Kramer Electronics 840 840 is a high performance DVI video test pattern generator. It displays 32 preset patterns at 12 popular computer video resolutions including several unique patterns incorporating motion. Output - DVI-D signal (on a DVI-I connector) at SVGA (800 X 600), XGA (1024 X 768), and SXGA (1280 X 1024), 1400 X 1050, UXGA (1600 X 1200), 852 X 480, 1280 X 720, 1366 X 768, 960 X 540, 720 X 480, 1920 X 1080, 1920 X 540 (selectable) all at 60Hz. Patterns - 32. Compact Kramer TOOLS - 3 units can be rack mounted side-by-side in a 1U rack space with the optional RK-3T rack.