Comtech EF Data CDM-750 - Manual (Page 193)

CDM-750 Advanced High-Speed Trunking Modem Revision 2
Serial-based Remote Product Management MN-CDM750
7–13
7.5.3 Rx Parameters
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to Query
Rx Frequency RFQ= 9 bytes
Command or Query.
Set or return Rx Frequency ranges in MHz, Resolution=100Hz, in the form xxxx.xxxx where the range is:
50 MHz to 180 MHz, and 950 MHz to 2150 MHz
NOTE: The CDM-750 supports 70,140 MHz bands and L-Band.
Example: RFQ=0950.9872
RFQ=
RFQ?
RFQ*
RFQ#
RFQ? RFQ=xxxx.xxxx
(see Description of
Arguments)
Rx Framing
Mode N/A 1 byte, value of
0 or 1 Query only.
Returns Rx Framing mode in the form x, where:
0 = DVB-S2 Normal
1 = DVB-S2 Short Block
Example: RFM=1 (selects DVB-S2 Short Block mode)
N/A RFM? RFM=x
(see Description of
Arguments)
Rx MODCOD N/A 2 bytes Query only.
Returns Rx Demodulation in the form xx, where: N/A RMC? RMC=xx
(see Description of
Arguments) 0 = reserved
1 = reserved (QPSK ¼)
2 = reserved (QPSK 1/3)
3 = reserved (QPSK 2/5)
4 = QPSK 1/2
5 = QPSK 3/5
6 = QPSK 2/3
7 = QPSK ¾
8 = QPSK 4/5
9 = QPSK 5/6
10 = QPSK 8/9
11 = QPSK 9/10 *
12 = 8PSK 3/5
13 = 8PSK 2/3
14 = 8PSK 3/4
15 = 8PSK 5/6
16 = 8PSK 8/9
17 = 8PSK 9/10 *
18 = 16-APSK 2/3
19 = 16-APSK 3/4
20 = 16-APSK 4/5
21 = 16-APSK 5/6
22 = 16-APSK 8/9
23 = 16-APSK 9/10 *
24 = 32-APSK ¾
25 = 32-APSK 4/5
26 = 32-APSK 5/6
27 = 32-APSK 8/9
28 = 32-APSK 9/10 *
29 = reserved
30 = reserved
31 = reserved
32 = reserved
33 = reserved (DVB-S QPSK ½)
34 = reserved (DVB-S QPSK 2/3)
35 = reserved (DVB-S QPSK ¾)
36 = reserved (DVB-S QPSK 5/6)
37 = reserved (DVB-S QPSK 7/8)
All other codes are invalid.
Example: RMC=4
Rx Symbol
Rate
RSR= 10 bytes,
numeric
Command or Query.
Set or return Rx Symbol Rate, in Ksps, in the form dddddd.ddd where the valid range is:
QPSK/8PSK: 1000 to 63000Ksps
16APSK: 1000 to 47000Ksps
32APSK: 1000 to 38000Ksps
* All 9/10 MODCODs are not valid in Short Block operation
NOTE: If the Symbol Rate is set, then the Data Rate rate will be automatically calculated and updated.
RSR=
RSR?
RSR*
RSR#
RSR? RSR=dddddd.ddd
(see Description of
Arguments)