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Communication Systems

Communication Systems
If output power of a radio receiver is doubled, its volume is increased by __________ dB.

2
-3
1
3

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Communication Systems
Fourier analysis indicate that a square wave can be represented as

A fundamental sine wave and even harmonics
Fundamental and subharmonic sine waves
A fundamental sine wave and odd harmonics
A fundamental sine wave and harmonics

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Communication Systems
In TV systems, equalising pulses are sent during

Horizontal blanking
Vertical blanking
Horizontal retrace
Serrations

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Communication Systems
For attenuation of high frequencies we should use

Shunt capacitance
Inductance
Series capacitance
Resistance

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Communication Systems
Which of the following does not cause losses in optical fibre cables?

Impurities
Attenuation in glass
Stepped index operation
Microbending

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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

Statistically independent
Orthogonal
Uncorrelated
Correlated

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