USB4000 is repaired and recalibrated. its calibration done by oceanoptics is checked. it's good within its resolution of 0.1nm 

USB4000 has 0.1nm resolution, HR4000 has 0.02nm resolution
the FWHF is at about 0.3nm by HR4000 and 0.5nm by USB4000

the peak position oscillation is the same about 0.2nm for difference LD temp

LD temp		avergae position
25C		794.5		
27C		794.65
29C		794.8