Frequency modulation
Frequency modulation, or FM, was a method of radio communications which involved slightly varying the frequency of the transmission being sent. This was different from amplitude modulation, which varied the strength of the signal.

In 2024, FM 88.8 was a radio station in Los Angeles that was advertised on an interior sign of a Metro Local bus. ()

FM radio transmissions were detected coming from the planet 892-IV in 2268 by Uhura on board the . ()

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Communications technology