In broadcasting, what does the term "bandwidth" refer to?

The term "bandwidth" in broadcasting specifically refers to the range of frequencies utilized to transmit a broadcast signal. It is a crucial concept in telecommunications and broadcasting, as it determines how much information can be transmitted over a channel within a specific time frame. Bandwidth is measured in hertz (Hz) and dictates the capacity of the transmission medium; broader bandwidth allows for higher data rates and the ability to carry more information, such as multiple audio or video streams within a signal.

The other options do not accurately define 'bandwidth' within the context of broadcasting. For instance, the maximum power a transmitter can output relates to the strength of the transmitted signal, which is a separate issue concerning transmission quality and reach. Quality of audio signals pertains to clarity and fidelity rather than the frequency range itself. Lastly, while the number of channels available in a broadcasting spectrum does relate to how bandwidth can be allocated, it doesn't capture the essence of what bandwidth truly signifies. Each of these aspects plays a role in broadcasting but does not define the specific term "bandwidth."