There is now a new filter in the H1:SUS-ETMX_L2_OLDAMP_P filter bank which is supposed to help avoid exciting the bounce mode when the OpLevs are on (in FM3 called Phase9.8).

We had previously used this filter module (sending OL PIT to L2) as a means of damping the bounce mode excitation.  Now, we are hoping to prevent excitation by setting the phase of the usual OL filter to match that of the damping filter at the bonce mode frequency (roughly +90dg, see attached plot).