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Communication Systems

Communication Systems
A woofer should be fed from the input through a

Low pass filter
High pass filter
Band pass filter
Band stop filter

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Communication Systems
VSB modulation is preferred in TV because

It results in better reception
None of these
It avoids phase distortion at low frequencies
It reduces the bandwidth requirement to half

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Communication Systems
Skip distance depends on time of day and angle of incidence.

True
False

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Communication Systems
To eliminate ghosts in the picture

Use a longer transmission line
Twist the transmission line
Change the antenna orientation of location
Connect a booster

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Communication Systems
Leak type bias is used in plate modulated class C amplifier to

Prevent over modulation
Prevent tuned circuit damping
Increase the bandwidth
Prevent excessive grid current

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Communication Systems
A zero mean white Gaussian noise is passed through an ideal low pass filter of bandwidth 10 kHz. The output of the samples so obtained would be

Orthogonal
Correlated
Uncorrelated
Statistically independent

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