New Equipment for Measuring Envelope Delay

The envelope delay characteristic is an extremely important factor in television systems. The effect of improper envelope delay is quite pronounced in color television, but a properly corrected system is also necessary for monochrome transmission if the optimum in picture quality is to be obtained. A new measuring technique has been developed which provides a low frequency reference to properly relate the envelope delay of the high and low frequency components of the video signal. The RCA BW-8A Envelope Delay Measuring Set utilizes this new technique, and is designed for television station use. This paper highlights the importance of the envelope delay characteristic and describes the new measurement technique.