The lastest noisebudget is attached.  Here is the online Bokeh version.

We are reaching the levels that Evan and Tara reached in a small frequency region around 1 kHz.  We are supposed to do about 10 times better than them to reach the coating brownian noise floor for the AlGaAs coatings.

We took the PLL OLG via the SR785, as well as the transmission beatnote spectra.  I divided every spectrum by two because of the impedence matching effect.

The PLL was locked at 1 kHz/Vrms frequency modulation, and SR560 preamp gain of 2000.  This led to the PLL UGF of around 30 kHz.  With this high of a UGF we used the control signal to take the spectra, and set the Preamp Gain in calibratedBeatnoteSpectrum.py to one.

Tomorrow awade and I will set up the intensity stabilization servo to try and get even lower noise on transmission.  The error signal from the North cavity is breathing in an unusual way, and we hope to get rid of this excess noise.