Daniel, Naoki, Nutsinee

We installed a new VCO that allows us to increase the gain in the CLF loop (was 4kHz with 20 degree phase margin with the old VCXO). The box sits in the left SQZ rack U35. Below is the old VCO. CLF is now running at ~13kHz UGF with 40 degree phase margin. VCXO interface isn't working quite right but that doesn't stop us from locking the CLF. The "ON" switch is the excitation switch at the moment. The VCO control currently has a wrong sign and can't be turned on but it can be tuned by hand. CLF common mode board is now operating at -16dB common path gain with all three boosts on (no compensation). All relevant changes has been accepted in the SDF.

A quick look at the CLF noise (QMON) at 10 kHz tells us that we are now a factor of 5 better than last year. The Vpp calibration is 5V/rad.

Unrelated to this work we commented out OPO common gain in the guardian and have SDF take care of the gain value instead. We also accepted the PMC trans nominal value.