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Preset Timing Modes
If the signal transferred from the computer is the same as the following Preset Timing Modes,
the screen will be adjusted automatically. However, if the signal differs, the screen may go
blank while the power LED is on. Refer to the video card manual and adjusts the screen as
follows.
Display Mode Horizontal
Frequency
(kHz)
Vertical Fre-
quency (Hz)
Pixel Clock
(MHz)
Sync Polarity
(H/V)
IBM, 640 x 350 31.469 70.086 25.175 +/-
IBM, 640 x 480 31.469 59.940 25.175 -/-
IBM, 720 x 400 31.469 70.087 28.322 -/+
MAC, 640 x 480 35.000 66.667 30.240 -/-
MAC, 832 x 624 49.726 74.551 57.284 -/-
MAC, 1152 x 870 68.681 75.062 100.000 -/-
VESA, 640 x 480 37.861 72.809 31.500 -/-
VESA, 640 x 480 37.500 75.000 31.500 -/-
VESA, 800 x 600 35.156 56.250 36.000 +/+
VESA, 800 x 600 37.879 60.317 40.000 +/+
VESA, 800 x 600 48.077 72.188 50.000 +/+
VESA, 800 x 600 46.875 75.000 49.500 +/+
VESA, 1024 x 768 48.363 60.004 65.000 -/-
VESA, 1024 x 768 56.476 70.069 75.000 -/-
VESA, 1024 x 768 60.023 75.029 78.750 +/+
VESA, 1152 x 864 67.500 75.000 108.000 +/+
VESA, 1280 X 768 47.776 60.000 79.500 -/+
VESA, 1280 X 768 60.289 74.893 102.250 -/+
VESA, 1280 X 800 49.702 59.810 83.500 -/+
VESA, 1280 X 960 60.000 60.000 108.000 +/+
VESA, 1280 X 1024 79.976 75.025 135.000 +/+
VESA, 1680 X 1050 64.674 59.883 119.000 +/-
Horizontal Frequency
The time to scan one line connecting the right edge
to the left edge of the screen horizontally is called the
Horizontal Cycle and the inverse number of the Hor-
izontal Cycle is called the Horizontal Frequency.
Unit: kHz
Vertical Frequency
Like a fluorescent lamp, the screen has to repeat the
same image many times per second to display an
image to the user. The frequency of this repetition is
called the Vertical Frequency or Refresh Rate. Unit:
Hz
Specifications