Frequency modulation: Difference between revisions
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imported>Howard C. Berkowitz (New page: {{subpages}} '''Frequency modulation (FM)''' is a technique for imposing information onto a electromagnetic signal of constant frequency -- the "carrier wave" -- by changing the frequency...) |
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'''Frequency modulation (FM)''' is a technique for imposing information onto a electromagnetic signal of constant frequency -- the "carrier wave" -- by changing the frequency in proportion to the instantaneous strength of the information signal to be transmitted via FM. | '''Frequency modulation (FM)''' is a technique for imposing information onto a electromagnetic signal of constant frequency -- the "carrier wave" -- by changing the frequency in proportion to the instantaneous strength of the information signal to be transmitted via FM. | ||
For audio broadcasting, FM is much preferred to [[amplitude modulation]] due to its much greater ability to reject noise. Since noise is random, it can reinforce the instanteous amplitude of an AM signal, but a random noise spike has very little effect on FM. | For audio broadcasting, FM is much preferred to [[amplitude modulation]] due to its much greater ability to reject noise. Since noise is random, it can reinforce the instanteous amplitude of an AM signal, but a random noise spike has very little effect on FM.[[Category:Suggestion Bot Tag]] | ||
Latest revision as of 07:01, 19 August 2024
Frequency modulation (FM) is a technique for imposing information onto a electromagnetic signal of constant frequency -- the "carrier wave" -- by changing the frequency in proportion to the instantaneous strength of the information signal to be transmitted via FM.
For audio broadcasting, FM is much preferred to amplitude modulation due to its much greater ability to reject noise. Since noise is random, it can reinforce the instanteous amplitude of an AM signal, but a random noise spike has very little effect on FM.