The quote from "dispcal" and "dispread" help files: "The -H option turns on high resolution spectral mode, if the instrument supports it, such as the Eye-One Pro... This may give better accuracy for display measurements." When is it possible? P.S. I've compared high resolution spectral mode vs. normal spectral mode on some popular display types (CCFL- and LED-backlit; standard and wide gamut). There was not evident collorimetric difference between Hi-Res and Normal modes. Max deltaE [CIE 1994] was less than 0.3 P.P.S. I used an i1Pro (Rev. D).