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    User name V. Sulkosky

    Log entry time 19:05:46 on April 25, 2009

    Entry number 268427

    This entry is a followup to: 268311

    keyword=Preshower Channel 42 Fixed and 18 Still Wide

    I tricked myself yesterday and thought I had fixed the pedestal for ADC
    channel 18. Unfortunately I got confused at the gas panel and ended up
    plugging channel # 42 into channel # 18. So over night, channel 18 looked
    good, but channel 42 was unplugged at the patch panel.

    I fixed this mapping problem. The first figure shows preshower 36-47 and
    channel 42 is now working again. The second figure shows preshower 12-23,
    but unfortunately channel 18 still has a wide pedestal. Hence the delay
    cable is not the problem. So either the filter has a problem or the
    ribbon cable going to the ADC board.




    Figure 1



    Figure 2