Question

When phase noise and phase jitter is doubled, the phase variance increases by

(a) Two times

(b) Four times

(c) 0.5 times

(d) 8 times

This question was addressed to me in homework.

I want to ask this question from Receiver Synchronization in division Synchronization of Digital Communications

Answer 1

Correct option is (b) Four times

The best explanation: In PLL, when the phase jitter and phase noise increases by 2, the phase variance increases by 4 than that of the original signal.