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Four Channel Analog TDM System Scientech TechBook 2207 is a communication system where the message
signal is modulated using Pulse Amplitude Modulation and multiple access is provided using Time Division
Multiplexing. The message information is encoded in the amplitude of a series of signal pulses and
transmitted using Time Division Multiplexing (i.e. in different time slots).

The TechBook demonstrates following modes of operation between transmitter and receiver
Mode 1: 3 signals communication (Clock /Sync/Modulated Signals)
Mode 2: 2 signals communication (Sync/Modulated signals); Clock is recovered at receiver.
Mode 3: 1 signal communication (Modulated signal); Clock and Sync are recovered at receiver