Abstract
This chapter focuses on coaxial distribution networks, how they are designed and powered, and the nature of signal degradation through such networks. Cable television coaxial distribution systems consist of a cascade of cable, amplifiers, and passive RF components. The network typically branches in the downstream direction, using both discrete passive RF devices and devices internal to active equipment used to create the legs. The amplifiers are capable of amplifying signals flowing in both directions, with the downstream bandwidth extending from approximately the lowest broadcast television channel to an upper limit determined by the bandwidth needs of the network, but typically 400 to 1000 MHz. The upstream bandwidth typically extends from 5 MHz to somewhere between 30 and 42 MHz. In the downstream direction, distribution networks with multiple, identical amplifiers in cascade are usually designed and operated so that the gain, measured from amplifier output to amplifier output, is unity.
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