What is the purpose of a spectrum analyzer in wireless site surveys?

• A. To visualize the RF spectrum, detect interference, and measure channel occupancy and noise levels
• B. To measure only data throughput
• C. To determine device battery consumption
• D. To control AP firmware updates

Answer: (A)

Visualizing the RF spectrum, detecting interference, and measuring how a channel is being used and how loud the environment is. A spectrum analyzer shows all signals across the frequency range, so you can see which parts of the spectrum are occupied, how strong different signals are, and when interference appears. This lets you spot crowded channels, non‑Wi‑Fi noise, and spurious signals, and then choose channels and placement that reduce contention and improve performance. It’s not about data throughput, battery use, or firmware updates—those aren’t determined by the spectrum view.