Comtech EF Data CDM-550T Manual page 133

CDM-550T Satellite Modem
Parameter Command
Type (InstructionC
ode and
qualifier)
Retrieve next 5 N/A
unread Stored
Statistics
Retrieve Number N/A
of unread Stored
Statistics
Rx Eb/No N/A
RX Coarse AGC N/A
Rx Freq N/A
Offset
Buffer Fill State N/A
Rev. 1.3
Arguments for Description of arguments
Command or (note that all arguments are ASCII numeric codes, that is,
Response to ASCII codes between 48 and 57)
Query
130 bytes Query only
Unit returns the oldest 5 Stored Statistics which have not yet
been read over the remote control. Reply format:
{CR}Sub-body{CR}Sub-body{CR}Sub-body{CR}Sub-
body{CR}Sub-body, where Sub-body=
AA.ABB.BC.CD.Dddmmyyhhmmss,
AA.A = Minimum Eb/No during sample period.
BB.B = Average Eb/No during sample period.
C.C = Max. Tx Power Level Increase during sample period.
D.D = Average Tx Power Level Increase during sample period.
ddmmyyhhmmss = date/time stamp.
If there are no new events, the unit replies with RNS? If there
are less than 5 statistics to be retrieved, the remaining positions
are padded with zeros.
3 bytes, Query only.
numerical Unit returns the number of Stored Statistics which remain
unread, in the form xxx. Note: This means unread over the
remote control - viewing the stored events from the front panel
of the modem does not affect this value. Example reply:
NUS=198
4 bytes, Query only.
numerical Unit returns the value of Ebi/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.
2 bytes, Query only.
numerical Unit returns the vaue of Coarse AGC setting, between 0 and 99
Example: AGC=76
5 bytes, Query only.
1st , + or -, Unit returns the value of freq. offset of the carrier being
next 4 bytes demodulated. Values range from ±0 to ± 30 kHz, 100 Hz
numerical resolution.Example: RFO=+02.3 (offset is +2.3 kHz) Returns
99999 if the demod is unlocked.
2 bytes, Query only.
numerical 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.
Response to Command Query
(target to controller) (Instruction
Code and
qualifier)
N/A RNS?
N/A NUS?
N/A EBN?
N/A AGC?
N/A RFO?
N/A BFS?
Remote Control
Response to query
(target to controller)
RNS={CR}AA.ABB.B
C.CD.Dddmmyyhhmm
ss{CR}AA.ABB.BC.C
D.Dddmmyyhhmmss{
CR}AA.ABB.BC.CD.
Dddmmyyhhmmss{CR
}AA.ABB.BC.CD.Ddd
mmyyhhmmss{CR}AA
.ABB.BC.CD.Dddmmy
yhhmmss (see
description for details
of arguments)
NUS=xxx (see
description for details
of arguments)
EBN=xx.x (see
description for details
of arguments)
AGC=xx (see
description for details
of arguments
RFO=nxx.x (see
description for details
of arguments)
BFS=xx (see
description for details
of arguments)
15–19