Stereophonic Broadcasting Using Pulse-Amplitude Modulation

For transmission of the two stereo signals of a stereophonic radio broadcast, a time multiplex method operating with pulse amplitude modulation is proposed. The transmitting principle is described. The questions of compatibility, transmitter excitation, baseband width and radio band width, signal-to-noise ratio for single-channel and stereo reception, and synchronization are discussed. An account is given of the results obtained in trial workouts.