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    User name R. Michaels

    Log entry time 18:51:19 on January24,2001

    Entry number 55593

    Followups:

    keyword=re: double peaks in TDCs

    The evidence so far is that the narrower widths I started using (to reduce EDT)
    for the discriminator outputs caused problems with the large (880 nsec)
    digital delays used to put the scintillator logic signals into the TDC.
    The narrower widths appear to cause signals to jump by ~12 nsec
    leading to two distributions. The narrowest signals were L-arm-L-PMTs
    which were 50 nsec. The others were 70 nsec. We previously ran with
    100 nsec and that's what I re-established now, and this appears to
    substantially reduce the effect. Its necessary to check carefully with data !!
    If what I have said is correct, then TDC signals like VDC and
    cerenkov are not affected and can possibly be used to correct
    for the 12 nsec jumps in scintillator timing.