We shifted the 7MHz PLL frequency a little bit up to 7.006172MHz to get rid of some noise we saw already yesterday in the 7MHz digitally demodulated signal.
Today we were able to observe a clear error signal for the squeezer phase.
After this we also managed to close the coherent control loop and measured a plant transfer function and a time delay in the chain of 1ms.
The origin of this time delay needs to be investigated in order to achieve higher loop bandwidth.
At the end of the shift we prepared the squeezer for being switched back to deliver the bright alignment beam (BAB).
