The maximum useful addressablity of CRT based monitors can be a little more difficult to determine. A computer may have a graphics controller capable of producing 1280 by 1024 pixel display images but a low cost 14 inch monitor that is only able resolve a 640 by 480 image. This table shows typical resolution capabilities based upon screen size and RGB triad pitch of CRTs. A flexible metal or plastic ruler can be used to measure the CRT screen display area. As with all display tests, be sure user accessible adjustments are set per manufacture directions.
Black text is shown on a white background and white text on a black background.
Adjust the browser to show smallest font sizes. Look in the View menu for a text size selection and choose the smallest setting. Better video controller cards automatically anti-alias text. To do a fair comparison between monitors use the same type of video card to drive both displays being compared. Tonal Resolution Video Signal Ringing - Older, lower quality monitors may use video circuitry that creates a ripple effect called ringing .