Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications , radio broadcasting , signal processing , and computing .
What is frequency modulation, FM? To generate a frequency modulated signal, the frequency of the radio carrier is changed in line with the amplitude of the incoming audio signal. Frequency Modulation, FM . When the audio signal is modulated onto the radio frequency carrier, the new radio frequency signal moves up and down in frequency.
Frequency Modulation (FM) Contents Slide 1 Frequency Modulation (FM) Slide 2 FM Signal Definition (cont.) Slide 3 Discrete-Time FM Modulator Slide 4 Single Tone FM Modulation Slide 5 Single Tone FM (cont.) Slide 6 Narrow Band FM Slide 7 Bandwidth of an FM Signal Slide 8 Demod. by a Frequency Discriminator Slide 9 FM Discriminator (cont.)
FM technology in a movie or theater setting allows you to use your hearing aid with an FM receiver, and the signal goes straight through to the device so that the sound is clear. For those who don't wear hearing aids, FM systems paired with traditional headsets may be available for you to wear during the show. Don't be shy—ask at the box office.
When you listen to a radio station and the announcer says, You are listening to 91.5 FM WRKX The Rock!, what the announcer means is that you are listening to a radio station broadcasting an FM radio signal at a frequency of 91.5 megahertz, with FCC-assigned call letters of WRKX. Megahertzband of frequencies between 88 megahertz and 108.
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