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CDM-500 Closed Network Satellite Modem
Parameter
Command
Arguments
Type
(Instruction
for Command
Code and
or Response to
qualifier)
Query
Config Store
CST=
1 byte,
numerical, 0 to
9
Config Load
CLD=
1 byte,
numerical, 0 to
9
Re-center
RCB=
None
Buffer
Force 1:1
FSW=
None
Switch
10dB
ATS=
1 byte, value of
attenuator set
0 or 1
Rev. 1.3
Description of arguments
(note that all arguments are ASCII numeric codes,
that is, ASCII codes between 48 and 57)
Forces the unit to store the current modem
configuration in Configuration Memory location
defined by the one byte argument (0 to 9).
Example CST=4 (Store current config in location 4)
WARNING: Use with caution! If the location already
contains data it will be automatically overwritten. If
in doubt, query the location first.
Command only.
Forces the unit to retrieve the Configuration Memory
location defined by the one byte argument (0 to 9)
and to re-program the unit with that stored
configuration.
Command only.
Forces the unit to re-center the receive
plesiochronous/doppler buffer. This command takes
no arguments.
Command only.
Forces the unit to toggle the Unit Fail relay to the
'fail' state for approx 500ms. If the unit is a 1:1 pair,
and it is currently the 'On Line' unit, this will force a
switchover, so the unit will then be in 'Standby'
mode. The command is always executed by the unit,
regardless of whether it is stand-alone, in a 1:1 pair,
or part of a 1:N system.
This command takes no arguments.
FACTORY USE ONLY
Modulator output 10dB attenuator setting, where
0 = no attenuation
1 = 10 dB attenuation
Example: ATS=0
(Used for power-level calibration)
Response to
Query
Command (target to
(Instruction
controller)
Code and
qualifier)
CST= (message ok)
CST?n where
CST? (received ok,
n is 0 to 9
but invalid arguments
CST?0, or
found)
CST?1, or
CST?2, or
CST?3, or
CST?4, or
CST?5, or
CST?6, or
CST?7, or
CST?8, or
CST?9
CLD= (message ok)
N/A
CLD? (message
received ok, but
either an invalid
argument was found,
or the requested
location does not
contain a valid
configuration)
RCB= (message ok)
N/A
FSW= (message ok)
N/A
ATS= (message ok)
ATS?
ATS? (received ok,
but invalid arguments
found) ATS*
(message ok, but not
permitted in current
mode
Remote Control
Response to
query (target
to controller)
Return the same
format as the
MGC with the
form: CST= for
a valid config,
and CST*
where no valid
config is found
in that n
N/A
N/A
N/A
ATS=n
where n is 0 or
1
B–13
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