The ETB-264 Frequency Division Multiplexer/Demultiplexer Trainer is designed to provide practical experience in understanding the principles of Frequency Division Multiplexing (FDM). This educational trainer demonstrates the multiplexing of multiple input signals into a single channel and demultiplexing them back at the receiver end, using carrier frequency separation. It is equipped with independent message signal generators, modulators, and filters, making it ideal for communication system training and lab experiments in analog and digital signal processing.