Question

What does FM stand for?

Answer 1

Frequency modulation (FM)

1. FM stands for frequency modulation.
2. Frequency modulation is an operation of encoding information on a particular signal by varying the carrier wave frequency with respect to the frequency of the modulating signal.
3. Mathematical expression for frequency modulation:
   $\mathrm{m}\left(\mathrm{t}\right)={\mathrm{A}}_{\mathrm{m}}\cos \left({\mathrm{\omega }}_{\mathrm{m}}\mathrm{t}+\mathrm{\theta }\right)$
   Where, $\mathrm{m}\left(\mathrm{t}\right)$ represents modulating signal, ${\mathrm{A}}_{\mathrm{m}}$ represents the amplitude of modulating signal, ${\mathrm{\omega }}_{\mathrm{m}}$ represents the angular frequency of modulating signal and $\mathrm{\theta }$ represents the phase of the modulating signal.
4. Frequency modulation is used widely in radio communication and broadcasting.
5. Frequency modulation causes less interference and noise.
6. Frequency modulation equipment costs higher.