Just a heads up: while y'all are asleep, I'muna gunna take some active measurements of ETMY, and perhaps gather some quiescent spectra of the TOP stage of TMSY while those are running. I hope to be done in 2 hours, starting from 9:30a ET, 6:30a PT. I have reserved this amount of time on the CDS reserve systems MEDM as well. Please, don't hesitate to call if you need me (617 452 3605) to stop before hand -- otherwise, consider me to be done at 11:30 ET, or 8:30a PT.
Notes for later: Measurement conditions: BSC6-HPI is ON (Position feedback loops only), WD ARMED BSC6-ISI is ON (Damping loops only), WD ARMED H2SUSETMY - damping loops OFF, - P&Y offsets have been removed (they were P 2804 [ct] and Y 14443 [ct]) - Coil Drivers in State 1, COIL enabled (LP OFF, or "ACQ") (and "properly" compensated) - All WDs ARMED (Thresh OSEM DC = [-30e3:30e3] OSEM AC = [20e3], ACT AC [55555]) Driving through the damping filters - inputs off, - default legacy filters ON - default legacy gains ON - [L, T, V, R, P, Y] = [-1, -5, -2, -0.3, -0.1, -0.1] Open Loop TF is from DAMP_EXC through FMs 1 and 10, response is DAMP_IN1, so OLG TF is in the same units of Sensor [ct]/ Sensor [ct], so it accurately represents the open loop gain. Plant TF is uncalibrated, but the only calibration necessary is the usual scale factor of 60, so we can treat it as calibrated * 60. Reference data from 2012-04-14 data set Drive amplitudes (Started with standard out-of-loop, from TEST_EXC, TF templates): [[ Watched for / confirm no ]] DAC saturations L = 1000 [ct] (was 4500 [ct]); AC RMS = [F2, F3] = [4.4e3, 4.4e3] P = 200 [ct] (was 200 [ct]); ACT AC RMS during meas: [F1, F2, F3] = [3e3, 1.6e3, 1.6e3] Y = 300 [ct] (was 300 [ct]); ACT AC RMS during meas: [F2, F3] = [1.5e3, 1.5e3] Data saved to .xmls: SusSVN = /ligo/svncommon/SusSVN/sus/trunk/ ${SusSVN}/QUAD/H2/ETMY/SAGM0/Data/ 2012-06-28_1358_H2SUSETMY_M0_Mono_L_WhiteNoise_OLGTF.xml 2012-06-28_1358_H2SUSETMY_M0_Mono_P_WhiteNoise_OLGTF.xml 2012-06-28_1358_H2SUSETMY_M0_Mono_Y_WhiteNoise_OLGTF.xml