NVIDIA FX1300 User Guide - Page 157

Chapter 7 Configuring Key ForceWare Graphics Driver Features Table 7.1 Advanced Timing Parameters (continued) Advanced Timing Parameter Description Refresh rate Active pixels Interlaced mode Pixel clock Refresh rate indicates how many times per second the electron beam in the picture tube is moved from top to bottom in the case of a CRT (analog display), or more generally, the frequency at which the entire screen is refreshed. Specify the frequency at which your entire screen is refreshed, or retraced, to prevent the image from flickering. Note: This frequency is limited by the display's maximum horizontal scan rate and the current resolution, as higher resolution implies more scan lines. Note: The value should not exceed the display's maximum vertical scanning frequency. Indicates the number of all visible pixels in one vertical line. Interlaced mode refers to interlaced scanning, which is a method of sending the image to your display where even scan lines are drawn during the first field in a frame and odd scan lines are drawn during the second field in the frame. Note: Also see the explanation for -I (interlaced scanning) on page 146. Unlike the progressive scanning method, where all the scan lines are updated in each frame, interlaced scanning results in a higher frame rate but usually causes image flicker. Unlike the progressive scanning method, where all the scan lines are updated in each frame, interlaced scanning results in a higher frame rate but usually causes image flicker. Pixel clock indicates how many millions of pixels are output per second. In other words, this is the frequency at which the display receives pixels from the graphics card. The value typically lies within a range 10 to 360 MHz, or the DAC maximum value. • EIA‐861B timing parameters, such as 861B (1920 x 1080 @ 59.94) -I and 861B (1920 x 1080 @ 59.94) -P Note: EIA (Electronic Industries Alliance) 861B timings refers to a CEA/EIA standard that consists of display timing and formats that allow the graphics card to connect to Consumer Digital Televisions over a DVI connection and configure itself for the optimum settings of that display. • 861B refers to an EIA/CEA standard and would apply to certain 861 High Definition television (HDTV) displays. • ‐P means "progressive scanning," which is a method of sending an image to your display where all the scan lines are updated in each frame ‐‐‐ in other words, all of the scan lines are displayed sequentially. This method, used in modern computer displays, generally reduces flicker in the displayed image and results in smoother motion for videos. • -I means "interlaced scanning," which is another method of sending the image to your display where even scan lines are drawn during the first field in a frame and odd scan lines are drawn during the second field in the frame. Another way to explain this method is that two passes are used to paint an image on the NVIDIA Corporation 146