Emergency Telecommunicator Certification Practice Exam

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How is frequency band or bandwidth measured?

In amplitude (A)
In decibels (dB)
In hertz (Hz)
In kilohertz (kHz)

The correct answer is: In hertz (Hz)

Frequency band or bandwidth is measured in hertz (Hz), which quantifies the number of cycles per second of a periodic wave. In telecommunications, this measurement indicates how much spectrum is available for transmitting signals. Bandwidth indicates the range of frequencies within a given band, which is essential for determining the channel capacity and quality of communication systems. Using hertz gives a direct measure of the frequency at which signals operate, allowing for a clear understanding of the capabilities of a communication channel. While kilohertz (kHz) can also represent frequency but specifically denotes a frequency in thousands of hertz, it is essentially a scaled version of hertz. Amplitude and decibels measure different aspects of a signal rather than its frequency, making those units irrelevant for measuring bandwidth directly.