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    User name R. Michaels

    Log entry time 15:55:16 on July25,2005

    Entry number 149424

    This entry is a followup to: 149033


    keyword=cavity monitors in spectr.DAQ mode

    Regarding the (new) cavity monitors and the spectrometer DAQ
    readout: The oscillations seen on the scope on Friday are normal
    with no beam; the X,Y flops around since one is dividing by zero.

    During today's controlled access, J. Musson injected signals into
    the cavities. It simulates 25 uA and rather "large" displacements
    of +/- 5 mm. Spectr.DAQ run 2274 with upstream cavities at
    (X,Y) = (1V, 5V) = (-5 mm, +5 mm) very roughly, and run 2275
    with (X,Y) = (5V, 1V) = (+5 mm, -5 mm) are shown in fig 1 for
    raw signals. Note, this 12-bit ADC ranges to 4096, so the signals
    are in the dynamic range.

    The next step is to complete the commissioning plan.

    FIGURE 1