What do FM and AM mean?
1 Answers
FM stands for Frequency Modulation, and AM stands for Amplitude Modulation. Here is a partial introduction: 1. FM modulates the oscillation frequency of a high-frequency carrier wave with an audio signal, forming a frequency-modulated carrier wave that varies within a certain bandwidth according to the audio signal. AM modulates the oscillation amplitude of a high-frequency carrier wave with an audio signal, forming an amplitude-modulated carrier wave enveloped by the audio signal's amplitude. 2. FM operates in the ultra-shortwave band for frequency modulation, with an international standard range of 88MHz-108MHz. It transmits via frequency modulation and has strong anti-interference capabilities. AM operates in the medium-wave band for amplitude modulation, with an international standard range of 535kHz-1605kHz. It transmits via amplitude modulation and has average anti-interference capabilities. 3. A radio station, commonly referred to as a 'station,' is a facility equipped with devices for transmitting and receiving radio signals.