Communication Systems Quiz
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Questions and Answers

Signal attenuation is proportional to the square of the ______ between the transmitter and receiver.

distance

Noise is random, undesirable electronic energy that enters the communication system and interferes with the transmitted ______.

message

The telephone is an example of ______ duplex communication.

full

Channel bandwidth refers to the range of frequencies required to transmit the desired ______.

<p>information</p> Signup and view all the answers

Today, virtually the entire frequency spectrum between approximately 30 kHz and 300 MHz has been ______ for.

<p>spoken</p> Signup and view all the answers

Communication engineering is devoted to making the best use of that finite ______.

<p>spectrum</p> Signup and view all the answers

Spectrum management is provided by agencies set up by the United States and other countries to control ______ use.

<p>spectrum</p> Signup and view all the answers

Infrared radiation is produced by any physical equipment that generates ______, including our bodies.

<p>heat</p> Signup and view all the answers

Just above the infrared region is the visible spectrum we refer to as ______.

<p>light</p> Signup and view all the answers

Ultraviolet is not used for ______ communication.

<p>visible</p> Signup and view all the answers

Flashcards

Signal Attenuation

A measure of how much signal strength weakens as it travels from the transmitter to the receiver. It demonstrates that the signal decreases rapidly with increasing distance.

Noise in Communication

Random and unwanted electronic energy that disrupts the intended message being transmitted. It can come from various sources, such as electrical interference or natural phenomena.

Full Duplex Communication

A type of communication where both parties can transmit and receive information simultaneously. Think of a regular phone conversation where you can both speak and listen at the same time.

Channel Bandwidth

The range of frequencies needed to transmit the desired information. It determines the capacity of a communication channel to carry information.

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Spectrum Management

The allocation of specific frequencies or portions of the electromagnetic spectrum for different communication purposes. This process ensures that various communication services can operate without interfering with each other.

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Electromagnetic Spectrum

The range of frequencies that can be used for communication. This is a finite resource that needs to be managed effectively to avoid interference.

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Infrared Radiation

Electromagnetic radiation that is invisible to the human eye but can be detected as heat. It is generated by any object with a temperature above absolute zero.

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Visible Spectrum

The portion of the electromagnetic spectrum that is visible to the human eye. It gives us the ability to see colors.

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Ultraviolet Radiation

A type of electromagnetic radiation with wavelengths shorter than visible light. It is not used for visible communication because it cannot be seen by the human eye.

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