Comtech EF Data CDM-570L Installation And Operation Manual page 256

CDM-570/570L Satellite Modem with Optional IP Module
Serial Remote Control
Command Arguments
Parameter (Instruction for Command
Type Code and or Response
Qualifier)
Initialize ISP= None
Statistics
Pointer
Rx Eb/No N/A 4 bytes
Rx Signal N/A 4 bytes
Level
Rx Frequency N/A 6 bytes
Offset
Buffer Fill N/A 2 bytes
State
Description of Arguments
to Query
Command only.
Resets internal pointer to allow RNS? queries to start at the
beginning of the statistics log.
Query only.
Unit returns the value of Eb/No, between 0 and 16 dB,
Resolution 0.1 dB.
Returns 99.9 if demod is unlocked.
Example EBN=12.3 (which is Eb/No = 12.3 dB)
For values greater than 16.0 dB, the reply will be: EBN=+016
Query Only.
Unit returns the value of the Rx signal level, in dBm, between –5
and –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:
RSL=LT99 (Rx signal level is less than -99 dBm)
RSL===41 (Rx signal level is equal to -41 dBm)
Query only.
Unit returns the value of the measured frequency offset of the
carrier being demodulated, in the form sxxx.x, where:
s = sign (+ or - character)
xxx.x = value (range from ± 0 to ± 200 kHz, 100 Hz resolution)
Returns +999.9 if the demodulator is unlocked.
Example: RFO=+002.3 (which is + 2.3 kHz)
Query only.
Unit returns the value of the buffer fill state, between 1 to 99%.
Returns 00 if demodulator is unlocked.
Example: BFS=33 (which is 33%)
Response to
Command
ISP=
ISP#
N/A
N/A
N/A
N/A
13–22
Revision 4
MN/CDM570L.IOM
Query
(Instruction
Response to Query
Code and
Qualifier)
N/A N/A
EBN? EBN=xxxx
(see description of
arguments)
RSL? RSL=ccxx
(see description
of arguments)
RFO? RFO=sxxx.x
(see description
of arguments)
BFS? BFS=xx
(see description
of arguments)