What is modulation in communication systems?

PCE quizz 1

Quiz
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Science
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University
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Medium
Dr. Dharminder Singh
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Modulation in communication systems is the technique of varying a carrier signal to transmit information.
Modulation refers to the method of encoding data into a digital format.
Modulation is the process of amplifying a signal without altering its frequency.
Modulation is the technique of filtering out noise from a communication signal.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Name three common modulation methods used in communication engineering.
Quadrature Amplitude Modulation (QAM)
Amplitude Shift Keying (ASK)
Pulse Code Modulation (PCM)
Amplitude Modulation (AM), Frequency Modulation (FM), Phase Modulation (PM)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of amplitude modulation (AM)?
To increase the frequency of a signal for better reception.
To reduce noise in audio signals by filtering.
The purpose of amplitude modulation (AM) is to transmit information over radio waves by varying the amplitude of a carrier signal.
To enhance the visual quality of television broadcasts.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe the basic components of a communication system.
Encoder, Decoder, Feedback, Data
Transmitter, Channel, Receiver, Noise
Modulator, Filter, Amplifier, Signal
Source, Medium, Protocol, Message
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define the term 'carrier wave' in the context of modulation.
A carrier wave is a type of sound wave used in music.
A carrier wave is a physical object that carries electronic devices.
A carrier wave is a waveform used in modulation to carry information by varying its amplitude, frequency, or phase.
A carrier wave is a signal that only transmits data without modulation.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of a modulator in a communication system?
To amplify the carrier signal for better reception.
To filter out noise from the communication channel.
To decode the information received from the carrier signal.
The role of a modulator in a communication system is to encode information onto a carrier signal for transmission.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the concept of bandwidth in relation to modulation.
Bandwidth is the amount of data stored in a device.
Modulation is the process of increasing the power of a signal.
Bandwidth in modulation is the range of frequencies used to transmit information, affecting data transmission capacity.
Bandwidth refers to the physical size of a transmission medium.
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