You are reporting on the RF environment in you facility.

The energy radiated by flooring materials that causes interference in the 2.4 GHz and 5 GHz bands.

The noise caused by elevators, microwave ovens, and video transmitters.

The RF energy that exists in the environment from intentional and unintentional RF radiators that forms the baseline above which the Intentional signal of your WLAN must exist.

The extra energy radiated by access points and client devices beyond that intended for the signal.