Exercise: Radio Receivers

Questions for: Radio Receivers

In a broadcast superheterodyne receiver
A:
the local oscillator operates below the signal frequency
B:
local oscillator frequency is normally double the IF
C:
RF amplifier normally works at kHz above the carrier frequency
D:
mixer input must be tuned to the signal frequency
Answer: D
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Most popular IF for receivers tuning to 540 to 1650 kHz is
A:
433 kHz
B:
455 kHz
C:
545 kHz
D:
555 kHz
Answer: B
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Which of the following should be used in order to prevent overloading or the last IF amplifier in a receiver?
A:
Variable selectivity
B:
Variable sensitivity
C:
Double conversion
D:
Squelch
Answer: B
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The function of an AM detector circuit is to
A:
rectify the input signal
B:
discard the carrier
C:
provide audio signal
D:
all of the above
Answer: D
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