What does AM mean in cars?

1 Answers
HazelFitz
07/29/25 9:22am
AM band refers to medium-wave broadcasting. Car radios have two modes: one is FM, and the other is AM, but FM is more commonly used in daily life. Here is some extended information: 1. Broadcast frequency range: The broadcast frequency range is similar to the frequency scale marked on ordinary civilian radios for medium wave (525~1610KHz) and shortwave (3200~22000KHz). The band range may vary for radios of different brands. 2. AM broadcasting: AM broadcasting modulates the audio signal onto the "amplitude" of a high-frequency carrier wave and transmits it into the air. The radio receives the AM radio signals in the air through a magnetic antenna or an external antenna, and then demodulates the audio signal through circuits such as high-frequency tuning → intermediate frequency amplification → detection. The audio signal is then amplified by the audio amplification circuit to restore the radio program content.
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