Question

what is the need of modulating a signal? will it be right approach to send the information as the signal itself.

Answer 1

Modulating a signal is required to suit the characteristics of a transmission channel.

Explanation:

"Modulation" is a method of converting data information to "radio waves" by adding detail to an electronic or "optical carrier signal". A carrier signal will be of the steady waveform, frequency, and constant height or "amplitude".

The main objective of modulation in a communication system is to make a modulated signal appropriate to the characteristics of a transmission channel. In "radio communications", modulation is required in "transmission systems" for transferring the message into applicable high frequency "radio channel".