I did a quick test to check a hypothesis that PRM is interfering with some other optics in the single bounce configuration.
I shook all the suspensions (except the MC mirrors) at 3 Hz in POS, PIT and YAW with an amplitude of 1000 counts.
No effects were found in the REFL demod signals.
So it is NOT a fringe effect caused by the other suspended mirrors.
Quote from #6202 |
The REFL11 and REFL55 demod signals show high frequency noise depending on how big signals go to the POS actuator of PRM.
Is PRM making some fringes with some other optics ??
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