APPENDIX
SIGNAL TIMING CHART
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Vertical | |||
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| IBM |
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| VESA |
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| VGA1/7OHz | VGA2/70Hz | VGA3/60Hz | XGA/87iHz | 640/72Hz | 800/56Hz | 800/60Hz |
| 640/75Hz | |
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| 640x350 | 720x400 | 640x480 | 1024x768 | 640x480 | 800x600 | 800x600 |
| 640x480 | |
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fH (kHz) | 31 469 | 31 469 | 31 469 | 35 522 | 37 861 | 35 156 | 37 879 | 37.500 | ||
A µsec | 31.778 | 31.777 | 31.778 | 28.151 | 26.413 | 28.444 | 26.400 | 26.667 | ||
B µsec | 3.813 | 3.813 | 3.813 | 3.920 | 1.270 | 2.000 | 3.200 | 2.032 | ||
C µsec | 1.907 | 1.907 | 1.907 | 1.247 | 4.064 | 3.556 | 2.200 | 3.810 | ||
D µsec | 25.422 | 25.422 | 25.422 | 22.806 | 20.317 | 22.222 | 20.000 | 20.317 | ||
E µsec | 0.636 | 0.636 | 0.636 | 0.178 | 0.762 | 0.667 | 1.000 | 0.508 | ||
fv (Hz) | 70.086 | 70 087 | 59.940 | 86 958 | 72.809 | 58 250 | 60 317 | 75.000 | ||
O msec | 14.268 | 14.268 | 16.683 | 11.500 | 13.735 | 17.778 | 16.579 | 13.333 | ||
P msec | 0.064 | 0.064 | 0.064 | 0.113 | 0.079 | 0 057 | 0.106 | 0.080 | ||
Q msec | 1.907 | 1.080 | 1.048 | 0.563 | 0.739 | 0.626 | 0 607 | 0.427 | ||
R msec | 11.122 | 12.711 | 15.253 | 10.810 | 12.678 | 17.067 | 15.840 | 12.800 | ||
S msec | 1.176 | 0.413 | 0.318 | 0.014 | 0.237 | 0.028 | 0.026 | 0.027 | ||
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Clock Fre. | 25.175 | 28.322 | 25.175 | 44.900 | 31.500 | 36.000 | 40.000 | 31.500 | ||
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Polarity |
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H. Sync. | Positive | Negative | Negative | Positive | Negative | Pos./Neg. | Positive |
| Negative | |
V Sync. | Negative | Positive | Negative | Positive | Negative | Pos./Neg. | Positive |
| Negative | |
Remark |
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| Interlaced |
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