Ok, understand. I lack the abilities to measure the signals. So, to be on the safe side, I bought a MAX485 CPA from Digikey and I will be using your schematic of the little DMX Tester (very nice b.t.w.). I will post the results.
Ok, understand. I lack the abilities to measure the signals. So, to be on the safe side, I bought a MAX485 CPA from Digikey and I will be using your schematic of the little DMX Tester (very nice b.t.w.). I will post the results.