SIGNAL SELECTION APPARATUS

摘要

A television transmission system includes a source of television signals. The television signals are within a given spectrum of frequencies. The spectrum can be divided into a first group of channels wherein each channel has a different range of frequencies or into a second group of channels such as the conventional VHF (very high frequency) channels wherein each channel has a range of frequencies different from the ranges of the first group. The source alternately transmits television signals in the first and second groups of channels.