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Communication Systems

Communication Systems
Full duplex operation permits transmission in both directions at the same time.

True
False

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Communication Systems
A telephone channel requires a bandwidth of about

50 kHz
10 kHz
3 kHz
1 kHz

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Communication Systems
It is found that a ship to ship communication suffers from fading. This can be avoided by using

Frequency diversity
Directional antenna
Broad band antenna
Space diversity

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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
Fourier analysis indicate that a square wave can be represented as

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

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Communication Systems
Under ordinary circumstances, impulse noise can be reduced in

Both AM and FM
FM only
None of these
AM only

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