Alexa, Dan, Koji

Using a laser pointer we were able to verify that the four quandrants on each OMC QPD were behaving correctly.  We found that the diodes were rotated 90deg from the expected orientation.  Koji says this should not be possible given the pinout structure of the diodes, maybe there's something in the cabling between the diode and the ADC.

With confidence in the diodes, we used OM2 and OM3 to walk the beam through the OMC.  We observed that the flashes we saw on QPDA yesterday were due to some terrible clipping of the main beam inside the OMC, and using a card and IR viewer we were able to bring the correct beam into the QPD path and center the beam on the OMC QPDs.  Success!  The sliders on OM2 and OM3 are in the hundreds of counts, which is not terrible but needs to be offloaded eventually.

Right now the beam to the OMC cavity is off in yaw, and the OMC REFL beam is too high in pitch, enough that we can't compensate with the mirrors on the table.  We may need to adjust the fixed steering mirror (in a lens holder).

We are close to using the OMC PZT, so we'll need the high voltage to be enabled.