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COMMUNICATION SYSTEMS

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

False
True

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

Directional antenna
Space diversity
Frequency diversity
Broad band antenna

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Communication Systems
A buffer amplifier is

None of these
A double-tuned amplifier
A high gain D.C. amplifier
A cathode follower stage

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Communication Systems
SSB can be generated by

Filter method
Phase cancellation method
All of these
Good attenuation characteristics

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

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

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