Comtech EF Data CDM-760 - Page 259

Serial Interface Operation Revision 3
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
8–16
Parameter Type
Controller-to-Target
Instruction Code and
Qualifier
Arguments for
Command or
Query
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 to 57)
Target-to-Controller
(see Description of Arguments)
Command Query
Response to
Command
Response to
Query
Rx Alpha
Rolloff
N/A
RAR?
1 byte, value of 0
thru 5
Query only.
Returns Rx Alpha Rolloff in the form x, where:
0=20%
1=25%
2=35%
3=5% (only available when NET>0)
4=10% (only available when NET>0)
5=15% (only available when NET>0)
EXAMPLE: <0/RAR?
>0000/RAR=0 (reports Rx Alpha Rolloff of 20%)
RAR?
RAR*
RAR#
RAR=x
Rx Gold Code
Sequence Index
RGS=
RGS?
6 bytes
Command or Query.
Sets or returns Rx Gold Code Sequence Index in the form xxxxxx, where:
xxxxxx=index number from 000000 to 262141
EXAMPLE: <0/RGS=189063
RGS=
RGS?
RGS*
RGS#
RGS=xxxxxx
Rx Pilot
N/A
RPI?
1 byte, value of 0
or 1
Query only.
Returns Rx Pilot status in the form x, where:
0=Off
1=On
NOTE: This is automatically detected on demod acquisition. If the unit is not locked, the query returns ‘x’.
RPI?
RPI*
RPI#
RPI=x
Es/No Alarm Point
EBA=
EBA?
4 bytes
Command or Query.
Sets or returns Es/No alarm point, in dB, in 0.1 dB steps, in the form sxxx where:
s=sign (+ or -)
xxx=alarm point * 10.
EXAMPLE: <0/EBA=+123 (sets alarm point to +12.3 dB)
EBA=
EBA?
EBA*
EBA#
EBA=sxxx