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Communication Systems

Communication Systems
If sampling is done at the rate of 10 kHz. The bandwidth required is

35 kHz
10 kHz
70 kHz
1280 kHz

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Communication Systems
What is the purpose of peak clipper circuits in radio transmitters?

To regulate oscillator I/P voltage
To reduce bandwidth
To prevent overmodulation
To increase bandwidth

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Communication Systems
Which of the following is an indirect way of generating FM?

Reactance FET modulator
Varactor diode modulator
Armstrong modulator
Reactance bipolar transistor

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

Broad band antenna
Space diversity
Directional antenna
Frequency diversity

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Communication Systems
The colour of an object is decided by

None of these
The wavelength transmitted through it
Reflected colour for opaque object and wavelength transmitted through it for transparent objects
The reflected colour

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Communication Systems
As per Shannon-Hartley theorem, a noise less Gaussian channel has

Zero capacity
Small capacity
Infinite capacity
None of these

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