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Samsung SP-A800B DLP Projector:
Settings
Picture Menu Contrast & Resolution All measurements were made with ~90 hours on the lamp. Mode: Movie1, Lamp: Theater, DynamicBlack: Middle Peak white level
Black level: 0.009fL Mode: Movie1, Lamp: Theater, DynamicBlack: Deep Peak white level
Black level: 0.007fL Mode: Movie1, Lamp: Theater, DynamicBlack: Auto Peak white level
Black level: 0.005fL Overscan (Overscan control Off)
Horizontal bandwidth at 1080i
I noted one peculiarity via the component input, which may or may not have been a sample flaw. At 480i, 480p, and 1080i (but curiously not 720p), the image quivered up and down intermittently by a few pixels. This was hard to spot from a normal viewing distance, but quite obvious when viewed from close to the screen. The response via both component and HDMI remained strong across the board to the maximum limits with the exception of merely average chroma (color) resolution via HDMI at 1080i. Grayscale & Color Temperature
Unlike the grayscale measurements in most of our reviews, the Before result shown here reflects the grayscale following a service-menu calibration as described in the text. (The projector is generally sold and installed with the understanding that such a calibration will be performed.) I then measured with white window test patterns from a DVD source.
The After results show how the calibration can be changed by fine tuning the input-specific RGB Gain and Offset controls in the user menu—that is, by adjusting them for a specific source. In this case, the differences shown are minimal and visually irrelevant—some might even argue that the service-only adjustment is superior. In either case, there's nothing to criticize in the Samsung's grayscale performance.
Before adjusting the RGB Gain and Offset controls, the color balance was essentially perfect...
...and it remained essentially perfect after adjusting those controls.
The color temperature was essentially perfect before tweaking the RGB Gain and Offset...
...and after the adjustment as well. Color Accuracy
The CIE chart shows how the measured result in the projector's SMPTE-C Color Standard setting (white triangle) compared to the HD (Rec.709) gamut (black triangle). The projector's calibrated SMPTE-C color gamut is slightly smaller than the Rec.709 standard, as expected.
Setting the Color Standard to HD, the red saturation increased to the HD standard point, and blue got closer to its standard, while the green point remained the same as before—that is, slightly undersaturated. Still, this is way closer than most projectors I've seen.
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