Introduction to Communications Systems: Understanding Noise in Communication

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What are the main barriers in communication?

Semaphores and telegraphs
Language and distance (correct)
Telephones and radios
Transmitters and receivers

Which of the following is a form of wireless communication?

Transmitter
Radio (correct)
Telegraph
Noise

What is a function of a receiver in a communication system?

Generate information
Accept transmitted message and convert it for humans (correct)
Send signals through a channel
Convert information into a signal

In a communication system, what is noise?

Undesirable electric energy that degrades transmitted information (B) Signup and view all the answers

What is the purpose of a transmitter in a communication system?

Convert information into signals suitable for transmission medium (B) Signup and view all the answers

Which element of a communication system is responsible for converting information into signals suitable for transmission?

Transmitter (B) Signup and view all the answers

What is one-way communication also known as?

Simplex (A) Signup and view all the answers

Which of the following is an example of one-way communication?

Radio broadcast (D) Signup and view all the answers

What is the purpose of telemetry in one-way communication?

To monitor the physical status of a satellite (A) Signup and view all the answers

Which of the following is NOT an example of one-way communication?

Telephone conversation (A) Signup and view all the answers

What distinguishes one-way communication from two-way communication?

The direction of information flow (D) Signup and view all the answers

Which of the following statements about one-way communication is true?

It is suitable for applications where feedback is not required (C) Signup and view all the answers

Which of the following best describes an analog signal?

A signal with continuously varying amplitude, such as sine waves (D) Signup and view all the answers

What is the purpose of modulation in communications systems?

To modify a baseband signal with a higher frequency carrier signal (A) Signup and view all the answers

What is the term used for the process of transmitting two or more signals over the same channel?

Multiplexing (B) Signup and view all the answers

Which type of communication is represented by a baseband signal being transmitted directly into the medium?

One-way communication (B) Signup and view all the answers

What is the relationship between frequency and wavelength of an electromagnetic wave?

$\lambda = 300/f$, where $f$ is in megahertz (C) Signup and view all the answers

Which of the following best describes a digital signal?

An on-off coded signal (C) Signup and view all the answers

What is the term used for the entire range of frequencies in the electromagnetic spectrum?

Electromagnetic spectrum (A) Signup and view all the answers

Which of the following statements about electromagnetic waves is true?

They are composed of both electric and magnetic fields (A) Signup and view all the answers

What is the process of converting an analog signal to a digital signal called?

Digitization (B) Signup and view all the answers

Which type of communication allows for simultaneous two-way transmission?

Full-duplex communication (D) Signup and view all the answers