So far the scope of Physics Stack Exchange has been defined to exclude experimental technology questions, which are those questions about the devices that one uses to do physics, rather than about the physical principles they use. Some of these questions fit on Electrical Engineering, and there was a proposal on Area 51 that would have been a great home for these questions. However, that proposal is no more, and given that this site is well established with a steady flow of physical principles questions, is it time that we start to allow the questions about experimental technology?
Here is a recent example that prompted this question: Strategies against 50 Hz mains hum on detector signals?
See also Does the Area 51 proposal "Experimental or Applied Physics" duplicate this site?