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超短波调频广播信道复用系统各种各样,有供立体声广播、双语言电视伴音以及播出两套或更多套独立节目用的许多复用系统。大多数系统是利用频率复用法,此法的原理是在主调制信号内引入超音频副载波。副信道信号对副载波的调制有各种类型:调幅、平衡调幅,
The FM radio channel multiplexing system is available in a wide variety of formats, including multiplexed systems for stereo broadcasts, dual-language TV soundtracks, and two or more sets of independent programs. Most systems use frequency multiplexing, the principle of which is to introduce sub-audio subcarriers into the main modulated signal. Sub-channel signal modulation on sub-carriers have various types: AM, balanced AM,