Trigger point likely as high goes low, that is driven edge. Going high is by pull-up, slower and less precise. Lookin at windows in relation to crank timing may give clues. In my system one edge is base timing, the other is max advance. So, one window pulse may be base, other max advance. Since CMP is related to rotor phase too, seems crucial setting. I have no idea about setting that. My work has been mostly direct fire.
