Ham Radio Extra Class Practice Test 2025 - Free Extra Class License Exam Questions and Study Guide

Question: 1 / 400

What does the term "bandwidth" refer to in radio communications?

The amount of power used by the transmitter.

The range of frequencies occupied by a signal.

The term "bandwidth" in radio communications refers to the range of frequencies that a signal occupies. It is a critical concept because it determines how much information can be transmitted over a given frequency range at any one time. Bandwidth is typically measured in hertz (Hz) and represents the difference between the highest and lowest frequencies in the signal.

In radio systems, a greater bandwidth allows for a higher data rate and more complex modulation schemes, enabling transmission of more information. For example, a voice transmission may require narrower bandwidth than a video signal, which consumes a larger bandwidth due to the amount of data being sent.

Thus, understanding bandwidth is essential for optimizing communication systems, managing interference, and ensuring efficient use of the available frequency spectrum.

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The distance a signal can travel.

The number of channels available in a frequency band.

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