Exercise: Radio Receivers

Questions for: Radio Receivers

Which curve represents the fidelity curve of a standard receiver?
A:
Curve A
B:
Curve B
C:
Curve C
D:
Curve D
Answer: C
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A trimmer is basically a
A:
insulator
B:
inductor
C:
capacitor
D:
variable resistor
Answer: C
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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: D
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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: D
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Which of the following statement about the amplitude limiter is not valid?
A:
Leak type bias must be used
B:
Output must be tuned
C:
The circuit is always biased in class C, by virtue of the leak type bias
D:
When the input increases past the threshold of limiting, the gain decreases to keep the output constant
Answer: C
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