I am working with a Mitsubishi rear projector. This is the WD-82837, a 2009 82" with a dynamic iris that not defeatable.
I have a Ceton cablecard and have gone to whole house video around the Ceton. Anyway, my sources are now 99 percent PC. The PC I am using on the Mits as a source has an intel iGPU. The downside of the PC is that it is not as sharp as your typical CE device.. there is an odd upside for my display. The intel iGPU clips completely above white and below black. Actually it clips below 18 so there is a bit of contrast loss.
Anyway, my set clips green in the above white badly at reasonable contrast levels so clipping above 235 is fine by me.. what is not displayed can not be discolored.
I used the APL patterns both grayscale and 75% color. The results were interesting. I found that color appeared much more saturated than when done with window patterns. I especially noticed that SD commercials inside HD broadcasts looked much more correct than in the past. I did not notice that much difference in the numbers. I did make some adjustments to grayscale, gamma and gamut but they seemed quite minor numerically but the result was a much better calibration.
Oh if only, ChromaPure could use the AVS disc patterns on a PC and auto-calibrate with the DUO or Radiance. I do a base calibration with the DUO and auto-calibrate. I then make some adjustments in the TV's CMS run auto-calibrate again. Then I use the ASV patterns on the PC and adjust again using the DUO and the TV's built CMS.
The results look quite nice. Now my display is not the sharpest out there and stock renderer in Windows Media Center does not produce the same results as the best CE Devices but it looks pretty darn good with much thanks to the AVS 709 APL patterns.
Samsung 78" JS8600, Mits WD-92840 43" Samsung 43ku7000 - Lumagen Radiance XS, Martin Logan Motion 40s, Ascend Sierra 2s
58" Panny Plasma -DVDO DUO, Usher S520, JBL HLS-610, Definitive SM45, MusicHall Marimba