Specifications

Display Mode

Horizontal

Vertical Fre-

Pixel Clock

Sync Polarity

 

Frequency

quency (Hz)

(MHz)

(H/V)

 

(kHz)

 

 

 

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

-/-

 

 

 

 

 

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, 1360 x 768

47.712

60.015

85.500

+/+

 

 

 

 

 

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 Horizontal 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

50