DanB, Sheila, Anamaria

As reported before, eg here, the calibration is pretty good down to some 30 Hz according to pcal broadband injection. kappa_pum and kappa_uim are reporting very different numbers from the nominal gains of 1 in the analog suspension calibration filters (~0.8) so we thought maybe these things are connected. We implemented them in the calibration filters of ANALOG ETMX L2 and L1, but after a pcal sweep, that made the low frequency calibration much worse; and the 35 Hz - ish pcal line visibly did not match anymore. We backtracked these changes.

Kappa_tst is 1 and the filter is 1, so at least that matches well.