Matt noticed that BPM 12 started to saturate during the present run; I call MCC and ask them to reset the gain.
Meanwhile, Doug reads the troubleshooting guide for PRex and finds that, in order to avoid this, the "Hall A Fast FB BPM Gain Control" should be in Manual "Gain Control Mode"... and it is in "Automatic" at present.
Decide not to ask MCC to change it right now, since BPM 12 is OK at present, and since we will be going into a long series of Moller measurements... However, when we go back to production mode, we should probably as MCC to change this to "Manual".
An expert should weigh in on this.