...
both must have 90degree !
result:
after checking my oscilloscope settings i found out, its my fault - the channeltrigger settings was set to "dual", needed is here single 1channel..
later i changed back the resistor R51 (board1) ( origin 430ohm, ) to 330ohm so i have a same amplitude..
here correct Oscilloscope settings (click to enlarge)
correct result step1: fine
Step 2 measurement - before R51 changed to 330ohm i used 51K (electro-music-thread -info, was wrong in my case)
Step2 after changing to 330Ohm is like this: fine
