Comtech EF Data SLM-5650A Installation And Operation Manual page 8

APPENDIX A. TROUBLESHOOTING ..................................................................................................A–1
A.1 Overview ..................................................................................................................................... A–1
A.2 System Checkout ....................................................................................................................... A–1
A.2.1 Interface Checkout .................................................................................................................... A–2
A.2.2 Modulator Checkout .................................................................................................................. A–3
A.2.3 Demodulator Checkout ............................................................................................................. A–6
A.3 Fault Isolation ............................................................................................................................. A–9
A.4 System Faults/Alarms .............................................................................................................. A–10
A.5 LED Indicator Faults ................................................................................................................ A–12
APPENDIX B. OPERATIONAL REFERENCES ...................................................................................B–1
B.1 Overview ..................................................................................................................................... B–1
B.2 Modes .......................................................................................................................................... B–2
B.2.1 OM-73 Mode ............................................................................................................................. B–2
B.2.2 MIL-STD-188-165A Mode ......................................................................................................... B–2
B.2.3 MIL-STD-188-165A Mode – Sequential .................................................................................... B–4
B.2.4 IESS-308 Mode – Standard Higher Rates ................................................................................ B–5
B.2.5 IESS-308 Mode – Extended ..................................................................................................... B–8
B.2.6 IESS-309 Mode – Extended (Closed Network) ...................................................................... B–10
B.2.7 IESS-310 Mode – Extended Rates ......................................................................................... B–11
B.2.8 Turbo Code Mode ................................................................................................................... B–11
B.2.9 16-QAM Mode ......................................................................................................................... B–12
B.2.10 AUPC Mode ............................................................................................................................ B–12
B.2.11 AUPC Mode – Sequential ....................................................................................................... B–13
B.2.12 AUPC Mode – Turbo ............................................................................................................... B–14
B.2.13 LDPC Mode – Ultra Low Latency (ULL) ................................................................................. B–14
B.2.14 LDPC Mode – Low Latency (LL) ............................................................................................. B–15
B.2.15 LDPC Mode – High Performance (HP) ................................................................................... B–15
B.3 Clocking Options ..................................................................................................................... B–16
B.3.1 IDR/IBS G.703 Master/Master ................................................................................................ B–16
B.3.2 IDR/IBS G.703 Master/Slave .................................................................................................. B–18
B.4 Buffering ................................................................................................................................... B–20
B.4.1 Buffer Size .............................................................................................................................. B–22
B.4.1.1 Doppler ........................................................................................................................ B–22
B.4.1.2 Plesiochronous ............................................................................................................ B–23
B.4.1.3 Frame / Multiframe Length .......................................................................................... B–24
B.4.1.3.1 Multiples of the Frame Length ................................................................................. B–24
B.4.1.3.2 Total Buffer Length ................................................................................................... B–24
B.4.1.3.3 Converting Between Bits and Seconds ................................................................... B–24
APPENDIX C. MODEM OPTIONS .......................................................................................................C–1
C.1 Forward Error Correction Options ........................................................................................... C–1
C.2 Viterbi .......................................................................................................................................... C–1
C.3 Trellis Coding (FAST Option) .................................................................................................... C–2
C.4 Reed-Solomon Outer Codec ..................................................................................................... C–3
C.5 Closed Network Mode ................................................................................................................ C–4
C.6 Turbo Product Codec ................................................................................................................. C–5
C.7 Sequential (FAST Option) .......................................................................................................... C–6
C.8 Low Density Parity Check (LDPC) Coding (FAST Option) ..................................................... C–7
C.8.1 Introduction ...............................................................................................................................C–7
C.8.2 LDPC versus TPC .....................................................................................................................C–8
C.9 Direct Sequence Spread Spectrum (FAST Option) ............................................................... C–10
Table of Contents TOC-6
SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A