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    User name D. Parno

    Log entry time 22:51:31 on February27,2009

    Entry number 263766

    This entry is a followup to: 263639

    keyword=L1A vs clock count for Run 1858

    Mark noticed a small gap in the syncroc check for 1858. The L1A signal also shows some glitches.

    Typically, the first L1A signal is much lower than the others, but in this run the first L1A is high and it's the _second_ that's low.

    Slightly later, there seems to be some pileup. Two L1A measurements on top of each other seems to imply that the clock did not increment ...

    Toward the end of the first million events, we see that the L1A signal has a distinct upward trend, despite the beam current being flat.

    An odd run.

    FIGURE 1