LB 500 programming for Pi-Beta trigger
This LB 500 replaces the old pibeta trigger and produces out of the ten
super-clusters low and ten super-clusters high four signals. The first two
represent the pi-beta back-to-back logic, where one supercluster has to
fire in coincidence with the opposite superclusters. The pibeta signals are
genrated both for Hi and Lo supercluster inputs. The second output is a simple
or of all superclusters, also Hi and Lo.
The labels on the inputs and outputs are in the form HnPm, where n
is the header number (1...4 from top to down) and m is the pin number
(1..16, as labeled on the unit).
Here is the toplevel schematic:
It contains the back-to-back logic:
a three-arm trigger:
The additional buffers at the output of the shapers are for signal delay.
S. Ritt, August 2nd, 1999