Comtech EF Data CDM-550T Manual page 126

Remote Control
Parameter Command
Type (InstructionC
ode and
qualifier)
Unit ITF=
Interface Type
Unit Framing FRM=
Mode
Unit Test TST=
Mode
Unit IF IMP=
Impedance
Unit Alarm MSK=
Mask
15–12
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 Terrestrial interface type, where:
1 = EIA-422/EIA530 DCE,
2 = V.35 DCE
3 = EIA-232 (sync).
All other codes invalid. Example: ITF=2 (V.35)
1 byte, value of Command or Query.
0 or 1 Unit operating mode, where
0 = Unframed - transparent (distant-end M&C not possible)
1 = Framed (EDMAC distant-end M&C possible)
Example: FRM=1 (which is framed)
1 byte, value of 0 = Normal
0,1,2,3,4 or 5 1 = IF loopback
2 = Digital loopback
3 = I/O loopback
4 = Tx CW
5 = Tx Alternating 1,0 pattern
6 = RF loopback
All other codes invalid. Example TST=4 (which is transmit
CW)
1 byte, value of Command or Query.
5 or 7 IF interface impedance, where:
5 = 50 ohms
7 = 75 ohms
All other codes invalid. Example IMP=7 ( 75 ohms)
5 bytes, each Command or Query.
with a value of 0 Alarm mask conditions, in the form abcde, where:
or 1 a = mask Tx AIS alarm, b = mask Rx AGC alarm
c = mask buffer alarms, d = mask Rx AIS alarm
e = mask Eb/No alarm
Setting any of these bytes to 0 unmasks alarm, setting to 1
masks them. Example: MSK=01011
CDM-550T Satellite Modem
Response to Command Query
(target to controller) (Instruction
Code and
qualifier)
ITF= (message ok) ITF?
ITF? (received ok, but
invalid args found)
ITF* (message ok, but
not permitted in current
mode)
FRM= (message ok) FRM?
FRM? (received ok,
but invalid argument
found)
FRM* (message ok, but
not permitted in current
mode)
TST= (message ok) TST?
TST? (received ok,
but invalid argument
found)
TST* (message ok, but
not permitted in current
mode)
IMP= (message ok) IMP?
IMP? (received ok,
but invalid argument
found)
MSK= (message ok) MSK?
MSK? (received ok,
but invalid arguments
found)
MSK* (message ok, but
not permitted in current
mode)
Response to query
(target to controller)
ITF=x
(same format
as command argument)
FRM=x
(same format as
command argument)
TST=x
(same format as
command argument)
IMP=x
(same format as
command argument)
MSK=abcde
(same format as
command arguments)
Rev. 1.3