I've made plots comparing three sets of transfer functions.
- 2026/05/26: On the LVEA Teststand with BOSEMs (90356) (individual results)
- 2026/06/01: On the LVEA Teststand with QOSEMs (90440) (individual results)
- 2026/06/10: In Chamber with QOSEMs (90590) (individual results)
Here are the comparison plots between the three. The most important plots right now are the P2Y and Y2P plots. They can be found in /ligo/svncommon/SusSVN/sus/trunk/BBSS/Common/Results/allbbss_2026_teststand_vs_chamber_BOSEMs_vs_QOSEMs/ and have been committed as r13043.
Side note: Since Arnaud and I realized our calibration DAC compensation mistake yesterday (90720), I have reanalyzed the last few measurements, including the three being compared here, using /ligo/svncommon/SusSVN/sus/trunk/BBSS/Common/MatlabTools/plotBBSS_dtttfs_M1.m. These are three measurements that had been taken with the 28bit DAC compensation gain in the COILOUTF filter set to gain(4096) = gain(2^12), which is the correct compensation when accounting for the difference in DAC counts between a 28bit and 16bit DAC. This compensation means that the calibration factor in plotBBSS_dtttfs_M1.m should've just accounted for the 16-bit DAC (since the rest was already accounted for), but it had been set to 18-bit DAC, so I reran them. The measurements that had been reanalyzed were 2026-05-26_1700, 2026-06-01_1700, and 2026-06-10_1700, committed as r13041.
Note: All three of these measurements were taken before the sign swap was implemented in the COILOUTF filter banks.
