What is the primary function of a repeater in a communication system?

The primary function of a repeater in a communication system is to amplify signals. A repeater receives a weak or degraded signal, enhances its strength, and then retransmits that signal over a longer distance or into areas where the original signal could not reach effectively. This amplification is crucial in wireless communication, as it allows for greater coverage and improved signal quality, especially in environments where physical obstructions or distance would otherwise diminish the signal strength.

While other functions like converting, filtering, or demodulating signals are essential in different contexts within communication systems, they do not accurately describe the main role of a repeater. The focus is specifically on amplifying the signal to ensure reliable communication over longer distances.