Question

Which of the following statement is incorrect about modulation?

(a) It is used to allow the use of practical antennas

(b) It is used to separate different transmissions

(c) It is used to reduce the required bandwidth

(d) It is used to ensure that the message is transmitted over long distances

I have been asked this question in class test.

I want to ask this question from AM Receiver in portion Receivers & Transducers of Analog Communications

Answer 1

Right option is (c) It is used to reduce the required bandwidth

The explanation: Modulation is the process of varying one or more properties, like amplitude, carrier or phase, of the carrier with respect to the amplitude of the wave being propagated. It is used to separate different transmission signals and also to ensure that the message is transmitted over a long path. It is also used to allow the use of practical antennas.