3-6
Using the product
Horizontal Frequency
The time taken to scan one line from the left-most position to the right-most position on the screen is called the horizontal cycle
and the reciprocal of the horizontal cycle is called the horizontal frequency. The horizontal frequency is represented in kHz.
Vertical Frequency
A panel must display the same picture on the screen tens of times every second so that humans can see the picture. This
frequency is called the vertical frequency. The vertical frequency is represented in Hz.
DISPLAY MODE
HORIZONTAL
FREQUENCY (KHZ)
VERTICAL
FREQUENCY (HZ)
PIXEL CLOCK (MHZ)
SYNC POLARITY (H/
V)
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
31.469
59.94
25.175
-/-
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 800
49.702
59.810
83.500
-/+
VESA, 1280 x 960
60.000
60.000
108.000
+/+
VESA, 1280 x 1024
63.981
60.020
108.000
+/+
VESA, 1280 x 1024
79.976
75.025
135.000
+/+
VESA, 1440 x 900
55.935
59.887
106.500
-/+
VESA, 1440 x 900
70.635
74.984
136.750
-/+
VESA, 1600 X 1200
75.000
60.000
162.000
+/+
VESA, 1680 X 1050
65.290
59.954
146.250
-/+
VESA, 1920 X 1080
67.500
60.000
148.500
+/+
