Displaying report 1-1 of 1.
Reports until 18:29, Thursday 11 December 2025
H1 SUS (CDS)
ryan.short@LIGO.ORG - posted 18:29, Thursday 11 December 2025 (88491)
ITMX Coil Driver State Binary Readback Issue

A. Effler, R. Short

People had noticed earlier an issue with SRM's coil driver binary IO state (see alog88486) so other optics were checked. ITMX's monitors showed some concerning colors (see first screenshot), but after taking a spectra of the quad's top-mass OSEMs comparing similar lock states before and after the power outage last week (see second screenshot), I am confident in saying the actual behavior of ITMX is unchanged and this boils down to a readback issue on the binary IO. This evidence is backed up by the fact that ITMX has been correctly aligned in our locking attempts, and Anamaria and I cycled the state requests a few times and saw expected behavior from the suspension. Dave says he and others will be looking into this.

Images attached to this report
Displaying report 1-1 of 1.