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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 adjust the screen as follows.
Table 1. Preset Timing Modes
Display Mode
MAC, 640 x 480
MAC, 832 x 624
MAC, 1152 x 870
IBM, 640 x 350
IBM, 640 x 480
IBM, 720 x 400
VESA, 640 x 480
VESA, 640 x 480
VESA, 800 x 600
VESA, 800 x 600
VESA, 800 x 600
VESA, 800 x 600
VESA, 1024 x 768
VESA, 1024 x 768
VESA, 1024 x 768
VESA, 1280 x 1024
VESA, 1152 x 864
VESA, 1280 x 1024
Table 2. NTSC Broadcasting Systems
Color System
NTSC
Vertical Frequency
Horizontal Frequency
(kHz)
35.000
49.726
68.681
31.469
31.469
31.469
37.500
37.861
35.156
37.879
46.875
48.077
48.363
56.476
60.023
63.981
67.500
79.976
Sound System
Stereo System
M
BTSC (SAP)
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
Pixel Clock
(MHz)
(Hz)
66.667
30.240
74.551
57.284
75.062
100.000
70.086
25.175
59.940
25.175
70.087
28.322
75.000
31.500
72.809
31.500
56.250
36.000
60.317
40.000
75.000
49.500
72.188
50.000
60.004
65.000
70.069
75.000
75.029
78.750
60.020
108.000
75.000
108.000
75.025
135.000
Channel System
A2
US
US
EIAJ
Japan
Sync Polarity
(H/V)
-/-
-/-
-/-
+/-
-/-
-/+
-/-
-/-
+,-/+,-
+/+
+/+
+/+
-/-
-/-
+/+
+/+
+/+
+/+
Countries
Korea
USA, Canada,
Chile, Venezuela,
Cuba, Colombia,
Jamaica, Mexico,
Panama, Peru,
Philippines, Puerto-
Rico, Taiwan
Japan
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