Reports until 14:44, Wednesday 22 July 2026
H1 SUS
oli.patane@LIGO.ORG - posted 14:44, Wednesday 22 July 2026 (91193)
BBSS M1 QOSEM Satamp Whitening turned on

The BBSS M1 now has its satellite amplifier whitening on as well as now having digital filters on that compensate for the satamp whitening. So far the BBSS is damping well.

After lunch I finally had time to go out and turn on the whitening on the BBSS M1 Satellite Amplifier. I put the BBSS in SAFE and then went out to SUS-R2 and flipped the whitening switch from OFF to ON. Once I came back, I turned on the anti-whitening compensation filters on H1:SUS-BS_M1_OSEMINF_{F1,F2,F3,LF,RT,SD}_{X_RAW,Y_RAW,SUM} and H1:SUS-BS_M1_WD_OSEMAC_BANDLIM_{F1,F2,F3,LF,RT,SD}_{X_RAW,Y_RAW,SUM}. The compensation filters are all in FM1 in their respective filter banks and are called 2.9:14e-3. The full compensation filter is zpk([2.89],[14.4e-3],1,"n").

These filters being on were accepted in SDF.

Images attached to this report