railway RRB JE (CBT I + CBT II) Mock Test 2024 Communication Systems Angle Modulation Frequency Modulation
In a PLL-based FM demodulator, the output of the phase detector is proportional to _______.
1
the carrier frequency of the FM signal
2
the amplitude of the FM signal
3
the frequency deviation of the FM signal
4
the phase difference between the FM signal and the VCO output