Ham Radio Extra Class Practice Test 2026 - Free Extra Class License Exam Questions and Study Guide

The term "bandwidth" in radio communication specifically refers to the range of frequencies that a signal occupies. This is an essential concept in understanding how different signals can coexist in the radio spectrum without causing interference. Bandwidth is measured in hertz (Hz) and determines the data-carrying capacity of a given signal; for instance, a wider bandwidth can accommodate more information at a faster rate.

Since a signal can span over a certain range of frequencies, it is crucial for effective communication, as it affects aspects such as signal quality and data rates. In contrast, the other choices focus on different aspects of radio communication and do not accurately describe bandwidth. Total power output pertains to the strength of the signal, the geographic range concerns how far a signal can travel, and the number of people using the same frequency relates to frequency allocation and interference issues, none of which define the concept of bandwidth itself.