J. Kissel, J. Driggers, T. Schaffer

After a very quick transition through ALS (nice!) we were stuck trying to get through DRMI 1f lock acquisition. After all of the usual tricks of taking SRM out of the equation, touching up alignment here and there, we began to be suspicous of beckhoff settings of our error signal photodiodes, as just about all of our problems have been this evening. Gains, whitening filters, all checked out. However, finally just *looking* at the error signal in dataviewer, we saw little to nothing. Jenne caught it -- the REFL shutter on ISCT was closed (similar to the earlier shutter gotcha LHO aLOG 22696).

40 mins ... *flush*