changing SA3 mono from grating to blank while having the und to mono synchronization running apparently caused the und photon energy to change to 680eV. the synchronization MDL went into pink-disable when changing mirror settings, so this change in photon energy should not have occurred.

After going back to 940eV, the SASE level did not come back. BKR tried to tackle this for some while until they asked for intervention of the MRC.