Comtech EF Data Vipersat SLM-5650A, Installation And Operation Manual

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SLM-5650A Satellite Modem
Revision 10
Appendix B B–2 MN-SLM-5650A
B.2 Modes
The Data Rates and Symbol Rates shown in the following tables all assume that Transmission
Security (TRANSEC) is turned
off . In order to calculate the max data rate with TRANSEC on , the
max data rate shown in the table becomes a max aggregate data rate. The real data rate can be
calculated by dividing the TRANSEC overhead rate from the aggregate data rate. The TRANSEC
overhead rate can be calculated for any TRANSEC Frame Length (N) as follows:
TRANSEC Overhead Rate = (3 + 16 * N) / (16 * N)
B.2.1 OM-73 Mode
Modulation Type
Data Rate (kbps) Symbol Rate (ksps)
Min Max Min Max
BPSK 1/1 64 8472 64 10000
BPSK 1/2 64 15000 128 30000
BPSK 3/4 64 22500 85.333 29999.999
BPSK 7/8 64 26250 73.142 30000
QPSK 1/1 64 20000 32 10000
QPSK 1/2 64 30000 64 30000
QPSK 3/4 64 45000 42.666 30000
QPSK 7/8 64 51840 36.571 29622.857
OQPSK 1/1 64 20000 32 10000
OQPSK 1/2 64 30000 64 30000
OQPSK 3/4 64 45000 42.666 30000
OQPSK 7/8 64 51840 36.571 29622.857
B.2.2 MIL-STD-188-165A Mode
Modulation Type
R-S Code
Word
R-S Depth
Data Rate (kbps) Symbol Rate (ksps)
Min Max Min Max
BPSK 1/1 Off N/A 64 8472 64 10000
BPSK 1/2 Off N/A 64 15000 128 30000
BPSK 3/4 Off N/A 64 22500 85.333 29999.999
BPSK 7/8 Off N/A 64 26250 73.142 30000
QPSK 1/1 Off N/A 64 20000 32 10000
QPSK 1/2 Off N/A 64 30000 64 30000
QPSK 3/4 Off N/A 64 45000 42.666 30000
QPSK 7/8 Off N/A 64 51840 36.571 29622.857