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Communication Systems

Communication Systems
As per Shannon-Hartley theorem, a noise less Gaussian channel has

Small capacity
None of these
Infinite capacity
Zero capacity

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

Varactor diode modulator
Reactance bipolar transistor
Armstrong modulator
Reactance FET modulator

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Communication Systems
If sampling is done at the rate of 10 kHz. The bandwidth required is

70 kHz
1280 kHz
35 kHz
10 kHz

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

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

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Communication Systems
A telephone channel requires a bandwidth of about

50 kHz
10 kHz
1 kHz
3 kHz

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

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

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