Comtech EF Data CDM-550T - Manual (Page 124)

CDM-550T Satellite Modem Revision 3
Remote Control MN/CDM550T.IOM
15–8
Parameter
Type
Command
(Instruction
Code 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)
Tx Frequency TFQ= 8 bytes Command or Query.
Tx Frequency, 52 MHz to 88 MHz, (70 MHz band) or 104 MHz
to 176 MHz, (140 MHz band).
Resolution = 100Hz.
Example: TFQ=072.9876 (70 MHz option)
TFQ=148.0000 (140 MHz option)
Note: Querying ‘Options Fitted’ (using EID?) will indicate if the
unit is 70 MHz or 140 MHz IF band TFQ= (message ok)
TFQ? (received ok,
but invalid arguments
found)
TFQ* (message ok, but
not permitted in current
mode) TFQ? TFQ=xxx.xxxx
(same format
as command
arguments)
Tx
Data Rate TDR= 8 bytes Command or Query.
Tx Data rate, in kbps, between 2.4 kbps and 2048 kbps.
Resolution = 1 bps.
Example: TDR=2047.999 (which is 2047.999 kbps) TDR= (message ok)
TDR? (received ok,
but invalid arguments
found)
TFQ* (message ok, but
not permitted in current
mode) TDR? TDR=xxxx.xxx
(same format
as command
arguments)
Tx Spectrum
Invert TSI= 1 byte, value of 0
or 1 Command or Query.
Tx Spectrum Invert selection, where:
0 = Normal,
1 = Tx Spectrum Inverted
All other codes invalid.
Example:TSI=0 (which is normal) TSI= (message ok)
TSI? (received ok, but
invalid arg. found)
TSI* (message ok, but not
permitted in current
mode) TSI? TSI=x
(same format
as command
argument)
Tx
Scrambler TSC= 1 byte, value of 0
or 1 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) TSC= (message ok)
TSC? (received ok,
but invalid argument
found)
TSQ* (message ok, but
not permitted in current
mode) TSC? TSCS=x
(same format
as command
argument)
Tx Power Level TPL= 4 bytes Command or Query.
Tx Output power level between 0 and -20 dBm (minus sign
assumed). Example: TPL=13.4 (which is
-13.4 dBm) TPL= (message ok)
TPL? (received ok,
but invalid arguments
found)
TPL* (message ok, but
not permitted in current
mode) TPL?
TPL=xx.x
(same format
as command
arguments)
Tx Clock Source TCK=
1 byte, value of
1,2 or 3 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) TCK= (message ok)
TCK? (received ok,
but invalid argument
found)
TCK* (message ok, but
not permitted in current
mode) TCK?
TCK=x
(same format
as command
argument)