Robert G. Middleton, Using Scopes in Color TV, Howard W. Sams & Co., 1969


The function of the bandpass amplifier is to separate the chroma signal from the complete color signal, as shown in Fig. 5-1 [right]. The Y signal is rejected, and the chroma signal is passed. Since the horizontal sync pulse is a part of the Y signal, the sync pulse is rejected. Some bandpass amplifiers have an output waveform which contains the color burst, as seen in [A].