See the first plot for the HAM6 HEPI sensors spectra collected today; this is with the ISI Damped and the HEPI unstopped and I believe the position loops closed.  With the L4Cs looking pretty good, it doesn't look like an interference issue.  The character of the V2 IPS suggests it has a problem,... although it does show some character around 25hz like the other sensors.  Plotted with HAM4 from April for reference.  There is no earlier HAM4 Spectra in the files.  Could it be something with the control loops?

The second attachment compares the HAM6 Spectra 24 hours ago before I unlocked HEPI.  Maybe I screwed up some cabling this morning.  I checked the local basis IPS and they didn't shift enough to go out of range but I should check that physically.

Recall I have not run new TFs on this platform.  There are TFs for HAM6 from October 2013, these look very good and very similar below 10hz to say HAM4--see comparason attachment #3.

Don't understand the foton file generic loops.  Jim and I looked at the Isolation fotons for HAM6 5 & 4. The boosts are the same but the controller filters are not.  HAMs 4 & 5 are near identical for all dofs.  At HAM6 the phases and shapes are all the same but very different in magnitude for every dof. Here is the ratio

Probably no surprise the boost for X will work but the loop goes unstable with all other dofs.

Loops are closed but with no boosts.  I haven't started guardian for HAM6, maybe it exists. I'll try when I won't interfere.