Exercise: Communication Systems

Questions for: Communication Systems

The oscillator frequency is set for
A:
best picture
B:
max. sound
C:
min. sound
D:
sound in picture
Answer: A
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In pulse code modulation when the maximum frequency in the signal is fmax the bandwidth required will be
A:
≤ p.fmax
B:
≥ p.fmax
C:
≤ (p.fmax)2
D:
≥ (p.fmax)2
Answer: B
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If the AF voltage is raised to 10 V, while the AM is dropped to 200 Hz, what is the deviation?
A:
10 kHz
B:
15 kHz
C:
20 kHz
D:
40 kHz
Answer: C
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Which of the following is Doppler effect not used?
A:
CW radar
B:
FM radar
C:
MTI system
D:
Moving target plotting on PPI
Answer: D
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Pre-emphasis and De-emphasis is done by using R-C circuit.
A:
True
B:
False
C:
D:
Answer: A
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