Load CBE, set SMU to sensible values. Point and focus on a spectral line standard source. IF power LED's for obvious instability in either or both channels. Do calibration and check results are sensible. Go to standard spectral line target and do a 2-minute integration in recommended manner.
Check result against standard, or consult representative spectra if necessary.
A different line shape would be suspicious. See below for that. B3 monitor screen and terminal server. The initial appearance of the B3 monitor screen is quite garbled. It needs updated information from the B3 micro, and this is not available until the VAX B3 task is completely loaded or until the B3 micro is rebooted.