RF Modulator (Paperback)

High Quality Content by WIKIPEDIA articles! An RF modulator (or radio frequency modulator) is a device that takes a baseband input signal and outputs a radio frequency-modulated signal. This is often a preliminary step in transmitting signals, either across open air via an antenna or transmission to another device such as a television. In order to display picture information on early analog televisions, the data must be modulated, or conditioned, to the format that the television expects. TVs were designed to only accept signals through the aerial connector: signal originate at a TV station, are transmitted over the air, and then received by an antenna and fed into the TV.