1. Placement at the top or bottom of the disk gives horizontal scan lines. 2. The required horizontal scan frequency for the Tandy 2000 is 26.4 kHz. 3. Ancillary data can be located in non-picture portions of horizontal scan lines. 4. The increased resolution over D1 comes as a result of a longer horizontal scan . 5. The low level interface of input / display enable, horizontal scan direction and vertical scan direction signals. 6. Vertical retrace is comparatively slow, occurring over a span of time required for several tens of horizontal scans . 7. A resonant circuit is commonly employed, restricting the allowable horizontal scan rates to one or more very narrow ranges. 8. This rate can be increased with the ECS and AGA chipsets by using a video mode with higher horizontal scan rate. 9. Thus the interfering frequency may lie far from the horizontal scan frequency . talk ) 13 : 24, 8 February 2010 ( UTC) 10. While stand-alone LCD monitors generally accept a wide range of horizontal scan rates, the same is not true of the vertical scan rate.
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