> After these measurements, the status of the control and outputs are recovered (but I didn't check whether the values went back to ones before the measurements).

-- Thanks a loy for this help, Okutomi-san.
-- Concerning the issue GAS-LVDT signal started oscillating when the loop was closed, I cut off the higher frequency gain more steeply (a bit).
I also remind this (klog#7111), somehow this works, weird though..
-- Now the gurdian is working.

= ONE SAD NEWS =
-- One signal, BF-LVDT-V2, is *not* sensing the suspension motion. it looks just showning ADC noise.
-- I hope this is issued by a stuff outside the chamber. To be chedced.
I WOULD SAY THERE ARE TOO MANY TRAPS. WE HAVE TAKEN CARE OF YOU SO FAR(klog#7597)!