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    User name mercado

    Log entry time 15:47:30 on October15,2009

    Entry number 295072

    This entry is a followup to: 294953


    keyword=Scaler channel went crazy in the middle of run 13265

    Figure 1
    Plotted is the sync signal versus pitadac (12-bit DAC value from CH crate) 
    versus time. The top left plot shows a weird dip in the rsync1 signal. The 
    other three plots (chsync1, chsync2 and rsync2) show what they should look like.
    Figure 2:
    (top left) Zoomed into the bad section of the rsync1 scaler channel. 
    (top right) What it should look like.
    (bottom left) BCMCAV2 in Right Arm crate.
    (bottom right) Correlation for BCMCAV and BCM2 for the same event cut.
    Correlation looks fine.
    So do we have a faulty scaler???

    FIGURE 1

    FIGURE 2