The feed forward from the PSL VCO to the SQZ VCO has been setup. The feed forward is taken from the PSL VCO control signal and injected into the excitation input of the SQZ VCO. There is a factor of 20 gain difference between the tune input and the excitation input. However due to the Pomona box which implements a pole using a 15.8K resistor and a 10u capacitor and due to the difference amplifier at the excitation input the actual gain is 20/0.7793 = 25.66.
The feed forward reduced the frequency difference between the 2 VCOs by at a factor 10-20, when the squeezer is on PREP_IFO (no LO loop).
With the squeezer locked, we can compare a previous lock with a new lock. The improvement is around a factor of 15.