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    User name silwal

    Log entry time 22:22:32 on August20,2009

    Entry number 285075


    keyword=LED tests: baseline intensity variation with frequency

    typical LED baseline signal with increasing frequency. On the x-axis are the 
    DAC16 values. DAC16 28000 coresponds to about 7.5 Khz, and DAC16 50500 
    corresponds to about 750 Khz. Get the same pattern at different pulse heights. 
    HV = -1200 V on det. 
    run # 11486 & 11496: both diff and baseline LED inside the det, and pulsing.
    run # 11489: diff LED outside, baseline LED inside, both pulsing.

    FIGURE 1