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Communication Systems

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

True
False

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Communication Systems
FM transmitting and receiving equipment as compared to AM equipment is

None of these
Costly
Almost equally costly
Cheaper

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

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

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Communication Systems
PAM stands for

Pulse Analogue Modulation
Phase Amplitude Modulation
Pulse Amplitude Modulation
Phase Analogue Modulation

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Communication Systems
The maximum power output of a standard A earth station over the total band allocated to satellite communication is about

20 kW
0.5 kW
50 kW
8 kW

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Communication Systems
In a TV receiver antenna the length of reflector rod

May be equal, more or less than that of dipole
Is more than that of dipole
Is less than that of dipole
Is the same as that of dipole

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