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    User name brads

    Log entry time 19:23:12 on June 06, 2008

    Entry number 241353

    Followups:

    keyword=DAQ problem update

    We think we traced the problem to a bad power supply on ROC8. The problem was intermittent and hard to pin down. Eventually we were able to reliably have the deadtime go high with ROC8 in the readout list, and fix it by dropping ROC8.

    The crate started to perform properly after a second hard power cycle, but the power supply has a pretty loud high pitched whine. Since MCC is down, we decided to swap the entire fastbus power supply with the one from ROC9. Jack is doing that now.

    ROC9 is now disabled and is dropped from the readout.