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What does the FM button in a car mean?

1 Answers

OGabriela

07/30/25 6:21am

The FM button in a car refers to the frequency modulation band in the radio function. Its working principle is: modulating the audio signal onto the frequency of a high-frequency carrier wave, transmitting it into the air, and the FM radio receives the radio signal through the antenna. After tuning, intermediate frequency amplification, and frequency discrimination circuits, the audio signal is separated, amplified at low frequency, and output through the speaker to produce sound. The buttons in the car are divided into: 1. Fuel tank opening button: remotely opens the fuel tank cap inside the car; 2. ESP switch: used to turn the vehicle's ESP on or off; 3. Central locking button: the control button for the vehicle's central door lock; 4. Headlight cleaning button: controls the automatic cleaning function of the headlights; 5. Rear sunshade button: controls the opening and closing of the electric rear sunshade inside the car.

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