Transmission of radio and television signals is dealt with by the area of broadcast engineering, which has evolved to include computer engineering and information technology in recent years. Both audio engineering and radio frequency engineering, which are their own subcategories of electrical engineering, are also vital components of broadcast engineering..
Besides the studio and transmitter components (the complete airchain), broadcast engineering also includes the production of remote broadcasts. Broadcast engineers are required for every station; however, in certain cities, a single broadcast engineer may handle an entire group of stations. The engineer may work on a contract basis for one or more radio stations in a small media market, depending on the needs of the station.