The Time Division Multiplexing (TDM) is a method to use the same transmitting channel to transmit messages coming from different sources as its input. The number of message channels that a TDM system can handle successfully depends on the cycle frequency of the TDM switcher. In order to have loss-less transmission of all the messages, the switching frequency of the TDM system, must be much higher switching frequency than, any of the message signal frequencies. This illustrates how time division multiplexing takes place.

This TDM trainer can handle two message channels. This trainer has built in pulse generator, which is used as TDM switch for time division multiplexing. Two different message signals must be connected as input to this TDM trainer from external function generator of 1 KHz. The message signals can be SINE, SQUARE, RAMP etc. An external oscilloscope is an important requisite for the experiment. This trainer has blocks consisting of clock generator, Channel selector, time division multiplexer, in addition to built-in power supplies. The necessary connections are established using 22SWG wire patch-cords.