Lately we got a 4th window parameter. The logic was that only one channel
contributing to a coincidence trigger on either level must be in a narrow
age window. There were still races of all kinds. This change is
conceptually simple and should eliminate all races.
The four window parameters (a₁ a₂ a₃ a₄) define a wide and a narrow age
window, wide: a₁ ≤ T ≤ a₄, narrow: a₂ ≤ T ≤ a₃.
All channels required to be hit by an L₂ trigger must have a pulse age T in
the narrow window. A hit on an anticoincidence channel within the wide
age window will inhibit the trigger.
a₄ is the L₁ trigger parameter that defines when the peak detector will
be reset. Hits with longer age will not show up in the data and not be
seen by the L₂ trigger. The parameters should be monotonic, but need
not be distinct.
git-svn-id: svn+ssh://asterix.ieap.uni-kiel.de/home/subversion/stephan/solo/eda@7795 bc5caf13-1734-44f8-af43-603852e9ee25
