RF transceivers are electronic devices that receive and demodulate radio frequency (RF) signals, and then modulate and transmit new signals. They are used in many different video, voice and data applications. RF transceivers consist of an antenna to receive transmitted signals and a tuner to separate a specific signal from all of the other signals that the antenna receives. Detectors or demodulators extract information that was encoded before transmission. Radio techniques are used to limit localized interference and noise. To transmit a new signal, oscillators create sine waves which are encoded and broadcast as radio signals.
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