Attached is the plot of the high power oscillator PZT voltage.  The last voltage step coincides
with when the input modecleaner and reference cavity lost lock.  The first step in voltage coincides
with my deliberate adjustment of the slow voltage to lock the reference cavity to a different fringe.

    All this was to find a place where the FSS would be relatively okay with the input modecleaner
losing and acquiring lock.  Apart from one or two FSS oscillations when the input modecleaner lost
lock, all the PSL servos appear okay.