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    User name R. Michaels

    Log entry time 16:35:29 on January 15, 2009

    Entry number 256225

    This entry is a followup to: 256222

    keyword=re: negative deadtime

    For run 5187, I see

    Number of events in raw data file (evtype <= 12); 150488
    Number of counts in L1A in bbite scalers = 150488, agrees with above (good)
    Number of counts in L1A in L-HRS scalers = 198589, disagrees (bad).

    The "datamon" GUI uses L-HRS.
    BBNormAna presumably uses bbite scalers.

    Excess of L1A can cause apparent negative deadtime and could be caused by
    flakey cabling, reflections, etc.

    On a different note, in run 5187 there seem to be a large amount of extra hits
    in fastbus modules. (flags 0xdcfexxxx). Perhaps the experiment doesn't notice ?

    A copy of this log entry has been emailed to: kalyan@jlab.org