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Communication System Basics Quiz

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Questions and Answers

What are the basic elements of a communication system according to the given text?

Modulation techniques, spectrum, carrier signal, side band modulation, MF incosivgenragletranasrema

Information source, transmitter, channel, receiver, destination (correct)

Source, amplitude modulation, noise, antenna height, line-of-sight path

Noise source, modulation, receiver, antenna, interference

What is the need for modulation in modern communication systems?

Reduce antenna height

Minimize noise

Reduce interference of signals

All of the above (correct)

How is amplitude modulation defined according to the text?

A process in which the amplitude of modulating signal varies according to the instantaneous value of carrier signal

A process in which the amplitude of carrier signal varies according to the instantaneous value of modulating signal (correct)

A process in which the frequency of carrier signal varies according to the instantaneous value of modulating signal

A process in which the phase of carrier signal varies according to the instantaneous value of modulating signal

What are the types of amplitude modulation mentioned in the text?

Double side band suppressed carrier (DSB-SC) modulation, Single side band suppressed carrier (SSB-SC) modulation, Vestigial side band (VSB) modulation Signup and view all the answers

Do modulation techniques decide the antenna height according to the text?

No, because antenna height is determined by other factors like line-of-sight path Signup and view all the answers

What does the modulation index represent in amplitude modulated wave?

The strength of the message signal present in the modulated wave Signup and view all the answers

What happens if the modulation index is too high in amplitude modulation?

The amplitude modulated wave is clipped off, causing large distortion at the receiver side Signup and view all the answers

What is Double Sideband Suppressed Carrier (DSB-SC) modulation?

A modulation technique that suppresses or eliminates the carrier and transmits only the two sidebands Signup and view all the answers

What are the advantages of DSB-SC modulation?

Significant power saving by suppressing the carrier signal and good signal to noise ratio Signup and view all the answers

What are the disadvantages of DSB-SC modulation?

Difficulty in recovering the DSB-SC signal at the receiver side and high bandwidth Signup and view all the answers