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    User name Diana/Rich

    Log entry time 19:27:15 on January 29, 2008

    Entry number 227925

    Followups:

    keyword=Duplicate FADC Installed in Hall

    We have installed the duplicate FADC in the VME crate, in the same slot where the original FADC sat. (The original FADC is lying on its side in the crate).

    Their unplugged noise characteristics seem similar. Both display a strong dependence on the DAC offset, with a minimum near 38000. However, the noise in the new FADC does not climb as quickly when the DAC is moved from the optimum range, so we decided to give it a try.

    Next step: CODA and FastDAQ scans of the new FADC response to changes in DAC, timing, threshold, etc.