Comtech EF Data CDM-550T, Manual

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CDM-550T Satellite Modem Remote Control
Rev. 1.3 15–19
Parameter
Type Command
(InstructionC
ode 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)
Retrieve next 5
unread Stored
Statistics N/A 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.
N/A RNS? 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)
Retrieve Number
of unread Stored
Statistics N/A 3 bytes,
numerical
Query only.
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
N/A NUS? NUS=xxx (see
description for details
of arguments)
Rx Eb/No N/A 4 bytes,
numerical Query only.
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. 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)