J. Kissel

Jennie had shuttered the SPI yesterday as a part of further QPDA dark noise (LHO:91791). I 
    - unshuttered it this morning, 
    - restored the dark offsets in the QPDA SEG banks (rather than the fake signal offsets) and 
    - reset the phase unwrapping algorithm in the IFO signal chain. 
Power monitoring came back to (MEAS, REF) = (13.6,10.4) [V], which (from memory) is typical.
QPD centering came back to (QPDA; SUM, P, Y -- QPDB; SUM, P, Y) = (25.3 , 0.014 , 0.020 ; 30.0 , -0.016, -0.017)

Restoration complete by 2026-09-04 16:08:00 UTC.

z avg 10 H1:SPI-H23_FBR_PWRIN_MEAS_OUT_DQ H1:SPI-H23_FBR_PWRIN_REF_OUT_DQ H1:SPI-H23_OL_QPD_A_SUM_OUT_DQ H1:SPI-H23_OL_QPD_A_PIT_OUT_DQ H1:SPI-H23_OL_QPD_A_YAW_OUT_DQ H1:SPI-H23_OL_QPD_B_SUM_OUT_DQ H1:SPI-H23_OL_QPD_B_PIT_OUT_DQ H1:SPI-H23_OL_QPD_B_YAW_OUT_DQ
H1:SPI-H23_FBR_PWRIN_MEAS_OUT_DQ 13.648861408233643
H1:SPI-H23_FBR_PWRIN_REF_OUT_DQ 10.352759647369385

H1:SPI-H23_OL_QPD_A_SUM_OUT_DQ 25.805402565002442
H1:SPI-H23_OL_QPD_A_PIT_OUT_DQ 0.014341713674366475
H1:SPI-H23_OL_QPD_A_YAW_OUT_DQ 0.019697268679738044

H1:SPI-H23_OL_QPD_B_SUM_OUT_DQ 30.1885705947876
H1:SPI-H23_OL_QPD_B_PIT_OUT_DQ -0.013530098926275968
H1:SPI-H23_OL_QPD_B_YAW_OUT_DQ -0.018152973800897598