Chapter 16 Upstream Issues
16.1 Introduction
This chapter covers a number of topics of interest to those using return plant or needing to understand the issues involved in the operation of return plant. You may wish to review Chapters 10 through 13, which cover relevant topics in distribution systems. This chapter builds on the material in those chapters.
Return, or upstream, signal levels must be managed differently from downstream signal levels, and this topic is covered in some depth. Return laser characteristics are covered, along with methods being used to determine the proper level at which to operate return lasers. Finally, noise on the return path is dealt with. Several methods of analyzing the problem are presented, as are several ...
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