In a communication system, what is the purpose of a transceiver?

A transceiver combines the functions of a transmitter and receiver into a single device, allowing for efficient two-way communication. This integration is essential in many modern communication systems, such as radios and mobile devices, where bidirectional communication is necessary. By having both transmission and reception capabilities in one unit, it simplifies the design and operation of communication systems, making them more compact and versatile.

The other options highlight distinct functions in communication systems but do not encapsulate the primary role of a transceiver. Amplifying received signals is an important function for improving signal clarity, while converting audio frequencies into radio frequencies pertains to the modulation process in transmitters. Standardizing communication protocols is crucial for ensuring interoperability between different systems but does not relate to the fundamental hardware functions of a transceiver.