What is the primary function of a transmitter?

The primary function of a transmitter is to transmit radio or television signals. A transmitter is a device that converts electrical signals into radio waves, which can then be broadcast over the air or sent through a communication medium. This process involves modulating the electronic signals so that they can be effectively sent over long distances to receivers, which then decode the signals back into information such as audio or visual content. Understanding the role of a transmitter is fundamental in the context of communication systems, as it is crucial for facilitating the transfer of information from one point to another. The other options relate to functions that do not capture the essence of what a transmitter does, as they involve receiving, amplifying, or decoding signals, which are performed by different devices or components in the communication process.