Question

Why frequency fogging is used in a carrier system?

(a) to reduce noise

(b) to reduce cross talk

(c) to converge frequencies

(d) to reduce distortion

The question was posed to me during an interview.

I want to ask this question from Comparison Between FM and PM topic in division Noise of Analog Communications

Answer 1

Correct choice is (b) to reduce cross talk

Easy explanation: The interchanging of the frequencies of carrier channels to accomplish specific purposes. It is used to prevent feedback and oscillation. It is also used to reduce cross-talk and also to correct for a high frequency response slope in the transmission line.