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CDM-500 Closed Network Satellite Modem
Parameter
Command
Arguments
Type
(Instruction
for Command
Code and
or Response to
qualifier)
Query
Retrieve next
N/A
75 bytes
5 unread
Stored Events
Retrieve
N/A
2 bytes,
Number of
numerical
unread Stored
Events
Rx Eb/No
N/A
4 bytes,
numerical
Rx Freq
N/A
5 bytes, 1st , +
Offset
or -, next
4bytes
numerical
Rev. 1.3
Description of arguments
(note that all arguments are ASCII numeric codes,
that is, ASCII codes between 48 and 57)
Query only
Unit returns the oldest 5 Stored Events 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= ABCmmddyyhhmmss,
A being the fault/clear indicator.
F=Fault
C=Clear
I=Info
B being the fault type where:
1=Unit
2=Rx Traffic
3=Tx Traffic
4=Power on/off, or log cleared
and C being the fault code, as defined under the 'FLT'
message table entry, except Info codes, which are:
0=power off, 1=power on, 2=log cleared, 3=global
config change, and 4= redundancy config change. If
there are no new events, the unit replies with RNE? If
there are less than 5 events to be retrieved, the
remaining positions are padded with zeros.
Query only.
Unit returns the number of Stored Events which
remain unread, in the form xx. 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: NUE=98
Query only.
Unit returns the value of Ebi/No, between 2 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=+16.
Query only.
Unit returns the value of freq. offset of the carrier
being demodulated. Values range from ±0 to ± 30
description for kHz, 100 Hz resolution.Example:
RFO=+023 (offset is +2.3 kHz) Returns 9999 if
demod unlocked.
Response to
Query
Command (target to
(Instruction
controller)
Code and
qualifier)
N/A
RNE?
N/A
NUE?
N/A
EBN?
N/A
RFO?
Remote Control
Response to
query (target
to controller)
RNE={CR}AB
C
mmddyyhhm
mss{CR}ABCm
mddyyhhmms
s{CR}ABCmm
ddyyhhmmss{
CR}ABCmmdd
yyhhmmss{CR
}ABCmmddyy
hhmmss
(see description
for details of
arguments)
NUE=xx
(see description
for details of
arguments)
EBN=xx.x
(see description
for details of
arguments)
RFO=nxx.x
(see details of
arguments)
B–15
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