Ducati Ignition Tool

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This is Ducati BOSCH ignition pickup tool #88713.0131 - I recently acquired this - actually, I got 2 of them but there is a problem.  On one of them, the rotor is loose, the other is tight. 

Q1: How do I setup the rotor so that I can accurately check & adjust [if needed] the pickups? 

Q2: What is the best way to check/adjust the pickups using this tool?  My manual is not very clear.  It suggests to hold the pickups in contact with the special tool [for installation] then says to "check that between the bottom of each notch of the special tool and its pick ups there is a clearance of 0.04 to 0.05mm"     This is not clear to me.  I am not getting something here.  No mention of the fact that this rotor that has the 2 notches on it can rotate.....