railway RRB JE (CBT I + CBT II) Mock Test 2024 Communication Systems Angle Modulation Maximum Phase Deviation
Which of the following statements w.r.t. FSK demodulation using PLL circuit is/are correct?
S1: If the input signal frequency changes, the PLL adjusts its frequency output to match the input frequency.
S2: The phase-locked loop is used to track the changes in the frequency of the modulated signal.
1
Only S1
2
Only S2
3
Neither S1 nor S2
4
Both S1 and S2