ETMX is misbehaving again. I went to go squish his cable at the rack and at the satellite box, but it still happened at least once.
Anecdotally and without science, it seems to happen when ETMX is being asked to move a "big" amount. If I move the sliders too quickly (steps of 1e-3, but holding down the arrow key for about 1 second) or if I offload the ASS outputs when they're too large (above 10ish?), ETMX jumps so that it's about 50 urad off in yaw according to the oplev (sometimes right, more often left), and either 0 or 50urad off in pitch (up if right in yaw, down if left in yaw).
So far, by-hand slowly offloading the ASS outputs using the sliders seems to keep it happy.
I would ask if this is some DAC bit flipping or something, but it's happening for outputs through both the fast front ends (ASS offloading) and the slow computers (sliders moved too fast). So. I don't know what it could be, except the usual cable jiggling out issue.
Anyhow, annoying, but not a show stopper.