Comtech EF Data SLM-5650A Installation And Operation Manual page 272

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:
B.2.1 OM-73 Mode
Modulation Type
BPSK 1/1
BPSK 1/2
BPSK 3/4
BPSK 7/8
QPSK 1/1
QPSK 1/2
QPSK 3/4
QPSK 7/8
OQPSK 1/1
OQPSK 1/2
OQPSK 3/4
OQPSK 7/8
B.2.2 MIL-STD-188-165A Mode
R-S Code
Modulation Type
BPSK 1/1
BPSK 1/2
BPSK 3/4
BPSK 7/8
QPSK 1/1
QPSK 1/2
QPSK 3/4
QPSK 7/8
Appendix B
TRANSEC Overhead Rate = (3 + 16 * N) / (16 * N)
Data Rate (kbps)
Min
64
64
64
64
64
64
64
64
64
64
64
64
R-S Depth
Word
Off N/A
Off N/A
Off N/A
Off N/A
Off N/A
Off N/A
Off N/A
Off N/A
Max Min
8472
15000 128
22500 85.333
26250 73.142
20000
30000
45000 42.666
51840 36.571
20000
30000
45000 42.666
51840 36.571
Data Rate (kbps)
Min Max
64 8472
64 15000
64 22500
64 26250
64 20000
64 30000
64 45000
64 51840
B–2
SLM-5650A Satellite Modem
Revision 10
Symbol Rate (ksps)
Max
64 10000
30000
29999.999
30000
32 10000
64 30000
30000
29622.857
32 10000
64 30000
30000
29622.857
Symbol Rate (ksps)
Min
64 10000
128 30000
85.333 29999.999
73.142 30000
32 10000
64 30000
42.666 30000
36.571 29622.857
MN-SLM-5650A
Max