not sure of the cause yet. The 60-200Hz noise came back a few times before the lock loss, maybe related?
Back to observing after getting to low noise and losing lock to an unheard PI, and then a brief period of comissioning when we were back up again.
Back to observing after getting to low noise and losing lock to an unheard PI, and then a brief period of comissioning when we were back up again.