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    User name R. Michaels

    Log entry time 19:35:34 on July 18, 2006

    Entry number 174423

    This entry is a followup to: 174420

    keyword=re: suspected bad ADC

    To check if the ADC is bad, run with pedestal suppression off
    (command is ~a-onl/ped/loadzero.com) and with the cable unplugged.
    If you get normal pedestals in the range 400 to 600, the ADC is
    probably ok. Zero's can result if : 1) Ped suppression really
    was not turned off and there's no signal, or 2) The signal has the
    wrong polarity; if its just barely wrong you'll see a tail from pedestal
    towards zero and if its very wrong you'll just get zero.

    A copy of this log entry has been emailed to: feuerbac@jlab.org,camsonne@jlab.org