The X end PLL is locked. 

The laser settings are: 1.842 Amps and 31.77 C, with these settings the temperature can be adjusted to move the beat note +/- 400MHz with no evidence of mode hopping. 

The gain settings are -8 for fast gain, -4 for common gain, giving a ugf of 13.6kHz (open loop gain first photo).  I first locked with a fast gain of -5, commong gain -4, ugf 17kHz, but this resulted in some oscillations at 200kHz, shown in the second attached photo.  these are gone with the lower ugf, 3rd photo. 

The frequency comparator is not working well, for now we can lock using the ceiling camera to look at the spectrum analyzer, but not the autolocker which relies on the readback of the beat note frequency.  This readback is OK when the loop is locked, but not verry usefull otherwise. The problem is probably that we are sending 20dBm into the timing comparator for the VCO readbacks, and our signal is more like -30dBm on the adjascent channel.  We encountered this problem at end Y and fixed it by adding attenuators.  I gues that we need to add the final solution to the issue tracker so livingston doesn't have the same prolem.