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Communication Systems

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

Costly
Almost equally costly
Cheaper
None of these

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Communication Systems
A modem is classified as low speed if data rate handled is

Upto 100 bps
Upto 250 bps
Upto 600 bps
Upto 400 bps

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Communication Systems
Fourier analysis indicate that a square wave can be represented as

A fundamental sine wave and even harmonics
Fundamental and subharmonic sine waves
A fundamental sine wave and odd harmonics
A fundamental sine wave and harmonics

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

Varactor diode modulator
Reactance bipolar transistor
Reactance FET modulator
Armstrong modulator

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

AM only
FM only
None of these
Both AM and FM

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Communication Systems
In Modulation, “carrier” is

Speech voltage to be transmitted
Resultant wave
Voltage for which frequency, phase or amplitude is varied
Voltage with constant frequency, phase or amplitude

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