Sheila, Ryan S, TJ

Today we went down to EX and looked at the UGFs for the PLL and the PDH, and then the I/Q ratio. To do this we connected the SR785 to the correct common mode chassis (Sheila knew which was which as labels were lacking), and then turned on the test output on the medm screen. We then looked at the I/Q ratio and adjusted the demod phase (H1:ALS-X_REFL_A_PHASE_PHASEDEG) to increase this ratio. Started at around 12.5dB @120deg and ended up at 115deg as the ratio become nonsensical with Q approaching 0 (picture). This value is now saved in SDF.

This isn't a large change, so we don't expect to see much of a difference but it will be good to compare this to EY when we get a chance to get down there.