Following power spectra taken on friday february 27th (see LHO aLOG entry 5596), transfer functions have been ran over the week end for PRM phase 3a testing.

The two attached pdf show comparison between hsts model, LLO Phase 2b (March 2013) LHO Phase 2b (March 2013) and LHO Phase 3a (March 2013) respectively with suspension damped and undamped.

Transfer functions are nice and smooth, showing peaks at the expected frequencies.

Phase 3a testing is therefore complete