Radio Receivers MCQ Questions & Answers | ECE

A. The noise limiter cuts off the receiver’s output during a noise pulse.

B. A product demodulator could be used for the reception of Morse code.

C. Double conversion is used to improve image rejection

D. Variable sensitivity is used to eliminate selective fading

A. Provide improved tracking

B. Permit better adjacent-channel rejection

C. Increase the tuning range of the receiver

D. Improve the rejection of the image frequency

A. Reduce the spurious frequency problem

B. Increase the frequency stability of the synthesizer

C. Reduce the number of decades

D. Reduce the number of crystals required

A. Is created within the receiver itself

B. Is due to insufficient adjacent channel rejection

C. Is not rejected be the IF tuned circuits

D. Is independent of the frequency to which the receiver is tuned

A. Local oscillator operates below the signal frequency

B. Mixer input must be tuned to the signal frequency

C. Local oscillator frequency is normally double the IF

D. RF amplifier normally works at 455 kHz above the carrier frequency