Comtech EF Data CDM-550T, Manual

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Remote Control CDM-550T Satellite Modem
15–8 Rev. 1.3
Parameter
Type Command
(InstructionC
ode 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
FEC Code Rate TCR= 1 byte, value of
1,3, 7, 8 or 9 Command or Query.
Tx FEC Code rate, where:
1 = Rate 1/2
3 = Rate 3/4 (must be set for Rate 3/4 Turbo)
7 = Rate 7/8
8 = Rate 21/44 (must set for Rate 21/44 Turbo)*
9 = Rate 5/16 (must set for Rate 5/16 Turbo)*
All other codes invalid.
Example: TCR=1 (which is Rate 1/2)
* Only valid for S/W > 1.14 and EID =5500xx
As a Query, returns 0 if Uncoded is selected for FEC.
Setting 8 or 9 may affect TFT and TMD. TCR= (message ok)
TCR? (received ok,
but invalid argument
found)
TCR* (message ok, but
not permitted in current
mode - for example if
Turbo is selected, and
either 1/2 or 7/8 is
requested) TCR? TCR=x
(same format as
command argument)
Tx Modulation
Type TMD= 1 byte, value of
1 or 2 or 3 Command or Query.
Tx Modulation type, where:
1 = BPSK (must be set for Rate 21/44 or 5/16 Turbo mode)
2 = QPSK (must be set for Rate 3/4 Turbo QPSK mode)
3 = OQPSK (must be set for Rate 3/4 Turbo OQPSK mode)
All other codes invalid.
Example: TMD=2 (which is QPSK) TMD= (message ok)
TMD? (received ok,
but invalid argument
found)
TMD* (message ok, but
not permitted in current
mode) TMD? TMD=x
(same format as
command argument)
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)