starting the test (that therefore was not adding any new information). The change in the noise level clearly happened when an oscillation of the control loop was triggered, likely, by the work of Antonino in the laser lab at 14:33:05 UTC. The oscillation stopped when opening the position loop at 14:33:35 UTC (see Plot1).
Plot 2 shows the difference in the LVDTs raw noise level before and after the oscillation. Plot3 shows the error signal of the EIB control after the lucky intervention, with normal operating conditions recovered. The behaviour of the EIB is clearly not reliable and further investigation is needed in the coming days.
