Exercise: Communication Systems

Questions for: Communication Systems

To eliminate ghosts in the picture
A:
use a longer transmission line
B:
connect a booster
C:
change the antenna orientation of location
D:
twist the transmission line
Answer: C
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If output power of a radio receiver is doubled, its volume is increased by __________ dB.
A:
2
B:
3
C:
1
D:
-3
Answer: B
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Human ear can detect sound intensities of the order of
A:
10-4 W/m2
B:
10-8 W/m2
C:
10-13 W/m2
D:
10-18 W/m2
Answer: C
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Waveform shown in figure is that for
A:
FM
B:
PCM
C:
AM-DSB
D:
AM-SSB
Answer: C
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In Pulse Code Modulation system
A:
large bandwidth is required
B:
quantising noise can be overcome by companding
C:
quantising noise can be reduced by decreasing the number of standard levels
D:
suffers from the disadvantage of its incompatibly with TDM
Answer: A
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