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Communication Systems

Communication Systems
Which of the following is a digital modulation technique?

PCM
All
PSK
DM

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Communication Systems
PAM stands for

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

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Communication Systems
In TV systems, equalising pulses are sent during

Horizontal blanking
Vertical blanking
Serrations
Horizontal retrace

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

1280 kHz
70 kHz
35 kHz
10 kHz

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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

0.5 kW
50 kW
8 kW
20 kW

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

None of these
AM only
FM only
Both AM and FM

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