What does bandwidth refer to in radio transmission?

Bandwidth in radio transmission specifically refers to the range of frequencies over which the system operates. This range is crucial because it defines the limits within which a radio signal can be transmitted effectively. Different types of radio systems, whether they are used for communication, broadcasting, or data transmission, have distinct bandwidths that determine how much information they can carry and how efficiently they operate.

For instance, a larger bandwidth allows for the transmission of more data or a higher quality signal, which is particularly important for applications like digital communications and high-fidelity broadcasting. Additionally, understanding bandwidth helps in frequency allocation, ensuring that different services do not interfere with one another by using the same radio frequencies.

The other options refer to different aspects of radio transmission. The quality of the transmitted signal relates more to the signal-to-noise ratio and overall clarity. The type of modulation used refers to how the information is encoded onto the carrier signal, while the strength of the signal is associated with the amplitude and power output of the transmission rather than the frequency range.