Trend of H1:IOP-SUS_ITMY_WD_OSEM1_RMSOUT shows increased motion during the 10 minutes post-RCG upgrade that OMC0, see alog 85120, was clobbering IPCs, including two peaks.
The attached screenshot has cursors at the approximate start and end of OMC0 clobbering IPCs. RMS remained high until guardian was started 30 minutes later, after which ITMY continued to ring until guardian was again restarted.
We will attempt to trace the clobbered IPCs to see if they plausibly could have driven ITMY.
The attach list shows the mapping from OMC0 IPCs to IPCs that were clobbered during the ten minutes OMC0 was running on the wrong IPC table.
ITMX, which received the same clobbered channel as ITMY, also showed a spike in movement during the same period, but was properly stilled by guardian.
