Your components' power supplies are designed to putput clean DC to activate the circuitry. No need to worry neurotically about noise on the AC line. Competent engineering takes care of that.
How can I measure the noise on my AC mains with a 2ch oscilloscope?
I’m not an EE so although I have some nice test equipment I need help. Here is the problem, the AC Mains are 120 vac but I’m trying to measure the noise on the AC signal , millivolts. I’d like to answer two questions how bad is my power and second does my isolation transformer make a difference.
thanks for the help