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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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