Comtech EF Data SLM-5650C CyberLynx, Installation And Operation Manual

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SLM-5650C / SLM-5650C-ODU Satellite Modem
Revision 1
Introduction 1–12 MN-SLM-5650C
Table 1-7. Doppler Requirements
Parameter C-Band X-Band Ku-Band Ka-Band
Doppler Shift in Hz ± 2475 ± 3535 ± 6045 ± 11,810
Doppler Rate of Change in Hz/sec ± 226 ± 270 ± 490 ± 1046
Doppler Acceleration in Hz/sec
2
± 243 ± 290 ± 526 ± 1124
1.5.2 Data Quality Performance
OM-73 Compatible Mode Performance
Operating in the OM-73-compatible mode, both modems vs. Eb/No performance with differential
encoding and data scrambling enabled do not exceed the values shown in Table 1-8 through
Table 1-14.
MIL-STD-188-165A Compatible Mode Performance
Operating with BPSK, QPSK, or OQPSK modulation in the MIL-STD-188-165A compatible mode,
both modems BER vs. Eb/No performance with differential encoding and data scrambling
enabled will not exceed values shown in Table 1-8 (without Reed-Solomon) or Table 1-9
(with
Reed-Solomon) tested in an IF back-to-back configuration over the BER range
5 x 10
-3 to 1 x 10 -7 .
Operating with 8PSK modulation and rate 2/3 pragmatic Trellis coding (without Reed-Solomon
outer coding), both modems vs. Eb/No performance is less than or equal to the values shown in
Table 1-10 when tested in an IF back-to-back configuration.
Operating with 8PSK modulation, rate 2/3 pragmatic Trellis coding, and Reed-Solomon (219,201)
outer coding, both modems vs. Eb/No performance is better than or equal to the values shown in
Table 1-11 when tested in an IF back-to-back configuration.
IESS-308 Compatible Mode Performance
When operating in the IESS-308 Compatible Mode, both modems BER vs. Eb/No performance is
as specified in IESS-308.
IESS-309 Compatible Mode Performance
When operating in the IESS-309 Compatible Mode, both modems BER vs. Eb/No performance is
as specified in IESS-309.
IESS-310 Compatible Mode Performance
When operating in the IESS-310 Compatible Mode, both modems BER vs. Eb/No performance is
as specified in IESS-310.
16QAM Coding Mode Performance
Both modems operating in the 16QAM mode provides back-to-back BER vs. Eb/No performance
better than or equal to the values shown in Table 1-12 when using the modulation formats
indicated.