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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