I see TEM00 transmitted beam out of RefCav. I think I have to fine tune the FSS gain a bit more becasue the spot still oscillates a bit.
The left monitor shows the spot from PMC. The right monitor shows the spot from RefCav. it looks distorted becasue of the filter.
The common gain is 16.1 dB
slow actuator is 9 V
Fast Gain 15dB
Optimization is yet to be done. There is still plenty of reflected power.