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    User name R. Michaels

    Log entry time 15:13:01 on March 17, 2014

    Entry number 386924

    This entry is a followup to: 386921

    keyword=noise on L-HRS BPM signals

    Looking at the output of the offset/attenuator boards on L-HRS we see
    a ringing of amplitude 20 mV peak-to-peak on a signal of nominally 200 mV.
    The ringing has a period of 6 usec and affects all channels.  The output
    shifts slightly (30 mV) when we unplug the input.
    We moved a board to another NIM crate -- similar ringing.
    This looks like the source of noise but I'm not sure how to solve it at
    the moment.