Comtech EF Data CDM-550T Manual page 123

CDM-550T Satellite Modem
Parameter Command
Type (InstructionC
ode and
qualifier)
Tx Clock Source TCK=
Tx Carrier TXO=
On/Off State
Rx RFQ=
Frequency
Rx Data RDR=
Rate
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
1 byte, value of Command or Query.
1,2 or 3 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)
1 byte, value of Command or Query.
0, 1 or 2 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)
Example: TXO=1 (which is Tx Carrier On)
8 bytes 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 is 70 MHz or 140 MHz IF band
8 bytes Command or Query.
Rx Data rate, in bps, between 2.4 kbps and 2048 kbps.
Resolution = 1 bps.
Example: RDR=002.400 (which is 2.4 kbps)
Response to Command
(target to controller)
TCK= (message ok)
TCK? (received ok,
but invalid argument
found)
TCK* (message ok, but
not permitted in current
mode)
TXO= (message ok)
TXO? (received ok,
but invalid argument
found)
TXO* (message ok, but
All other codes invalid. not permitted in current
mode)
RFQ= (message ok)
RFQ? (received ok,
but invalid arguments
found)
RFQ* (message ok, but
not permitted in current
mode)
RDR= (message ok)
RDR? (received ok,
but invalid arguments
found)
RDR* (message ok, but
not permitted in current
mode
Remote Control
Query Response to query
(Instruction (target to controller)
Code and
qualifier)
TCK? TCK=x
(same format as
command argument)
TXO? TXO=x
(Note that 2 is not a
valid argument when
used as a command)
RFQ? RFQ=xxx.xxxx (same
format as command
arguments)
RDR? RDR=xxxx.xxx
(same format as
command arguments)
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