User’s Manual
36
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 adjust the screen as follows.
Display Mode
Horizontal Frequency Vertical Frequency Pixel Clock Sync Polarity
(kHz) (Hz) (MHz) (H/V)
IBM, 640 x 480 31.469 59.940 25.175 -/-
IBM, 720 x 400 31.469 70.087 28.322 -/+
VESA, 640 X 480 43.269 85.008 36.000 -/-
VESA, 800 X 600 46.875 75.000 49.500 +/+
VESA, 800 X 600 53.674 85.061 56.250 +/+
VESA, 1024 X 768 60.023 75.029 78.750 +/+
VESA, 1024 X 768 68.677 84.997 94.500 +/+
VESA, 1280 X 1024 79.976 75.025 135.00 +/+
Horizontal Frequency
The time to scan one line connecting the right edge to the left edge of the screen
horizontally is called Horizontal Cycle and the inverse number of the Horizontal Cycle is
called 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 Vertical Frequency
or Refresh Rate.
Unit: Hz
Specifications
Display Mode
Horizontal Frequency Vertical Frequency Pixel Clock Sync Polarity
(kHz) (Hz) (MHz) (H/V)
IBM, 640 x 480 31.469 59.940 25.175 -/-
IBM, 720 x 400 31.469 70.087 28.322 -/+
VESA, 640 X 480 37.500 75.000 31.500 -/-
VESA, 640 X 480 43.269 85.008 36.000 -/-
VESA, 800 X 600 46.875 75.000 49.500 +/+
VESA, 800 X 600 53.674 85.061 56.250 +/+
VESA, 1024 X 768 60.023 75.029 78.750 +/+
VESA, 1024 X 768 68.677 84.997 94.500 +/+
Model Name : SAMTRON 76BDF
Model Name : SAMTRON 76DF/ 78DF
Preset Timing Modes
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