J. Kissel, J. Driggers

We've used the results from LHO:47166 and 46773 to install improved compensation for the H1 SUS ETMX (L2/PUM) and (L3/TST/ESD) stages, respectively. The new compensation is now ON and running.

Attached are the frequency-dependent systematic error improvements that should be gained by each actuator stage from these installations, assuming we run the PUM driver in State 3 (ACQ OFF, LP ON) and the ESD driver in State 2 (LP ON) during nominal low noise.

In the interest of time and person power, I've elected to *not* improve the compensation for the UIM driver, because
    (a) The frequency band in which the UIM driver is involved in the DARM loop is below the detection band of interest at ~20 Hz and above
    (b) We are only using State 1 of the UIM driver (all LPs OFF), which has a simple zero:pole = (300:85) Hz response is probably good enough.