@Kerry,
@Tintin:
Thanks for your input.
It was long ago that I accessed my MS600 via webinterface.
Usually I select the options by using the C15.
And same possibilities for me as shown on your Picture: I can set x1,x2 and DIRECT!
That should lead to a native digitial signal.
So everything is set for some comparisons.
Thanks again

ML Expression 13A, AVM Ovation SA8.2, Sooloos C15, 818v3