Question

AM-to-PM conversion brings about

(a) Amplitude variation

(b) Phase variation

(c) Frequency variation

(d) None of the mentioned

I have been asked this question in an interview for job.

My enquiry is from Noise Parameters in section Communication Link Analysis of Digital Communications

Answer 1

Right answer is (b) Phase variation

To explain I would say: AM-to-PM conversion is another common phenomenon in non linear devices. It brings about phase variation that can effect the error performance.