Seeing a reverse sawtooth-shaped noise spike in OS X Wi-fi Diagnostics that is associated with wireless connection drops. My wireless router is old, so it might just be dying. It seems to be somewhat random, and more of a problem when I'm farther away from the wireless router, probably due to the decreased signal level, but I might be imagining that.
Is this spike similar to what you'd see with a problematic, old wireless router? If not, what are other likely causes (bad firmware update, router config issues, external source causing noise)?
Also, what would be a likely reason for the almost immediate increase in noise intensity, followed by a mostly linear drop in noise strength back to normal for an extended time?
Update: Just replaced the router, and the noise spikes are still occurring.