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Communication Systems

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
20 kW
8 kW

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

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

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Communication Systems
Which of the following is used to generate PDM?

Free running multi-vibrator
JK flip-flop
Monostable multi-vibrator
Schmitt trigger

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Communication Systems
For telegraphy the most commonly used modulation system is

Two tone modulation
FSK
PCM
Single tone modulation

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Communication Systems
A zero mean white Gaussian noise is passed through an ideal low pass filter of bandwidth 10 kHz. The output of the samples so obtained would be

Statistically independent
Orthogonal
Uncorrelated
Correlated

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Communication Systems
In practical commercial FM system, channel bandwidth is

100 kHz
150 kHz
88 MHz
108 MHz

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