Samsung SyncMaster 181T Owner's Manual page 42

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
General
PowerSaver
Display Mode
Preset Timing
Modes
IBM, 640 x 350
IBM, 640 x 480
IBM, 720 x 400
VESA, 640 x 480
VESA, 640 x 480
VESA, 640 x 480
MAC., 640 x 480
MAC., 832 x 624
VESA, 800 x 600
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, 1024 x 768
VESA, 1280 x 1024
VESA, 1280 x 1024
SUN, 1280 x 1024
SyncMaster 181T
Horizontal
Frequency
(kHz)
31.469
31.469
31.469
37.500
37.861
43.269
35.000
49.726
35.156
37.879
46.875
48.077
53.674
48.363
56.476
60.023
68.677
63.981
79.976
81.129
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
Vertical
Pixel Clock
Frequency
(MHz)
(Hz)
70.086 25.175
59.940 25.175
70.087 28.322
75.000 31.500
72.809 31.500
85.008 36.000
66.667 30.240
74.551 57.284
56.250 36.000
60.317 40.000
75.000 49.500
72.188 50.000
85.061 56.250
60.004 65.000
70.069 75.000
75.029 78.750
84.997 94.500
60.020 108.00
75.025 135.00
76.106 135.00
Sync Polarity
(H/V)
+/-
-/-
-/+
-/-
-/-
-/-
-/-
-/-
+,-/+,-
+/+
+/+
+/+
+/+
-/-
-/-
+/+
+/+
+/+
+/+
-/-