Yesterday morning the BS M2 stage coil driver was swapped out with a spare in an attempt to improve the seemingly bad UR Noise Monitor Channel. The swapped showed a similar condition, only in the LR Channel. As the test plan for TACQ Coil Drivers doesn't require testing of these circuits, we have no data to correlate these issues. However, when the original coil driver was replaced back into service and re-tested, the resulting measurements were reasonably identical to the original measurements. This seems to be a strong indication that the issue is a condition of the monitor bd in the chassis and not cabling/AA/ADC channels, etc. The far left image is the original spectra for the BS M2 stage. The middle image is the spectra for the substitute coil driver. The far right image is the spectra for the original coil driver after re-install.