Test Bench: Vizio P50HDTV 50-inch Plasma HDTV

Color temperature (Movie preset before/Custom preset after): 20 IRE: 9,412 K/5,667 K 30 IRE: 9,477 K/6,333 K 40 IRE: 9,804 K/6,518 K 50 IRE: 9,970 K/6,403 K 60 IRE: 10,042 K/6,421 K 70 IRE: 10,068 K/6,577 K 80 IRE: 10,102 K/6,558 K 90 IRE: 10,139 K/6,605 K 100 IRE: 10,193 K/6,657 K Brightness (100-IRE window before/after): 46.3/33.6 ftL

With its Movie picture mode active, the Vizio P50HDTV's grayscale measured far off from the 6,500-degree kelvin standard, displaying a too-blue picture throughout its entire range. After calibration using the red, green, and blue controls in the Custom Color submenu, grayscale tracking measured within ±167 K of the standard from 30 to 100 IRE - average performance. I measured -15% color-decoder error on the green channel through the HDMI inputs, a fairly high amount that may have contributed to the set's slightly weak color saturation when those connections were used. The component-video inputs, in contrast, showed only a mild -5% red error. Red and blue color points proved reasonably accurate, although green measured as more of a yellowish green.

Overscan - the amount of picture area cut off at the edges of a TV's screen - measured 4% for both the HDMI and component-video inputs, which is an average amount. And 720p-format test patterns were displayed with full resolution via both the HDMI and component-video connections. Various 480i-format tests from the Silicon Optix test disc showed solid 2:3-pulldown detection, sharp picture detail, and only minimal "jaggies," although the disc's noise-reduction tests provoked visible "ghosting" when the set's Motion noise-reduction setting was enabled.

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