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Comtech EF Data CDM-625 - E.3.3.2 Home > Modem > Modem TX

Comtech EF Data CDM-625
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CDM-625 Advanced Satellite Modem Revision 13
Appendix E MN-CDM625
E–24
E.3.3.2 Home > Modem > Modem TX
Open the Modem TX page from the Modem submenu. This page contains the following options:
Hot
Key
Dialog Window Option Entry
A
Tx FEC Type
Use the ↑↓ arrow keys to select:
None Diff Enc On
Viterbi
Viterbi Reed-Solomon
Sequential
Sequential Reed-Solomon
TCM
TCM Reed-Solomon
TPC
None Diff Enc Off
LDPC
VersaFEC
ULL
B Tx Mod Type
Use the ↑↓ arrow keys to select:
BPSK
QPSK
OQPSK
8PSK
16QAM
8QAM
C Tx FEC Code Rate
Use the ↑↓ arrow keys to select:
Rate 1/2
Rate 3/4
Rate 7/8
Rate 2/3
Rate 1/1
Rate 21/44
Rate 5/16
Rate 0.95
VersaFEC BPSK 0.488
VersaFEC QPSK 0.533
VersaFEC QPSK 0.631
VersaFEC QPSK 0.706
VersaFEC QPSK 0.803
VersaFEC 8QAM 0.642
VersaFEC 8QAM 0.711
VersaFEC 8QAM 0.780
VersaFEC 16QAM 0.731
VersaFEC 16QAM 0.780
VersaFEC 16QAM 0.829
VersaFEC 16QAM 0.853
VersaFEC 8QAM 0.576
VersaFEC 16QAM 0.644
VersaFEC ULL BPSK
0.493
VersaFEC ULL QPSK
0.493
VersaFEC ULL QPSK 0.654
VersaFEC ULL QPSK 0.734
D
Tx Data Rate Enter a value from
18.000
to
25000.000
Kbps
E Tx Symbol Rate Enter a value from 18.000 to 25000.000 Ksps

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