Exercise: Radio Receivers

Questions for: Radio Receivers

The IF stage of a receiver employs
A:
capacitive coupling
B:
impedance coupling
C:
double-tuned transformer coupling
D:
single-tuned transformer coupling
Answer: C
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In a receiver, which of the following device has RF input but IF output?
A:
Loudspeaker
B:
Frequency changer
C:
Demodulator
D:
Audio amplifier
Answer: B
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Vividh Bharati programme is transmitted in
A:
short wave
B:
medium frequency
C:
very high frequency
D:
all of the above
Answer: B
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The purpose of incorporating a pre-selector stage in a receiver is to
A:
provide higher selectivity
B:
provide higher fidelity
C:
improve linearity
D:
larger passband
Answer: A
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An arbitrary signal m (t) has zero average value and it is bandlimited to 3.2 kHz. It is sampled at the rate of 8 K samples/S. The samples are passed through an ideal bandpass filter with centre frequency of 32 kHz and bandwidth of 6.4 kHz. The output of band pass filter is
A:
AM-DSB signal with suppressed carrier
B:
AM-DSB signal with carrier
C:
AM-SSB signal with carrier
D:
a sequence of exponentially decaying sine waves
Answer: B
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