ViewSonic EA771B User Guide - Page 13

Timing Chart The ViewSonic EA771/EA771B digital monitor can run at an extensive range of resolutions and refresh rates. Certain standard resolutions are factory preset. There are also 10 timings which are user definable. For example, if your video card is set up to run 1024 pixels x 768 lines at an 80 Hz refresh rate, once you have adjusted the screen size and position to your preferences, the monitor will save this information to memory. Every time you run this resolution at this refresh rate, the monitor will recall your adjustments. The following table lists the maximum refresh rates at which the ViewSonic EA771/EA771B will operate at a number of standard resolutions. While the monitor is capable of this level of performance, not all video cards are Wr capable of running at these high refresh rates. Please see your video card user's guide to ensure compatibility. Warning: Do not exceed the maximum refresh rate listed in the table below for your monitor. Doing so may result in permanent damage to the monitor. Some graphics cards support refresh rates higher than the monitor is capable of handling. User Definable Timings Resolution pixels x lines Maximum Refresh Rate Hz 640 x 480 120 800 x 600 110 1024 x 768 87 1280 x 1024 66 All resolutions are non-interlaced. Video Timing The video timing mode is made up of three elements: 1 The resolution is the number of data pixels times the number of data lines that make up the screen. 2 The horizontal frequency is the speed that the electron beam travels across the screen, left to right. 3 The vertical frequency, or refresh rate, is the speed that the electron beam finishes all the rows in the screen and returns to the top. ViewSonic EA771/EA771B Operation