|Display Test System
||ATI Radeon 64 DDR |
||Windows 98 SE |
Colour: 32 Bit
Excellent, no visible distortion at outside
Contrast: Excellent contrast and
brightness - 1% to 9% black test patterns are well represented with distinct
separation in intensity. Same goes for 20% to 100% white. Only visible problem
occurs with bright white test pattern on mostly black background. A slight halo
exists around the white test pattern from the phosphor.
During the test, some movement was seen in the vertical trace lines on
par with most displays of this size. Horizontal trace lines remained very
stable during the three-bar test.
Colours: Green and white were displayed
excellently, blue was very good, and red (as always seems to be the case with
hitachi CRT's) was ever so slightly washed out.
Convergence: Very good at center, outermost lines
exhibited a slight loss of convergence so line artificially appears wider on
white test grid. Purple test grids very good with slight loss of convergence on
blue at outer edge in center of display. The yellow and light blue test grids
were represented excellently. The RGB grid demonstrated a loss of
convergence at the outer edges.
Focus: Very good in center and outside
edges. It was unusual to see the vertical 1-pixel lines so sharp.
Resolution: Central test pattern
excellent, outer edge test patterns very good. Vertical 1 pixel lines are very
clear - this is usually an area whith difficulties.
Moire: Very good. Some slight
masking effects on the 1-pixel test
None visible at
The Hitachi CM821F supports a very broad range
of resolutions. The full list of manufacture supported resolutions and frequencies are