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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