Preset Timing Modes, Horizontal Frequency

SyncMaster 173T/193T/170N/171N/172N/173N/191N/192N/193N/191T plus/174T

General PowerSaver

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
	Horizontal	Vertical	Pixel Clock	Sync Polarity
Display Mode	Frequency	Frequency	Pixel Clock	Sync Polarity
Display Mode	Frequency	Frequency	(MHz)	(H/V)
	(kHz)	(Hz)	(MHz)	(H/V)
	(kHz)	(Hz)

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	37,500	75,000	31,500	-/-

VESA, 640 x 480	37,861	72,809	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	46,875	75,000	49,500	+/+

VESA, 800 x 600	48,077	72,188	50,000	+/+

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, 1280 x 1024	63,981	60,020	108,00	+/+

VESA, 1280 x 1024	79,976	75,025	135,00	+/+

SUN, 1280 x 1024	81,129	76,106	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

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Preset Timing Modes

Table 1. Preset Timing Modes

Pixel Clock

Sync Polarity

Display Mode

Frequency

(MHz)

(kHz)

Horizontal Frequency

Vertical Frequency

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