I repeated the measurement from alog 31399.

The attached plot looks very similar for all traces but PSL-ISS_PDB_REL—indicating that the changes described in alog 32206 significantly reduced the extra noise in the first loop ISS path.

We also see that the new REFL_A_RIN channel (see alog 32191) is working fine.

Between 10 and 30 Hz there is coherence between REFL_A_RIN and the DCPDs. There is a clear shelf in both spectra pointing towards a parasitic interferometer path.