CHANNEL PRESET ADJUSTING SYSTEM FOR ELECTRONIC TUNER

摘要

PURPOSE:To easily and rapidly execute a channel preset adjustment by using audio and video output terminals and presetting channel frequency data. CONSTITUTION:An electronic equipment 12 on which an electronic tuner for a television signal is mounted has the channel preset circuit for storing the frequency data to a broadcasting channel and the output terminal for the received video signal and the audio signal. In a process in which the frequency is moved to the adjusting direction of a tuning point, the audio signal from the audio output terminal is inputted to an audio distortion ratio measuring device 10 to detect whether the tuning point is present in the vicinity or not according to this audio signal. In the vicinity of the tuning point, a video signal from a video output terminal is inputted to a video level measuring device 11 and a fine tuning is detected based on this video signal.