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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 13
36.
If f is frequency and d is distance, path attenuation a between isotropic antennas is given by
a = 33 + 20 log f + 20 log d
a = 100 + 33 log f + 33 log d
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
In a FM signal, the modulation index increases, then the power
increases
decreases
remains constant
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Higher order TDM levels are obtained by
forming super master groups
using A law
using μ law
dividing pulse width
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.

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

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

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Limiter is not essential in the following detector
foster-Seeley
ratio detector
balanced
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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