It looks like we need to do something about the triple coil drivers that we switch in lock, especially PRM M3. We have lost lock a good fraction of the times that we have tried to switch in the last month or so. Screenshot is attached, I also filed an FRS ticket hoping that someone might make an attempt to tune the delays while people are in the PSL tomorrow morning. FRS ticket #5489
Is the DAC spectrum post-switch using up a large fraction of the range? If the noise in the PRC loop has change a little bit it could make this transition less risky.
Here's the PRM drive from last night's lock, in which we just skipped the PRM M3 BIO switching leaving the low pass off (BIO state 1). It seems like we should have plenty of room to turn the low pass on without saturating the DAQ.
FRS Ticket #5489 closed in favor of a long-term fix Integration Issue #5506 (which is now also in the FRS system) and for an eventual ECR. Work permit #5880 indicates we'll install the fix tomorrow. See LHO aLOG 27223.