From discrete components radio to consist of Integrated Circuits radio, from the ordinary to the senior FM radio AM FM radio.

从分立元件组成的收音机到由集成电路组成的收音机，从普通的调幅收音机到高级调频收音机。

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The composite video signal is transmitted as an AM signal and the sound as an FM signal on these channels.

在每个频道中，组合视频信号被当作调幅（AM）信号传输，声音信号作为FM（调频）信号传输。

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An engineer added an AM channel alongside the FM signal so that the station can be heard, on clear days, in places as far away as Europe.

一位工程师在FM信号的旁边又增加了AM频道，在晴朗的天气里，像欧洲那么远的地方都可以听到他们的广播。

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FM radio provided better sound reproduction and less noise or interference than traditional AM radio.

VOA: special.2010.01.31

In the not-too-distant future, a car with a radio that receives only AM or FM will qualify as an antique.

WSJ: Mobile Hot Spots: Web Radio, Apps Move to the Dashboard

When an AM or FM radio station plays a song, the composer gets a royalty payment, but the performer doesn't.

FORBES: Digital Tools

There are 13, 000 AM and FM broadcast radio stations in the U.S., and just over 2, 000 of them have been converted to HD.

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