Comtech EF Data CDM-760 - Page 258

Serial Interface Operation Revision 3
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
8–15
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 ModCod
(cont.
For NET=2: Sets or returns Rx Modulation in the form xx, where:
00=ACM
01=reserved (QPSK 1/4)
02=reserved (QPSK 53/180)
03=reserved (QPSK 1/3)
04=reserved (QPSK 11/30)
05=reserved (QPSK 2/5)
06=reserved (QPSK 77/180)
07=reserved (QPSK 83/180)
08=QPSK 1/2
09=QPSK 8/15
10=QPSK 17/30
11=QPSK 3/5
12=QPSK 19/30
13=QPSK 2/3
14=QPSK 127/180
15=QPSK 3/4
16=QPSK 4/5
17=QPSK 5/6
18=QPSK 31/36
19=QPSK 8/9
20=QPSK 9/10
21=8PSK 17/30
22=8PSK 3/5
23=8PSK 19/30
24=8PSK 2/3
25=8PSK 127/180
26=8PSK 3/4
27=8PSK 4/5
28=8PSK 5/6
29=8PSK 31/36
30=8PSK 8/9
31=8PSK 9/10
32=16-ASK 19/30
33=16-APSK 2/3
34=16-APSK 128/180
35=16-APSK 3/4
36=16-APSK 4/5
37=16-APSK 5/6
38=16-APSK 31/36
39=16-APSK 8/9
40=16-APSK 9/10
41=32-APSK 127/180
42=32-APSK 3/4
43=32-APSK 4/5
44=32-APSK 5/6
45=32-APSK 31/36
46=32-APSK 8/9
47=32-APSK 9/10
48=64-APSK 4/5
49=64-APSK 5/6
50=64-APSK 31/36
51=64-APSK 8/9
52=64-APSK 9/10
All other codes are invalid.
Rx Symbol Rate
RSR=
RSR?
10 bytes, numeric
Command or Query.
Sets or returns Rx Symbol Rate, in ksps, in the form dddddd.ddd in the range:
QPSK – From .1 to 150000 ksps
8PSK – From .1 to 120000 ksps
16-APSK – From .1 to 90000 ksps
32-APSK – From .1 to 72000 ksps
64-APSK – From .1 to 54000 ksps
NOTE: If the Symbol Rate is set, then the Data Rate will be automatically calculated and updated.
EXAMPLE: <0/RSR=150000.000
RSR=
RSR?
RSR*
RSR#
RSR=dddddd.d
dd
Rx Data Rate
N/A
RDR?
10 bytes
Query only.
Returns Rx Data Rate, in kbps, in the form xxxxxx.xxx
EXAMPLE: <0/RDR?
>0000/RDR=002047.999
RDR?
RDR*
RDR#
RDR=xxxxxx.xx
x
Rx Spectrum Invert
N/A
RSI?
1 byte, value of 0
or 1
Query only.
Returns Rx Spectrum Invert in the form x, where:
0=Normal
1=Rx Spectrum Inverted
EXAMPLE: <0/RSI?
>0000/RSI=0 (selects Normal)
RSI?
RSI*
RSI#
RSI=x