【摘 要】
：
在多制式电视机中,视频检波器除输出彩色全电视信号外,还输出D/K(6.5 MHz)、I(6.0 MHz)、B/G(5.5 MHz)和M(4.5 MHz)伴音中频信号(括号中为该制式对应的伴音中频,其中D/K为中
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在多制式电视机中,视频检波器除输出彩色全电视信号外,还输出D/K(6.5 MHz)、I(6.0 MHz)、B/G(5.5 MHz)和M(4.5 MHz)伴音中频信号(括号中为该制式对应的伴音中频,其中D/K为中国制式,I为香港制式),因此,这类彩电应设有多种伴音选择电路。同时,多制式彩电还设法对多种伴音中频进行鉴频,伴音鉴频和伴音中频选择要相互配套。一、彩电常用下列两种处
In multi-format TVs, the video detector outputs D / K (6.5 MHz), I (6.0 MHz), B / G (5.5 MHz) and M (4.5 MHz) audio intermediate frequency signals (In parentheses for the system corresponding audio intermediate frequency, where D / K for the Chinese system, I for the Hong Kong system), therefore, such color TV should be equipped with a variety of audio selection circuit. At the same time, multi-system color TV also try to discriminate a variety of audio intermediate frequency, audio frequency and audio intermediate frequency selection to complement each other. First, the following two commonly used color TV
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