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    User name R. Michaels

    Log entry time 10:20:00 on October20,2008

    Entry number 244096

    Followups:

    keyword=DAQ problems (2)

    Two problems with DAQ:

    1. The DAQ sometimes has large deadtime, or stops. We think the
    TS communication cable needs to be re-terminated. (This problem
    happened again this morning, it seems to come and go.)

    2. The ADC in ROC3 slot 23 is very noisy. Result was that automated
    pedestal determination was unreliable. We tightened the criteria
    (ped width must be < 3%) so that at least the auto-ped is not wrong.
    In the meantime the pedestals must be determined by hand. We may
    consider replacing this ADC, though the data from it looks otherwise
    ok, says Vince.