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    User name bogdanw

    Log entry time 03:09:10 on June23,2000

    Entry number 44702

    keyword=VDC threshold

    Regarding of the VDC in Chai's entry 44665.

    1. Change of the VDC threshold voltage will require calibration
    of t0 offsets - so, need to be justified.
    2. Change of the VDC threshold can lead to electronic pickup.
    if one like to check the need of lowering threshold the best
    way to do the check is to INCREASE the threshold and find
    how it effects the "efficiency" .
    3. The logic of the "efficiency" calculation in dhist/hana can be
    improved by :
    i) selection of the xx0x or x0xx or so on clusters with three+ hits
    on the straight line.
    ii) requirement of the hits in correct time window.