It’s been a challenge the last few days to keep a good solid WiFi signal in our office, despite the device being only 20′ feet away with not even a door for obstruction.

The most recent wireless performance test using DSL reports is here:

To verify if it’s the device, something upstream, or a wireless performance issue (look at the signal strength, it’s as good as it gets),

I jacked straight into the router and re-ran the test:

That’s a massive drop in performance for WiFi. Clearly not our internet on-ramp.

So far, my only guess is that there is a transient amount of interference from some device nearby. We’re not running anything in our office or shop that should cause this sort of drop in performance. We are located in a light industrial environment, so there could be some large electrical loads causing radio noise. The question is, how do we find it and how do we mitigate it?