Hi all, I’m seeing continuous noise at a frequency at all times of day. However, the frequency seems to wander a bit, ranging somewhere between 20 - 30 Hz over the course of the day.
The shake is underneath a makeshift Faraday aluminum-foil-covered plastic box covering all sides except the ground which it is in direct contact with, which I think would filter out some of the external RF noise.
Any ideas what this mystery signal could be and how to eliminate it?