| 摘要 |
PURPOSE:To display a signal which displays the level of an audio signal also on a home-use television receiver, by converting the signal into video signal on a channel of the home-use television receiver. CONSTITUTION:A test signal from a test signal generator 15 is converted into a digital signal when a maximum output level is detected, applied to a CPU9 and stored in a memory 25. A dot pattern for practical maximum output level MOL curve display is preset in a video display generator 26, this is picked up in response to horizontal and vertical synchronizing signals of video signal and summed with a waveform display signal from a waveform display signal generator 34 and a spectrum display signal at an adder 38, converted into a video carrier frequency on a vacant channel of a home-use television receiver 37 at an RF modulator 36 and displayed on the receiver 37. |
