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Broadcast Radio Stereo Generator, or Stereo Encoder: In broadcast radio, a stereo generator is a device used to generate the stereo audio signal that is broadcast over the airwaves. The signal generated is a Composite Stereo Signal. The composite stereo signal is then modulated onto the FM carrier by the broadcast exciter.Broadcast Radio Stereo Generator, or Stereo Encoder: In broadcast radio, a stereo generator is a device used to generate the stereo audio signal that is broadcast over the airwaves. The signal generated is a Composite Stereo Signal otherwise known as an MPX (multiplex) signal. The composite stereo signal is then modulated onto the FM carrier by the broadcast exciter.MPX output / Composite Stereo Signal may include:*Baseband Audio: The left and right stereo audio channels. (required to be composite stereo) *Pilot Tone: A constant 19 kHz tone that serves as a reference for stereo receivers to properly decode the stereo signal (required for FM exciter)*RDS Signal: Data encoded according to the Radio Data System standard, providing additional information such as station identification, program information, traffic alerts, etc. (optional)*Subsidiary Communications Authorization (SCA): If applicable, SCA signals may also be included in the MPX output. SCA allows broadcasters to transmit additional content such as background music, foreign-language programming, or data services. (optional)The MPX output is typically transmitted from the FM transmitter to the broadcast antenna, where it is radiated over the airwaves. Receivers equipped with stereo capabilities and RDS decoders can then demodulate and decode the MPX signal to reproduce the stereo audio and access additional information provided by the RDS.[[Category:Electronics]][[Category:Radio]][[Category:Micro Broadcasting]]