Electronics and Communication Engineering - Radio Receivers

Exercise :: Radio Receivers - Section 2

1. 

Noise limiter is provided on AM receivers to

A. reduce interfering noise due to ignition system
B. reduce noise due to electrical storms
C. reduce interference due to electrical machinery
D. all of the above

Answer: Option D

Explanation:

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2. 

A low ratio of the A.C. load impedance of a diode detector results in

A. diagonal clipping
B. poor AGC operation
C. poor AF response
D. negative peak clipping

Answer: Option D

Explanation:

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3. 

A trimmer is basically a

A. insulator
B. inductor
C. capacitor
D. variable resistor

Answer: Option C

Explanation:

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4. 

In a radio receiver

A. all stages contribute equally to noise
B. RF stage has no effect on S/N ratio
C. mixer stage contributes most of the noise generated

Answer: Option C

Explanation:

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5. 

Which curve represents the fidelity curve of a standard receiver?

A. Curve A
B. Curve B
C. Curve C
D. Curve D

Answer: Option C

Explanation:

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