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User name R. Michaels
Log entry time 17:03:21 on October 2,2000
Entry number 49082
keyword=Event type bit pattern
The Event type bit pattern is fairly reliable in the TDC
that latches it. Below are the TDC spectra for the 5 channels
corresponding to T1 - T5 for a pulser + cosmics run, for
the triggers before prescaling. The signals after prescaling
have a problem that there are spurious data in T1 at strange
times, but it looks like it can be cleaned up. The pattern is
well correlated to the CODA event type for true coincidences
(plot 2), but for far-off-time randoms you'll need to use
the bit pattern. (See ~rom/evchk/README).
FIGURE 1
FIGURE 2