Exercise: Radio Receivers

Questions for: Radio Receivers

Which are the popular IF frequencies for microwave and radar receivers operating on frequencies in the range 1 to 10 GHz
A:
30, 60 and 70 kHz
B:
3, 6 and 7 kHz
C:
30, 60 and 70 MHz
D:
3, 6 and 7 GHz
Answer: C
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The sensitivity curve of a standard receiver is represented by
A:
curve A
B:
curve B
C:
curve C
D:
curve D
Answer: C
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RF amplifiers are used in radio receivers for
A:
improved image frequency rejection
B:
improved rejection of adjacent unwanted signals
C:
prevention of re-radiation of the local oscillator through the antenna of the receiver
D:
all of the above
Answer: D
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A heterodyne frequency changer is called a
A:
Modulator
B:
Mixer
C:
Demodulator
D:
Frequency translator
Answer: B
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A duplexer is a device used to
A:
feed more than one receiver from a single antenna
B:
connect two transmitters to the same antenna
C:
connect a receiver and a transmitter to the same antenna
D:
none of these
Answer: C
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