Overview

A synchronized oscillator was added to QUAD_MASTER model test mass stage (L3). After re-compiling the SUS-ETMY model there will be two synchronized ossilators in L3 stage that will be used for driving calibration lines: *_L3_CAL_LINE and *_L3_CAL2_LINE.

Removed channel LKIN_P_LO from the list of DQ channels and added L3_CAL2_LINE_OUT into the list.

The h1susetmy model must be recompiled in order for the changes to take effect.

Details

For one of the two calibration lines that we needed to run during ER9 we used a pitch dither oscillator, SUS-ETMY_LKIN_P (see LHO alog 28164). After analyzing the ER9 data we found two problems with this line (see LHO alog 29108):

• First, the drive amplitude that we set was not sufficient for estimation of the time-dependence in the ESD actuation strength.
• Second, the CAL-CS model that calculates the time-dependent parameters rely on an oscillator that is synchronized with the ones in the SUS-ETMY and CAL-PCALY models. Since SUS-ETMY_LKIN_P is not a fixed phase (synchronized) oscillator, the phases have to be adjusted by hand every time the oscillator gets restarted. With synchronized oscillators this is will not be necessary.

The second synchronized oscillator was added at L3_CAL2_LINE_OUT and the list of DQ channels was modified accordingly. The L3_CAL2_LINE_OUT was added with sampling rate 512 Hz. LKIN_P_LO was removed from the list of DQ channels.

The changes were commited to USERAPPS repository, rev. 14081.