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Hitachi CM821F 21 inch Flat Face Monitor Review

Hitachi CM821F 21 inch Flat Face Monitor Review - PCSTATS
Abstract: ErgoFlat Technology Invar Shadow Mask CRT, advanced extended elliptical aperture, multi-step dynamic focus tube, and an anti-static, anti-glare coating.
Filed under: Monitors Published:  Author: 
External Mfg. Website: Hitachi Sep 20 2001   Max Page  
Home > Reviews > Monitors > Hitachi CM821F

Monitor spec sheet and display evaluation criteria

Hitachi CM821F Specs

Picture Tube 21" CRT, ErgoFlat Technology, Invar Shadow Mask CRT. Advanced Extended Elliptical Aperture, Multi-step Dynamic Focus tube. High contrast, anti-static, anti-glare coat
Synchronization 31-107 kHz, 50 - 160 Hz
Resolution 1856 x 1392 pixels
Signal Cable Dual 15-pin
Video Clock 230MHz typically
Viewable image size 406mm x 305mm (20" diagonally)
Colour Temperature 9300K, 6500K, 5000K, user defined
Warm-up time 30 minutes
Power Consumption 120W, 15W standby
Power 120/240 V (auto adjusting), 50/60 Hz. 120W typical. 15W Max at standby, 3 W max at power off
Weight 67lbs
Dimensions 19.2” W x 19” H x 18.7” D

Pcstats CRT Display Evaluation Criteria:

To aid our evaluation of Cathode Ray Tube based displays we work with a program called Nokia Monitor Test. The software has been designed specifically to help with the proper configuration of any display, but also has the added benefit of illustrating deficiencies in the quality of image being presented.

While glaringly obvious problems would be immediately obvious to anyone looking at a simple page of text, the monitor test program stresses the display to the 'limit'. By doing this we can see exactly where the strengths and weaknesses of a particular display lie.

The program consists of twelve multi-screen tests, each designed to test one particular facet of a displays' qualities. An example from each of the test-screen is shown below.

Geometry

Resolution

Brightness/Contrast
High Voltage

Moire

Colour
Convergence

Jitter

Focus

Readability

Note: We let the monitor warm up for at least 30 minutes before attempting to perform our visual tests on the quality of the picture display. This gives the CRT time to reach optimal operating conditions.

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Contents of Article: Hitachi CM821F
 Pg 1.  Hitachi CM821F 21 inch Flat Face Monitor Review
 Pg 2.  — Monitor spec sheet and display evaluation criteria
 Pg 3.  Review Notes: Quality of the Hitachi display
 Pg 4.  The on screen display menus
 Pg 5.  Conclusions on the CM821F display

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