In what scenarios would a technician use a spectrum analyzer?

A technician would use a spectrum analyzer particularly in scenarios involving diagnosing interference or signal quality issues in wireless networks. This tool is critical for visualizing the frequency spectrum and identifying undesired signals or noise that could disrupt communication, which is essential for maintaining a reliable network.

In this context, the spectrum analyzer provides valuable information about signal strength across various frequencies, allowing technicians to pinpoint sources of interference such as other wireless devices, electronic equipment, or overlapping channels. This insight helps in troubleshooting connectivity problems and optimizing network performance.

While the other options describe tasks relevant to networking and cabling, they do not specifically involve the unique capabilities of a spectrum analyzer, which is designed to analyze and interpret frequency-related issues rather than measure physical lengths, assess connection speeds, or perform site surveys.