No fringes found to Ww during observation.
All DBBC/Fila10g modes, IF settings checked out manually and found to be in agreement with setup commanded in the drudg'd proc file.
Was initially concerned about commanded DBBC form = geo2 but later found that this is a legitimate setup associated with V106 version of the DBBC software that is running on the Ww DBBC.
Exact same config was fine (i.e. Fringes found) in later experiments v605a, v569b so no clear idea of what the issue was/is?
Clock offset ~ 42.78 us at start of experiment.