Comtech EF Data CDM-550T - Manual (Page 136)

CDM-550T Satellite Modem Revision 3
Remote Control MN/CDM550T.IOM
15.6.4 Remote Queries
Parameter
Type
Command
(Instruction
Code and
qualifier)
Arguments for
Command or
Response to
Query
Description of arguments
(note that all arguments are ASCII numeric codes, that is,
ASCII codes between 48 and 57)
Response to Command
(target to controller)
Query
(Instruction
Code and
qualifier)
Response to
query
(target to
controller)
Remote
Eb/No N/A 4 bytes,
numerical
Query only. (AUPC feature)
Returns the value of Ebi/No of the remote demod, if Framing is
enabled.
Returns 99.9 if demod is unlocked.
Returns xx.x if Framing is not enabled.
Range: between 2 and 16dB. Resolution 0.2 dB.
Example: REB=12.4 (which is Eb/No = 12.4 dB)
For values > 16.0 dB, the reply will be REB=16.0 N/A REB? REB=xx.x
(see description
for details of
arguments)
Tx Power
level
Increase N/A 3 bytes,
numerical
Query only. (AUPC feature)
Returns the increase in Tx power level, in dB (from the nominal
setting) due to the action of AUPC.
Returns x.x if AUPC is not enabled.
Example: PLI=2.3 N/A PLI? PLI=x.x
(see
description for
details of
arguments)
Rx Eb/No N/A 4 bytes,
numerical Query only.
Unit returns the value of Eb/No, between 0 and 16dB.
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. N/A EBN? EBN=xx.x (see
description for
details of
arguments)
RX Coarse AGC N/A 2 bytes,
numerical Query only.
Unit returns the vaue of Coarse AGC setting, between 0 and 99
Example: AGC=76 N/A AGC? AGC=xx (see
description for
details of
arguments
Rx Freq
Offset N/A 5 bytes,
1st , + or -,
next 4 bytes
numerical Query only.
Unit returns the value of freq. offset of the carrier being
demodulated. Values range from ±0 to ± 30 kHz, 100 Hz
resolution.
Example: RFO=+02.3 (offset is +2.3 kHz) Returns 99999 if the
demod is unlocked. N/A RFO? RFO=nxx.x
(see description
for details of
arguments)
Buffer Fill State N/A 2 bytes,
numerical Query only.
Unit returns the value of the buffer fill state. Values range from 1
to 99% .
Example: BFS=33 (buffer fill state is 33%) Returns 00 if demod
unlocked. N/A BFS? BFS=xx (see
description for
details of
arguments)
Rx BER N/A 5 bytes Query only.
Unit returns the value of the estimated corrected BER in the
form a.b x 10exp-c. Fist and second bytes are value, 3rd and 4th
bytes are the exponent. Returns 99999 if demod is unlocked.
Example: BER=4.8E3 (BER is 4.8 x 10-3) N/A BER? BER=a.bEc
(see
description for
details of
arguments)
15–20