What is Transmitter?
{{no sources|date=August 2023}} [[File:WVPH Radio Tower.JPG|thumbnail|[[Radio]] transmitters on a [[tower]].]] In [[electronics]], a '''transmitter''' is a device which sends signals using [[radio wave]]s. The transmitter converts [[direct current]] (DC) into [[alternating current]] (AC) at the desired frequency. Most transmitters use a [[quartz]] crystal to set the frequency of the resulting carrier wave. A [[modulator]] modifies the carrier wave, by [[frequency modulation]] or [[amplitude modulation]] or some other kind, to include the information needed, such as an audio or video signal. The modified waves are sent by an antenna to another antenna at the receiver which extracts the information from the waves. == Other websites == * [http://www.itu.int/net/home/index.aspx International Telecommunication Union] * [http://hawkins.pair.com/radio.html Jim Hawkins' Radio and Broadcast Technology Page] {{Webarchive|url=https://web.archive.org/web/20170202194811/http://hawkins.pair.com/radio.html |date=2017-02-02 }} * [http://www.wcov.com/technical/transmitter.html WCOV-TV's Transmitter Technical Website] {{Webarchive|url=https://web.archive.org/web/20060703180950/http://www.wcov.com/technical/transmitter.html |date=2006-07-03 }} * [http://www.aerialsandtv.com/digitalnationwide.html Major UK television transmitters including change of group information, see Transmitter Planning section.] * [http://www.the-moores.co.uk/MediaGallery/Default.aspx?directory=56 Richard Moore's Anorak Zone Photo Gallery of UK TV and Radio transmission sites] {{Webarchive|url=https://archive.today/20121209120811/http://www.the-moores.co.uk/MediaGallery/Default.aspx?directory=56 |date=2012-12-09 }} [[Category:Machines]] [[Category:Radio]] {{Tech-stub}}