Exercise: Communication Systems

Questions for: Communication Systems

The primary colours are
A:
blue and green
B:
blue and red
C:
red and green
D:
blue, red and green
Answer: D
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Assertion (A): The unit of telephone traffic measurement is erlang.

Reason (R): International circuits for communication are fitted with echo suppressors.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is correct but R is wrong
D:
A is wrong but R is correct
Answer: B
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In TV system in India IF video and IF audio frequencies are
A:
33.4 and 28.4 MHz respectively
B:
38.9 and 33.4 MHz respectively
C:
43.8 and 38.9 MHz respectively
D:
33.4 and 38.9 MHz respectively
Answer: B
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A circuit which cannot demodulate SSB is
A:
balanced modulator
B:
product detector
C:
BFO
D:
phase discriminator
Answer: D
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If Pk be the probability of the message to be received or transmitted, then the amount of information (Ik) associated, in bits, will be
A:
Ik = log2 Pk
B:
C:
D:
Answer: D
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