engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Communication Systems Angle Modulation Frequency Modulation
Which is true in a frequency modulated system ?
1
Variation of carrier amplitude does not affect quality of reception
2
Amplitude of carrier is varied according to modulating signal
3
The transmission does not require line of sight between transmitter and reciever
4
Receiver uses diode detector