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    User name R. Michaels

    Log entry time 11:00:04 on June28,2010

    Entry number 328900

    Followups:

    keyword=ROC4, slot 24 gate problem

    I investigated the spot++ problem.

    For runs prior to 1262 things look ok, though I didn't check
    every run.

    Starting run 1262 there is a missing gate on ROC4 slot 24
    (BPM/raster ADC). This affects several subsequent runs, but
    the problem becomes more intermittent at around run 1286.
    In run 1286, spot++ still doesn't work because the ADC data
    are saturated. I'm suprised nobody noticed the problem
    because when the gate is missing the entire crate does not
    read out, so no VDCs from ROC4 (upper crate). I'll go into
    the hall to investigate more.

    Raw data for run 1286 for example:

    Left HRS spot++ raw data 0 16383
    Left HRS spot++ raw data 1 16383
    Left HRS spot++ raw data 2 16383
    Left HRS spot++ raw data 3 16383
    Left HRS spot++ raw data 4 16383
    Left HRS spot++ raw data 5 16383
    Left HRS spot++ raw data 6 16383
    Left HRS spot++ raw data 7 16383
    Left HRS spot++ raw data 8 16383
    Left HRS spot++ raw data 9 16383
    Left HRS spot++ raw data 10 16383
    Left HRS spot++ raw data 11 16383