Question

Write the functions of the following in communication systems:
(i) Modulator,
(ii) Demodulator

Answer 1

(I) Modulator: It is a device in which amplitude of a high frequency carrier wave is made to change in accordance with the amplitude of message/information signal during superposition.
(ii) Demodulator: It is a device used to retrieve information/message signals from the carrier wave at the receiver.