Comtech EF Data CDM-710 Installation And Operation Manual page 254

CDM-710/L Broadcast Satellite Modem
Serial Interface Operation
Controller-to-Target
Instruction Code & Qualifier
Parameter
Type
Command Query
Tx FEC Code TCR= TCR?
Rate
Tx Symbol Rate TSR= TSR?
Auto Switch ASW= ASW?
Mode
Tx Output IMP= IMP?
Impedance
Number of
Arguments
for Command
(Note that all arguments are ASCII numeric codes from 48 and 57)
or Response
to Query
1 byte Command or Query.
Sets or returns Tx Code Rate* in the form x where:
0=Rate 3/4
1=Rate 7/8
2=Rate 3/5
3=Rate 4/5
4=Rate 5/6
5=Rate 8/9
6=Rate 9/10
7=Rate 2/3
8=Rate 1/2
COMMAND EXAMPLE: <0001/TCR=0{CR} (sets as Rate 3/4)
NOTE:
*See Chapter 2. SPECIFICATIONS for a list of available code rates for each
modulation type. Depending on FEC type, not all of these selections will be
valid.
9 bytes Command or Query.
Sets or returns Tx Symbol Rate in the form ss. ssssss where:
ss. ssssss=Symbol Rate in Msps
COMMAND EXAMPLE: <0001/TSR=20. 000000{CR} (sets as 20 Msps)
1 byte Command or Query.
Sets or returns the redundancy auto/manual mode of the unit in the form x
where:
0=Manual
1=Automatic
EXAMPLE: <0001/ASW=0{CR} (sets Manual switching mode)
1 byte (CDM-710 70/140 MHz UNIT ONLY)
Command or Query.
Sets or returns the Tx output impedance in the form x where:
0=50 Ohm
1=75 Ohm
COMMAND EXAMPLE: <0001/IMP=0{CR} (Sets as 50 Ohms)
9–46
Description of Arguments
MN/CDM710.IOM
Revision 12
Target-to-Controller
(See Description of Arguments)
Response to Response to
Command Query
TCR= TCR=x
TCR?
TCR*
TCR#
TSR= TSR=ss.ssssss
TSR?
TSR*
TSR#
ASW= ASW=x
ASW?
ASW*
ASW#
IMP= IMP=x
IMP?
IMP*
IMP#