Correlation Between TV Transmitter Performance Measurements and Picture Quality

Certain transmitter adjustments are customarily made by optimizing performance as measured at the output of a visual demodulator. For reasons discussed in the text, demodulators used at the transmitter must have different design characteristics than typical home receivers. As a consequence, picture quality on the station monitor may be somewhat different than that seen on the average home receiver. The differences are described in the paper. Even if the transmitter were adjusted with typical receiver performance in mind, it is shown that the best transmitter adjustment for one receiver would not be the best for receivers designed with different selectivities and/or different envelope delays.