If an FM signal is modulated by a single frequency sine wave, what it the result of limiting the bandwidth? Is it increased distortion of the demodulated signal? Theoretically, the number of sidebands is infinite. In the real world, the bandwidth is limited so that the higher order sidebands are greatly attenuated. Regards, Jon
The result is a signal that is both frequency and amplitude modulated. The amount of distortion depends on the receiver technology, but in general yes, it'll be distorted.
-- Tim Wescott Wescott Design Services http://www.wescottdesign.com Posting from Google? See http://cfaj.freeshell.org/google/ "Applied Control Theory for Embedded Systems" came out in April. See details at http://www.wescottdesign.com/actfes/actfes.html
For D > m the effective bandwidth is approximately 2 * (D+m) where D is the p-p deviation and m is the frequency of the modulating signal.
-- JosephKK Gegen dummheit kampfen die Gotter Selbst, vergebens. --Schiller
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.