OK, so now i finally got it altogether...
when u say "z-link" u mean 8 analog inputs? (the analog inputs of the a16u appear in the scope software as z-link 1 / 2 ? )
But basically i understand that the maximum u can get from such a system is 16 channels in and 16 channels out.. (either 16 digital or 16 analog)
thanks for the help guys.