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Communication Systems

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

Almost equally costly
None of these
Cheaper
Costly

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Communication Systems
Which of the following does not cause losses in optical fibre cables?

Attenuation in glass
Microbending
Impurities
Stepped index operation

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Communication Systems
The main function of a balanced modulator is to

Produce balanced modulation of a carrier wave
Produce 100% modulation
Limit noise picked by a receiver
Suppress carrier signal in order to create a single-sideband or double sideband

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Communication Systems
A woofer should be fed from the input through a

Low pass filter
Band pass filter
Band stop filter
High pass filter

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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

50 kW
0.5 kW
20 kW
8 kW

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

All
DM
PSK
PCM

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