As a follow up to the measurments I ran on ETMY last week, I ran a similar measurement on ITMX this morning. To recap, all of the isolation loops were engaged on the ISI, blends swith to Start, and I drove in low frequency in Z on first the ISI, then a second round on HEPI. In the attached plots, the dotted references are the first measurement, the solid lines are the second. Pretty much the same story as last week, with some weird tilt-looking coupling when we drive on the ISI that seems to disappear when I drove HEPI. I included the L4C's this time around. Curious that the L4C's don't seem to see the coupling as much as the T240 do, but more than the cps's do (which I didn't get this time around).

I tried to measure the Flex modes (T240 over-constrained modes), but their cartesian component matrix elements are all zeroed, so I didn't get any data. I'm unsure of what those values should be, and they aren't defined in Fabrice's Sensor Location document, T1000388.