(Georgia, Corey)

4:30:01 - 4:31:50:  Out of OBSERVING

Once again noticed the symptom of a noisy DARM spectra above 2kHz.  With Georgia on the phone, we bumped H1 out of OBSERVING, to ramp the Common Gain up 1dB from 24 to 25 (this was enough to fix DARM).  

Georgia mentioned this is due to the PSL Ref Cab transmission dropping (usually around 4V, but now it is on a downward trajectory [currently at 1.8V]); Hoping we can last until Tues to fix this via the picomotors, but in the meantime the fix, once again is inching the Common Gain up.

If this appears again, one can click this gain up 0.1 steps at a time (while H1 is locked) & watch DARM as you go (it should drop the high frequency noise).  You know you've gone too far if the PZT MON on the FSS medm starts to look noisier.