Test: Communication- 3 - Electrical Engineering (EE) MCQ
25 Questions MCQ Test Basic Electronics Engineering JE (Technical) - Test: Communication- 3
Digital modulation technique are used in ratelite communication system because
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What bandwidth is needed for an FM signal thathas a peak deviation of ± 3 kHz and handleraudio signals from 200 Hz to 5 kHz.
Main factor that determine the accuracy of areconstructed PCM signal is the
The spectrum of a band pass signal spans from 20 kHz to 30 kHz. Signal can be recoveredideally from the sampled values when sampling rate is at least
The nyquist rate for the signal x(t) = 2 cos ( 
t) cos (
t) in
Consider the two signals
x1 = 5 cos ( 
)
x2 = 2 cos ( 
) cos (
t)
The minimum sampling rate is
A single mode fibre does not suffer from which type of dispersion
What was the first commercial geostationarycommunication satelite ?
In an optical fiber, the light beam propagator dueto which one of the following ?
If the value of a resistor creating thermal noise isdoubled, the noise generated is
Which one of the following is an indirect way ofgenerating FM ?
Tropospheric scatter communication is used forwhich frequency bond ?
Why does an FM radio station perform betterthan AM station radiating the same total power?
In a PCM system, if we increase the levels from 2 to 8, how do the relative bandwidthrequirement varies ?
72. What is the reason for using frequencies of theorder of a few GHz in satelite communication ?
Which one of the following blocks is not commonin both AM ad FM receivers ?
An analog signal has significant spectralcomponents from 1 kHz to 5 kHz. What is theNyquist rate for this signal ?
A ckt producer an output y(t) = a + b x2(t) wherex(t) is its input. This ckt can produce
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25 docs|23 tests
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25 docs|23 tests
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