Table of Contents
Advertisement
Serial Interface Operation
CDM-760 Advanced High-Speed Trunking Modem
Controller-to-Target
Instruction Code and
Qualifier
Parameter Type
Command
Query
Rx Alpha
N/A
RAR?
Rolloff
Rx Gold Code
RGS=
RGS?
Sequence Index
Rx Pilot
N/A
RPI?
Es/No Alarm Point
EBA=
EBA?
Arguments for
Description of Arguments
Command or
(Note that all arguments are ASCII numeric codes from 48 to 57)
Query
1 byte, value of 0
Query only.
thru 5
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%)
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
1 byte, value of 0
Query only.
or 1
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'.
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)
8–16
Revision 3
MN-CDM760
Target-to-Controller
(see Description of Arguments)
Response to
Response to
Command
Query
RAR?
RAR=x
RAR*
RAR#
RGS=
RGS=xxxxxx
RGS?
RGS*
RGS#
RPI?
RPI=x
RPI*
RPI#
EBA=
EBA=sxxx
EBA?
EBA*
EBA#
Advertisement
Table of Contents
