Comtech EF Data CDM-500 - Manual (Page 73)

Remote Control CDM-500 Closed Network Satellite Modem
B–8 Rev. 1.3
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 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)
Tx Carrier
On/Off State TXO= 1 byte, value of
0, 1 or 2 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) TXO= (message ok)
TXO? (received ok,
but invalid argument
found)
TXO* (message ok,
but not permitted in
current mode) TXO? TXO=x (Note
that 2 is not a
valid argument
when used as a
command)
Rx Frequency RFQ= 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 has the 70 MHz or 140 MHz
synthesizer option fitted. RFQ= (message ok)
RFQ? (received ok,
but invalid arguments
found)
RFQ* (message ok,
but not permitted in
current mode) RFQ? RFQ=xxx.xxxx
(same format as
command
arguments)
Rx Data Rate RDR= 7 bytes 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) RDR= (message ok)
RDR? (received ok,
but invalid arguments
found)
RDR* (message ok,
but not permitted in
current mode RDR? RDR=xxx.xxx
(same format as
command
arguments)