Hi, I've got a Tek MSO4 scope, is it common for the scope to have an audible whine while powered on? The whine is always there even with no probe connected and no matter what setting.
I've never noticed it before but lately, I've been hearing it and it's getting pretty annoying.
There is also a chirping noise when the power is on but the scope is turned-off, the chirp turns into a whine as soon as the scope is powered on.
I tried to plug the scope into an entirely different electrical circuit ( not just a different outlet ), and it's almost as if the whine shifts to someplace else, this time there isn't any chirping. but a few seconds after Power-on the whine starts and it's as if the whine is noisy ( still continuous, but the frequency is all over the place )
Could this be because of a wiring issue?