Hi Michael, thanks for the screenshot. To look in to why there are these spikes in the noise floor readings we'd want to take a look at some tech data.
This guide reviews how to pull tech data from an IQE AP. For best results and the quickest help, I'd recommend opening a support ticket and attaching your tech data to the case. If you don't want to open a support case at this time, I'd be happy to take a look at the tech data for you to see if I can find anything, so please also feel free to send the tech data to me at community@extremenetworks.com.
Just a note about the tech data, it would be best if we could pull a new tech data file right after we see a spike in the noise floor. Parts of the tech data file get overwritten with new data after a certain amount of time, typically about every 15 minutes, so to get the best look at what's going on here, we'd want to pull tech data as close to a spike as we can.