Marc, Matteo, Michael

One possible reason for our very low coherence could be that we injected uniform noise with 4000 counts.

To improve both the driving and sensing it is actually better to inject noise through swept sine.

We did so with noise amplitude of 10000 counts and found that the length mechanical resonance at 0.9 Hz was strongly excited in every dof.

Either the noise is too strong, the PSD is at a wrong position or the driving matrix needs to be tweaked.

We are currently taking again this measurement with lower noise amplitude at 4000 counts.