A cable television system provides a transmission path from a single signal processing center {traditionally referred to as head end) to multiple subscriber television receivers (Figure 1) The advent of transmission requirements from any point in the cable system back to the signal processing center results in a system with inputs from multiple locations in the cable system converging to a single output from the cable distribution system back to the head end.
Numerous articles have been written on parameters and performance requirements of the cable distribution system. This paper will focus on the television signal level from cable distribution system input (head end output) to its output, the TV receiver input terminal.