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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A printing plate comes with sharp detail , whether it's FM or am screening has excellent performance.

印版还具备锐利的细节，无论是调频或调幅加网都有极好的表现。

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Telephony, network and cable television, music-oriented FM radio, AM talk radio, even satellite radio and television all see their foundations crumbling under the onslaught of the Internet.

FORBES: Golden Times--Even If We Don't Know It

There have been attempts to crack those stereotypes, but if anything, it's even harder than it was in Hendrix's day, a time when AM Top 40 had plenty of variety, free-form FM radio welcomed experimenting and record labels strained to catch up with it all.

CNN: The not-so-slight return of Jimi Hendrix

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