17-04-2016, 03:00 PM
Ah, I should have said that it really does like to be AC Coupled. When I was playing I tried a direct Connection from my Advance 81A - 600R Balanced - and the Negative Swings clip on the Input Protection. Logical really as it's just a PIC Schmitt Input. I guess a lower Impedance Source or bigger Drive Level would have broken it.
Alan
Alan






