RDS & Stereo Encoders

RDS (Radio Data System) is a way of sending ASCII text and other metadata to the radio display.

It encodes a 1187.5Bps data stream onto the 57Khz subcarrier (third harmonic of the 19Khz FM Stereo Pilot signal).

Stations use RDS to encode the station name, song data, program guide and traffic information.

RDS Encoders are sometimes built into the FM Audio Processor or in the FM Transmitter.
If you have an external RDS Encoder, it needs to be connected into the SCA input in your Stereo Generator or Processor.