Which of the following device was used in early TDM/PAM telemetry systems?(a) Commuter(b) Linear switch(c) Logic gates(d) DSPThis question was addressed to me in a job interview.The doubt is from Time Division Multiplexing in division Radio Transmitters, Communication Receivers, Multiplexing and Demultiplexing of Avionics

Which of the following device was used in early TDM/PAM telemetry syst

1.	Which of the following device was used in early TDM/PAM telemetry systems?(a) Commuter(b) Linear switch(c) Logic gates(d) DSPThis question was addressed to me in a job interview.The doubt is from Time Division Multiplexing in division Radio Transmitters, Communication Receivers, Multiplexing and Demultiplexing of Avionics
Answer» The correct choice is (a) Commuter Easy explanation: Multiplexers in EARLY TDM/PAM telemetry systems used a form of rotary switch known as a commutator. Multiple switch SEGMENTS were attached to the various incoming signals while a high-speed brush rotated by a DC motor rapidly SAMPLED the signals as it passed over the contacts.

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