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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 22
46.
The PAM Signal can be detected by
Band pass filter
Band stop filter
High pass filter
Low pass filter
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
FM is named so because
it restrains the frequency excursions of FM
it increases the frequency excursions of FM
it decreases the amplitude of FM signal
it increases the amplitude of FM signal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
Which statement is incorrect for the signal x(t) = 5 sin (2p x 103t) sin (2p x 106t)?
Upper side band frequency is 1001000
Carrier amplitude is 5
Lower sideband frequency is 990000
x(t) is DSB-SC
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
In radio receivers, the value of IF is
100 kHz
225 kHz
455 kHz
850 kHz
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
If F(ω) is Fourier transform of f(t), then Fourier transform of f(t) cos2 ωct is
F(ω) + [F(ω + 2ωc) + F(ω - 2ωc)]
F(ω) + [F(ω + 2ωc) + F(ω - 2ωc)]
F(ω) - [F(ω + 2ωc) + F(ω - 2ωc)]
F(ω) - [F(ω + 2ωc) + F(ω - 2ωc)]
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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