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    User name Yi Zhang

    Log entry time 02:17:43 on November13,2008

    Entry number 248485

    keyword=BB Cerenkov HV tuning

    As Mezinani suggested, we lowered the channel S12 -> L12.4 from 1700V to 1200V, just to see a better shape of signal on the scope. They are the HV setting now.
    we would like to tuning the other channel. later I will make another log entry after change.

    FIGURE 1

    FIGURE 2