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Question

Attenuation is a measure of

A
Speed at which signal travels down a communication medium
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B
Amount of loss of signal when it travels down a communication medium
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C
Amount of phase shift as signal travels down a communication medium
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D
Cost of communication medium
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Solution

The correct option is B Amount of loss of signal when it travels down a communication medium

Attenuation is a measure of Amount of loss of signal when it travels down a communication medium.

Attenuation is a reduction of signal strength during transmission, such as when sending data collected through automated monitoring. Attenuation is represented in decibels (dB), which is ten times the logarithm of the signal power at a particular input divided by the signal power at an output of a specified medium.

Attenuation is a general term that refers to any reduction in the strength of a signal. Attenuation occurs with any type of signal, whether digital or analog. Sometimes called loss, attenuation is a natural consequence of signal transmission over long distances.

Attenuation is a general term that refers to any reduction in the strength of a signal. Sometimes called loss, attenuation is a natural consequence of signal transmission over long distances. The extent of attenuation is usually expressed in units called decibels (dBs).

In optical fibers, attenuation is the rate at which the signal light decreases in intensity. For this reason, glass fiber (which has a low attenuation) is used for long-distance fiber optic cables; plastic fiber has a higher attenuation and, hence, shorter range.


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