Exercise: Communication Systems

Questions for: Communication Systems

In a DM system, the granular noise occurs when modulating signal
A:
decrease Rapidly
B:
increase
C:
has high frequency component
D:
change within step size
Answer: C
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In AM increased depth of modulation increases __________ and in FM with increased depth of modulation __________ increases.
A:
total transmitted power, bandwidth
B:
bandwidth, bandwidth
C:
bandwidth, total transmitted power
D:
total transmitted power, sideband power
Answer: A
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A digital watch contains
A:
quartz crystal oscillator
B:
RC oscillator
C:
LC oscillator
D:
either quartz or RC oscillator
Answer: A
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Which type of modulator amplifier is used in AM transmitter?
A:
Class A
B:
Class B
C:
Classes AB
D:
Class C with negative feedback
Answer: D
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In a CD, the depth and width of each pit is
A:
0.5 Ξm each
B:
0.5 Ξm and 1 mm respectively
C:
1 Ξm and 0.5 mm respectively
D:
1 Ξm each
Answer: C
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