Exercise: Communication Systems

Questions for: Communication Systems

For real and odd signals, the Fourier series coefficient an is
A:
purely imaginary
B:
purely real and even
C:
purely imaginary and odd
D:
purely real and odd
Answer: B
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Which of the following is unlikely to happen when quantising noise is decreased in PCM?
A:
Increased bandwidth
B:
Increased channel noise
C:
Increased number of standard levels
D:
All of the above
Answer: D
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Johnson noise is
A:
white for all Practical application
B:
always white
C:
depends on temperature
D:
never white
Answer: A
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In a Vidicon camera tube, the beam current is controlled by
A:
grid G1
B:
grid G2
C:
grids G1, G2, G3
D:
grid G2, G3
Answer: A
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Vividh Bharti programme is transmitted in
A:
short wave
B:
medium frequency
C:
all of the above
D:
none of the above
Answer: C
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