Comtech EF Data SLM-5650B, Инструкция по установке и эксплуатации

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SLM-5650B Satellite Modem
Revision 2
Table of Contents ix MN-SLM-5650B
D.8.1 Introduction ...............................................................................................................................D–7
D.8.2 LDPC versus TPC .....................................................................................................................D–8
D.9 Direct Sequence Spread Spectrum (FAST Option) ............................................................... D–10
APPENDIX E. OVERHEAD AND SYMBOL RATE CALCULATIONS ................................................. E–1
E.1 Overview ...................................................................................................................................... E–1
E.2 SLM-5650B Processing Flow and Symbol Rate Calculation .................................................. E–2
E.3 Sources of Overhead .................................................................................................................. E–4
E.3.1 Framing Overhead .................................................................................................................... E–4
E.3.1.1 Reed–Solomon/Outside FEC Codec Framing Factor ................................................... E–4
E.3.1.2 AUPC/ASYNC (ESC) and ACPC Channel Framing ...................................................... E–4
E.3.1.3
TRANSEC Framing ....................................................................................................... E–5
E.3.2 Total Framing Overhead ............................................................................................................ E–5
E.3.3 IP Traffic Encapsulation Overhead ............................................................................................ E–5
E.4 Product Support .......................................................................................................................... E–6