Exercise: Communication Systems

Questions for: Communication Systems

Assertion (A): In AM, use of SSB reduces the power and bandwidth requirement

Reason (R): A balanced modulator produces AM with carrier suppressed

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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Higher order TDM levels are obtained by
A:
forming super master groups
B:
using A law
C:
using μ law
D:
dividing pulse width
Answer: D
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In a FM signal, the modulation index increases, then the power
A:
increases
B:
decreases
C:
remains constant
D:
none of the above
Answer: C
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If f is frequency and d is distance, path attenuation a between isotropic antennas is given by
A:
a = 33 + 20 log f + 20 log d
B:
a = 100 + 33 log f + 33 log d
C:
D:
Answer: A
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For a parallel two wire line with both conductors touching each other, the characteristic impedance is about
A:
300 Ω
B:
200 Ω
C:
80 Ω
D:
24 Ω
Answer: C
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