Dell 1800FP Service Manual - Page 4
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VIDEO SYNC TIMING CHART B A C E F D > Mode 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 H/V Sync Dot Sort Polarity Clock Frequency Total Period Video Active Time (E) (A) H+ 31.469 800 640 25.175 V- 70.09 449 350 H - 28.321 31.468 900 720 V+ 70.08 449 400 H- 31.469 840 640 25.175 V- 59.94 525 480 H- 37.5 840 640 31.5 V- 75 500 480 H- 43.269 832 640 36.0 V- 85.0 509 480 H+ 37.879 1056 800 40.0 V+ 60.317 628 600 H+ 46.875 1056 800 49.5 V+ 75.0 625 600 H+ 53.674 1048 800 56.25 V+ 85.061 631 600 H +/- 49.725 1152 832 57.283 V +/- 74.55 667 624 H- V- 65.0 48.363 60.0 1344 806 1024 768 H- 60.123 78.75 V- 75.029 1312 800 1024 768 H+ V+ 94.5 68.677 84.997 1376 808 1024 768 H +/- 67.500 108.0 V +/- 75.000 1600 900 1152 864 H +/- 61.805 V +/- 92.978 65.96 1504 937 1125 900 H+ 63.981 V + 108.0 60.02 1688 1066 1280 1024 H+ 79.976 135.0 V+ 75.035 1688 1066 1280 1024 Front Porch (C) 16 37 18 12 16 10 16 1 56 1 40 1 16 1 32 1 32 1 24 3 16 1 48 1 64 1 18 2 48 1 16 1 Sync Duration (D) 96 2 108 2 96 2 64 3 56 3 128 4 80 3 64 3 64 3 136 6 96 3 96 3 128 3 134 4 112 3 144 3 Back Porch (F) 48 60 54 35 48 33 120 16 80 25 88 23 160 21 152 27 224 39 160 29 176 28 208 36 256 32 200 31 248 38 248 38 Resolution 640x350 70Hz 720x400 70Hz 640x480 60Hz 640x480 75Hz 640x480 85Hz 800x600 60Hz 800x600 75Hz 800x600 85Hz 832x624 75Hz 1024x768 60Hz 1024x768 75Hz 1024x768 85Hz 1152x864 75Hz 1152x900 65Hz 1280x1024 60Hz 1280x1024 75Hz -4-