ABSTRACT
Unlike program material, test signals are designed to assist in achieving precisely defined measurements in the video signal. They are used to determine whether a piece of equipment or system is working properly, to measure noise levels in the signal, chroma errors, errors that occur in the converging of the chroma and luminance signals, and to measure signal levels to ensure they meet proper standards. There is a multitude of test signals, each one designed to measure a specific aspect of the television signal.
