What is the name of the microwave radio system that connects the studio audio output to the transmitter's audio input when the studio and transmitter sites are not in the same location?

The studio-to-transmitter link (STL) is a specialized system designed to facilitate the transmission of audio signals from a studio to a transmitter, particularly when these two locations are separated by a significant distance. This system is essential for broadcasting, as it allows for the delivery of high-quality audio signals over microwave frequencies, which are capable of transmitting data quickly and effectively without the degradation that can occur with longer wired connections.

Microwave links utilized in STLs can transmit audio, and sometimes other forms of data, over radio waves, taking advantage of the frequency spectrum suitable for long-range communication. This is crucial in broadcasting environments where physical wiring is impractical or too costly.

Other options, while they may relate to audio transmission in some capacity, do not specifically denote a system dedicated to linking studio audio outputs to transmitter inputs. The correct term for this setup is universally recognized as a studio-to-transmitter link (STL), which clarifies its specific role and function in the broadcasting chain.