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Remote Control
Parameter
Command
Arguments
Type
(Instruction
for Command
Code and
or Response to
qualifier)
Query
Tx Scrambler
TSC=
1 byte, value of
0 or 1
Tx Power
TPL=
4 bytes
Level
Tx Clock
TCK=
1 byte, value of
Source
1,2 or 3
Tx Carrier
TXO=
1 byte, value of
On/Off State
0, 1 or 2
Rx Frequency
RFQ=
8 bytes
Rx Data Rate
RDR=
7 bytes
B–8
Description of arguments
(note that all arguments are ASCII numeric codes,
that is, ASCII codes between 48 and 57)
Command or Query.
Tx Scrambler state, where:
0 = Off
1 = On (V.35 in transparent mode, synchronous in
framed mode
All other codes invalid.
Example: TSC=1 (which is scrambler On)
Command or Query.
Tx Output power level between 0 and -20 dBm
(minus sign assumed). Example: TPL=13.4 (which is
-13.4 dBm)
Command or Query.
Tx Clock source, where:
1 = Internal
2 = External
3 = Loop timed (use Rx satellite clock)
All other codes invalid.
Example: TCK=2 (which is External Clock)
Command or Query.
Tx Carrier On/Off state, where:
0 = Off due to front panel or rem. control command
1 = On
2 = Off due to ext H/W Tx Carrier Off command (not
a valid argument when used as a command) All other
codes invalid.
Example: TXO=1 (which is Tx Carrier On)
Command or Query.
Rx Frequency, 52 MHz to 88 MHz, (70 MHz band) or
104 MHz to 176 MHz (140 MHz band).
Resolution = 100 Hz.
Example: RFQ=143.4567 (which is 143.4567 MHz)
Note: Querying 'Options Fitted' (using EID?) will
indicate if the unit has the 70 MHz or 140 MHz
synthesizer option fitted.
Command or Query.
Rx Data rate, in bps, between 2.4 kbps and 512
kbps. Resolution = 1 bps.
Example: RDR=002.400 (which is 2.4 kbps)
CDM-500 Closed Network Satellite Modem
Response to
Query
Command (target to
(Instruction
controller)
Code and
qualifier)
TSC= (message ok)
TSC?
TSC? (received ok,
but invalid argument
found)
TSQ* (message ok,
but not permitted in
current mode)
TPL= (message ok)
TPL?
TPL? (received ok,
but invalid arguments
found)
TPL* (message ok,
but not permitted in
current mode)
TCK= (message ok)
TCK?
TCK? (received ok,
but invalid argument
found)
TCK* (message ok,
but not permitted in
current mode)
TXO= (message ok)
TXO?
TXO? (received ok,
but invalid argument
found)
TXO* (message ok,
but not permitted in
current mode)
RFQ= (message ok)
RFQ?
RFQ? (received ok,
but invalid arguments
found)
RFQ* (message ok,
but not permitted in
current mode)
RDR= (message ok)
RDR?
RDR? (received ok,
but invalid arguments
found)
RDR* (message ok,
but not permitted in
current mode
Response to
query (target
to controller)
TSCS=x (same
format as
command
argument)
TPL=xx.x
(same format as
command
arguments)
TCK=x (same
format as
command
argument)
TXO=x (Note
that 2 is not a
valid argument
when used as a
command)
RFQ=xxx.xxxx
(same format as
command
arguments)
RDR=xxx.xxx
(same format as
command
arguments)
Rev. 1.3
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