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COMMUNICATION SYSTEMS

Communication Systems
A telephone channel requires a bandwidth of about

1 kHz
50 kHz
3 kHz
10 kHz

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

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

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

70 kHz
10 kHz
1280 kHz
35 kHz

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

Reactance bipolar transistor
Varactor diode modulator
Armstrong modulator
Reactance FET modulator

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Communication Systems
In practical commercial FM system, channel bandwidth is

88 MHz
150 kHz
100 kHz
108 MHz

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