Introduction - Comtech EF Data SNM-1001L Installation And Operation Manual

7.1

Introduction

The SNM-1001L is equipped with several Forward Error Correction (FEC) encoders and
decoders:
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The constraint lengths and encoding polynomials are not only Open Network compatible, but
also are Closed Network compatible with the vast majority of existing modems.
The SNM-1001L can be fitted with a Turbo Product Codec. Turbo Product Coding is small
SIMM module that can be fitted to the unit at time of manufacturing.
Chapter 7. FORWARD ERROR
Viterbi
Sequential
Reed-Solomon (Concatenated per Intelsat)
Reed-Solomon (Concatenated per Closed Network)
Trellis (FAST option)
Turbo Codec
Uncoded
CORRECTION (FEC)
7–1