J. Kissel, J. Warner, D. Barker, E. Merilh, TJ Shaffer

The one final quiver in our arrow against the sharp HAM3 0.6 [Hz] resonant feature was a computer (as suggested e.g. here), so we did so this morning. Sadly, it did not cure the problem. For now, we continue on, running in the configuration defined by Seb last week, see LHO aLOG 16100, in which the RY blend filters at a higher blend configuration, which is the only thing we can find that seems to help (see LHO aLOG 16001). This has now officially become a low-priority until it begins to quantifiably impact IFO performance.

A Recap of all of the things we've tried that DIDN'T make the feature go away:
- Restarting the front-end process LHO aLOG 15759

- Full power-down of Front-end and I/O Chassis (This aLOG)

- Coil Driver Swap LHO aLOG 16071, LHO aLOG 16061, LHO aLOG 15981

- Changing Suspension Damping LHO aLOG 16013, LHO aLOG 16001

- Changing Isolation Loops LHO aLOG 16001

- Location of Sensor Correction; ISI vs HPI LHO aLOG 15941. LHO aLOG 15933

- Changing from STS2 B to A; In analog LHO aLOG 15811, In digital LHO aLOG 15927, LHO aLOG 15894

- Checking between ADC and sensor correction bank LHO aLOG 15783

- Turning OFF CPS satellite amplifiers, checking jumper settings (oscillators, jumpers, etc.) LHO aLOG 15751

- Adding a large mechanical offset to relieve supposed mechanical rubbing LHO aLOG 15751

- Waiting LHO aLOG 15565