[Jenne, Stefan]

The DRMI acquisition has been frustrating enough lately that I spent a little time trying to get the PRMI to DRMI transition to work again.  Middling success, but not enough to code it up yet.

Here's what semi-worked:

Lock PRMI.  Put in 2500 count MICH input offset, to move to a gray fringe.  Remove SRM's pitch misalignment, leaving the 1290 urad yaw misalignment.  Walk the SRM yaw misalignment to 400 urad misalignment.  At this point you can start to see the fringing on the AS camera.  Move the SRM a little closer, to about 300 urad.  Zero the SRCL1 gain (noting its nominal value of -30 for DRMI acquisition), and enable the input and output.  Ramp SRCL1 gain to -1, then -3.  Bring SRM yaw misalignment down in steps of 20 urad. 

Once, this worked, and we had a SRCL lock with SRM still misaligned in yaw by 270 urad, and once we lost lock.  We should try again some day, starting with this knowledge.