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Communication Systems

Communication Systems
Full duplex operation permits transmission in both directions at the same time.

False
True

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Communication Systems
Which one of the following is analog?

Differential PCM
PWM
PCM
Delta 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

Orthogonal
Statistically independent
Correlated
Uncorrelated

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Communication Systems
A three stage telephone switching structure is to have 128 input and 128 output terminals. There are 16 first stage and 16 third stage matrices. To avoid blocking the number of intermediate paths required is

1
16
8
15

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

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

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

None of these
FM only
Both AM and FM
AM only

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