Based on Oli's range checks (alog83063) we decided to run the a2l script and a PRCLFF measurement after getting run coordinator approval. Below are the results of the a2l script, a few moving quite a bit. These have been added into lscparams.py and they are not in SDF. Jenne will post the PRCLFF results.
RESULTS
| Initial | Final | Diff | ||
| ETMX | P | 3.34 | 3.23 | -0.11 |
| Y | 4.9 | 4.91 | 0.01 | |
| ETMY | P | 5.56 | 5.49 | -0.07 |
| Y | 1.28 | 1.35 | 0.07 | |
| ITMX | P | -0.66 | -0.53 | 0.13 |
| Y | 2.97 | 3.21 | 0.24 | |
| ITMY | P | -0.06 | 0.06 | 0.12 |
| Y | -2.51 | -2.74 | -0.23 |
We reran the PRCLFF injection template to try and improve the range in the 20-50 Hz range. The template was at /opt/rtcds/userapps/release/lsc/h1/scripts/feedforward/PRCL_excitation_gain_adjust.xml.
The right two panels are the magnitude and phase of the PRCL to DARM transfer function.
We tried gains of 0.9 (starting value)
1.0
1.3
1.5
We found the TF was minimised in the 20-50Hz range using a gain of 1.3 in PRCLFF (pink trace).
The live trace was our last step (red) which was a gain of 1.5.
The coherences are shown in the bottom left corner (labels correct but colours don't correlate with the TF colours).
(NB: Ref 1 darm spectra in top left is old reference - ignore).
TJ added the value to lsc params and I accepted it in the OBSERVE snap file.
