Exercise: Communication Systems

Questions for: Communication Systems

Which one of the following gives maximum probability of error?
A:
ASK
B:
DPSK
C:
FSK
D:
PSK
Answer: A
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In high power AM transmission modulation is done at
A:
IF stage
B:
RF power
C:
buffer stage
D:
oscillator stage
Answer: B
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In a PCM the amplitude levels are transmitted in a 7 unit code. The no. of levels is
A:
18
B:
14
C:
128
D:
64
Answer: C
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In single tone FM discriminator (S0/N0) is
A:
proportional to deviation
B:
proportional to cube of deviation
C:
proportional to square of deviation
D:
none of the above
Answer: D
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Which of the following is not advantage of FM over AM?
A:
Noise immunity
B:
Capture effect
C:
Fidelity
D:
Spluttering effect
Answer: D
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