Exercise: Radio Receivers

Questions for: Radio Receivers

A receiver having an RF amplifier and an IF of 450 kHz, has Q of the coils 65 and an incoming frequency of 1200 kHz. The image rejection of the receiver is
A:
5870
B:
3655
C:
236
D:
13.3
Answer: C
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In a FM waveform, the side bands are spaced at intervals equal to
A:
four times the modulating frequency
B:
twice the modulating frequency
C:
half the modulating frequency
D:
modulating frequency
Answer: C
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Power spectral density of white noise
A:
is constant with frequency
B:
increases with frequency
C:
decreases with frequency
D:
none
Answer: A
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In radio receiver, the maximum contribution to noise is from
A:
mixer stage
B:
power supply
C:
power amplifier
D:
equally from above three
Answer: C
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The sensitivity of a superheterodyne receiver is determined by
A:
the gain IF amplifier
B:
the gain of RF amplifier
C:
the noise figure
D:
all of the above
Answer: D
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