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Communication Systems

Communication Systems
For attenuation of high frequencies we should use

Shunt capacitance
Inductance
Resistance
Series capacitance

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Communication Systems
Which one of the following is analog?

PCM
Delta modulation
Differential PCM
PWM

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Communication Systems
To eliminate ghosts in the picture

Change the antenna orientation of location
Use a longer transmission line
Connect a booster
Twist the transmission line

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

Cheaper
None of these
Almost equally costly
Costly

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Communication Systems
Which of the following is an indirect way of generating FM?

Varactor diode modulator
Reactance FET modulator
Armstrong modulator
Reactance bipolar transistor

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Communication Systems
One of the advantages of base modulation over collector modulation of a transistor class C amplifier is

High power output per transistor
Better linearity
Improved efficiency
The lower modulating power requirement

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