFO? >0/RFO=+002.3 (indicates +2.3 kHz)
Query only.
Returns the value of the buffer fill state in the for xx, where:
xx=Percentage value from 01 to 99
NOTE: Returns 00 if demodulator is unlocked.
EXAMPLE: <0/BFS? >0/BFS=33 (indicates 33%)
Query only.
Returns the value of the estimated corrected BER in the form x.xEc, where:
x.x=Value
Ec=Exponent
NOTE: Returns 99999 if the demodulator is unlocked or BER data is unavailable.
EXAMPLE: <0/BER? >0/BER=4.8E3 (indicates BER @ 4.8 x 10
Query only.
Returns the value of Eb/No in the form xx.x, where:
xx.x=Value, in dB, from 00 or 16
Resolution=0.1 dB
NOTE: Returns 99.9 if demod is unlocked; returns +016 for values greater than 16.0 dB.
EXAMPLE: <0/EBN? >0/EBN=12.3 (indicates Eb/No @12.3 dB)
Query only.
Returns the redundancy state of the unit in the form x, where:
0=Offline
1=Online
EXAMPLE: <0/RED? >0/RED=1 (indicates redundancy state as Online)
)
-3
8–52
CDM-425 Advanced Satellite Modem
Revision 0
Query
Response to
(Instruction
Response to Query
Command
& Qualifier)
N/A
RSL?
RSL=xxxxx
(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=x.xEc
(See Description of
Arguments)
N/A
EBN?
EBN=xxxx
(see Description of
Arguments)
N/A
RED?
RED=x
(See Description of
Arguments)
MN-CDM-425
Advertisement
Table of Contents
