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Electronics and Communication Engineering - Radio Receivers

Exercise : Radio Receivers - Section 2
16.
In a superheterodyne receiver, the IF stage has better selectivity than RF stage because
of higher frequency
of lower frequency
of high L/C ratio
of constant passband
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
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
AM-DSB signal with suppressed carrier
AM-DSB signal with carrier
AM-SSB signal with carrier
a sequence of exponentially decaying sine waves
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
The purpose of incorporating a pre-selector stage in a receiver is to
provide higher selectivity
provide higher fidelity
improve linearity
larger passband
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Vividh Bharati programme is transmitted in
short wave
medium frequency
very high frequency
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The image frequency of a superheterodyne receiver is
independent of the frequency at which the receiver is tuned
always outside the operating range of the receiver
typical to FM receivers only
not rejected by the IF tuned circuits
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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