What is the primary purpose of signal generators in AV systems?

The primary purpose of signal generators in AV systems is to provide a reference signal for troubleshooting. Signal generators can produce specific types of signals, such as sine waves, square waves, or noise, which can be used to test and calibrate various components of an audio or video system. By generating these reference signals, technicians can diagnose issues, verify signal paths, check the response of speakers or monitors, and ensure that the system operates within the desired parameters. This ability is crucial for maintaining the overall performance and quality of the AV system.

The other options, while related to AV systems, do not capture the fundamental role of signal generators. Improving audio quality typically involves other components like equalizers or processors. Amplifying audio signals relates to amplifiers, which boost the strength of audio before it reaches speakers. Connecting various AV devices involves different types of connectors, switches, or routers designed for signal routing rather than generating signals. Thus, option C accurately reflects the core function of signal generators in the context of AV systems.