[Note: post copied from main V2500 discussion thread]V2500 PC/Laptop HDMI and VGA testing/calibrationI. ResolutionsVGA (horizontal x vertical, aspect ratio)
1400 x 1050p, full
1280 x 768p, wide
1280 x 1024p, full
1024 x 768, full
800 x 600, full
640 x 480, full
Note: nvidia set to Discrete Monitor Timing (DMT) for the above. Choose Auto Adjust on V2500.DVI->HDMI
1920 x 1080p, wide
accepts lower input resolutionsII. Grayscale calibration using "Reference White (Black) Calibrator 1280x768.gif"VGA
Default settings calibrated. Display Mode = Text, Backlight = 3, Picture = 80, Brightness = 50, Color Temp = Neutral.DVI->HDMI
Standard: Backlight = 3, Picture = 80, Brightness = 65, Color = 50, Temp = Neutral.
Custom: Backlight = 3, Picture = 80, Brightness = 70, Color = 50, Temp = Neutral. Advanced: Color Space = Wide, all else off.
Note: Sharpness = Min and Noise Reduction = Off for Standard and Custom. When Picture or Brightness is pushed past around 80, it causes the white scale to begin to appear beige rather than gray/silver. This happens with both the HDMI and VGA input. The Brightness settings seem precise. A change to a lower value caused the background to appear to change. All bars, black and white, between 0 and 255 show up with Custom. Standard is very close, and its Brightness is the best for it. I don't know why Standard and Custom differ slightly, but they do. All settings in Advanced for Custom are off except Color Space set to Wide, and it doesn't account for the Brightness setting difference. In any case, Custom seems best, and Standard is very, very close.III. Calibration using the GetGray DVD and PowerDVDVGA
: Black went up to reference black (16), white down to reference white (235).DVI->HDMI
: The same as for VGA.
Note: DVD software players (at least PowerDVD) appear to automatically set Video RGB levels.IV. Testing using the Phillips Test Pattern Generator at 1280 x 768, zoom normal or full.VGA
: Failed the multi-burst and cross talk patterns. There were dramatic, headache inducing, shimmering and column-creating effects with vertical bars as large as 5:5 white to black pixels. No such effect was seen for horizontal bars. Think of a box with thin black (or white) vertical bars. Instead of appearing gray due to the pattern, the box shimmered and appeared to be a series of columns with alternating very dark vertical and white bands.HDMI
: Passed all tests including the above. Single pixel vertical lines appeared solid and created a uniform gray appearance at a distance. Zooming showed minimal scaling effects, only those to be expected at a single pixel level (you can't scale to a fraction of a pixel).V. Conclusion
DVI->HDMI input on the V2500 is superior to its VGA input at the same resolution due to vertical noise/cross-talk. VGA shows its analog nature even with heavy gauge cables. No problems were seen with the DVI->HDMI input which appeared stable, crisp and clear while matching patterns 1-1 down to the single pixel level.VI. Reference Linkshttp://www.softpedia.com/get/Tweak/...Generator.shtml
reference calibrator 1280x720.zip 131.4365234375k . file