Running a PMDX-126 and -107 on a 220v 3 wire power circuit. (2 phases and ground) .
I was getting spurious signal triggers and found that signal ground from J11,12,13 float. I think it says that in the docs so I wasn't surprised.
However I find that chassis ground to signal ground measures 50Vac and I'm sure that is the reason for the spurious signal triggers.
So I tied the signal ground to chassis ground and that fixed the issue... But I'm sure you left them floating for a reason,. Do you think this is a mistake and if so what other solution is there?
In addition what about the PC ground (J1-6) which are also floating at 50VAC ref to chassis. Should I ground it as well?
You carefully designed it to not be ground referenced so how badly am I messing this up by using a common ground for all?
Its a new build, not retrofitting anything.