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Hitachi CM828 21 inch CRT Monitor Review
Hitachi CM828 21 inch CRT Monitor Review - PCSTATS
Abstract: The CM828 is higher-end display that sports an even nicer display tube than the very economical CM810.
 86% Rating:   
Filed under: Monitors Published:  Author: 
External Mfg. Website: Hitachi Aug 01 2001   Max Page  
Home > Reviews > Monitors > Hitachi CM828

Review Notes: Quality of the Hitachi display

Display Test System Configuration:
Video Card: ATI Radeon 64 DDR
Operating System: Windows 98 SE
Display Settings: Color Temp: 6500 Kelvin
Resolution: 1600x1200 pixels
Frequency: 85Hz
Colour: 32 Bit

Geometry: Excellent geometry, the CM828 showed no visible distortion of any of the test grids.

Brightness / Contrast: Brightness was excellent under 32bit colour. Under 16-bit colour the range of black shades was not represented as well as the previous setting was able to. Contrast was excellent, the whites were displayed brightly and the blacks were vividly absent of luminosity.

High Voltage: The horizontal trace lines remained stable during the three-bar test while the vertical trace lines flexed ever so slightly. Overall the dampening control is quite good.

Colours: For some reason, the colour red always seems to me to be a bit under represented by Hitachi displays, while green and blue are always very vibrant. Perhaps it is the dark tint on the display that seems to mute red ever so slightly. Anyhow, it is by no means a handicap. Also, the glass of the display causes the outer edges of the display to be a bit darker than the center, so brightness distribution is not completely equal.

Convergence: The convergence test displays a range of coloured grids (white, purple, yellow, aqua and RGB) to test the convergence of the three component colours which form the basis for all displays - red, green and blue. We noticed a slight loss of convergence at the bottom edge of the screen, but to a very minor degree. Overall the display showed excellent characteristics in this regard.

Focus: Very good focus, especially in the horizontal axis. The closely spaced parallel vertical lines showed slight blending, which is more pronounced at the outside corners where they almost seem to blend into one line at the 1600x1200 resolution. Still, the CM828 exhibited much focus than the CM810 did.

Resolution: Very good - horizontal lines were all sharp and distortion free. Vertical lines were also very good, though once again the closely spaced single pixel separated lines appear to blend in together some what, especially at the outside edges.

Moire: Solid grey -excellent. Light Grey - excellent. Vertical 1 pixel lines - very good, only slight herring bone pattern on the outside 1/4 edge of screen. Horizontal 1 pixel lines - excellent. Two pixel square pattern - excellent. One pixel square pattern - excellent.

Readability: Readability is just about as good at the center as it is at the outside edges, ranking overall as very good.

Jitter: None visible at all.

Display Resolutions: The Hitachi CM828 supports a very broad range of resolutions. The full list of manufacture supported resolutions and frequencies are listed below:

Display Resolutions:
Resolution Freq Hor. Freq Ver. Standard
640x480 31.5kHz 70Hz VGA
800x600 53.7kHz 85Hz VESA
1024x768 68.7kHz 85Hz VESA
1152x870 68.9kHz 75Hz MAC
1280x1024 91.1kHz 85Hz XGA
1600x1200 106.25kHz 85Hz XGA
1600x1200 112.0kHz 90Hz XGA
1920x1440 112.5kHz 75Hz VESA
2048x1536 113.64kHz 71Hz -

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Contents of Article: Hitachi CM828
 Pg 1.  Hitachi CM828 21 inch CRT Monitor Review
 Pg 2.  spec sheet and display evaluation criteria
 Pg 3.  — Review Notes: Quality of the Hitachi display
 Pg 4.  the on screen display menu:
 Pg 5.  Conclusions on the CM828 display

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