Exercise: Radio Receivers

Questions for: Radio Receivers

In a superheterodyne receiver, the IF stage has better selectivity than RF stage because
A:
of higher frequency
B:
of lower frequency
C:
of high L/C ratio
D:
of constant passband
Answer: D
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In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The image frequency at 1000 kHz will be
A:
1010 kHz
B:
1455 kHz
C:
1910 kHz
D:
545 kHz
Answer: C
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When a superheterodyne receiver is tuned to 455 kHz, its local oscillator provides a mixer with the input at 1010 kHz. The image frequency is
A:
555 kHz
B:
1010 kHz
C:
1465 kHz
D:
1920 kHz
Answer: C
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In a radio receiver, the local oscillator is always tuned to a frequency higher than the incoming frequency to
A:
facilitate tracking
B:
allow permit adequate frequency coverage without switching
C:
facilitate image frequency rejection
D:
all of the above
Answer: B
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A padder is basically a/an
A:
insulator
B:
variable resistor
C:
capacitor
D:
inductor
Answer: C
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