Comtech EF Data CDM-750, Installation And Operation Manual

Page: 188 / 300

CDM-750 Advanced High-Speed Trunking Modem Revision 2
Serial-based Remote Product Management MN-CDM750
7–10
7.5.2 Tx Parameters
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to Query
Tx Frequency TFQ= 9 bytes
Command or Query.
Set or return Tx Frequency in MHz, Resolution=100Hz, in the form xxxx.xxxx where the range is:
50 MHz to 180 MHz, and
950 MHz to 1950 MHz (L-Band – FAST option)
NOTE: The CDM-750 supports 70,140 MHz bands and L-Band.
Example: TFQ=0950.9872
TFQ=
TFQ?
TFQ*
TFQ#
TFQ? TFQ=xxxx.xxxx
Tx Framing
Mode
TFM= 1 byte, 0 or 1 Command or Query.
Set or return Tx Framing mode in the form x, where:
0 = DVB-S2 Normal
1 = DVB-S2 Short Block
Example: TFM=1 (selects DVB-S2 Short Block mode)
TFM=
TFM?
TFM*
TFM#
TFM? TFM=x
(see Description of
Arguments)
Tx MODCOD TMC= 2 bytes, value
of 1 to 36
Command or Query.
Set or return Tx Modulation, in the form xx, where:
TMC=
TMC?
TMC*
TMC#
TMC? TMC=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 = auto
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: TMC = 4