What does the term “bandwidth” indicate in relation to radio frequencies?

• A. The range of frequencies occupied by a signal
• B. The amount of audio data transmitted per second
• C. The type of modulation used for transmission
• D. The total power output of a transmitter

Answer: (A)

The term “bandwidth” refers specifically to the range of frequencies that a signal occupies in the radio spectrum. It is a crucial concept in radio communications because it defines the width of the frequency range that can be used for transmitting a specific signal. For example, if a signal occupies frequencies from 100 MHz to 102 MHz, its bandwidth would be 2 MHz. This range affects how well the signal can be transmitted and received, as it determines the capacity for data transfer as well as the potential for interference with other signals.

While other concepts like the amount of audio data transmitted per second, the type of modulation used, and the total power output of a transmitter are all important in the context of radio communications, they do not define bandwidth itself. Instead, they represent different characteristics and capabilities related to the transmission and reception of radio signals.