Samsung LS20TWASV/CI, LS19TWUSU/CI manual Cycle and the inverse number of the Horizontal Cycle is

Specifications

Display Mode	Horizontal	Vertical Fre-	Pixel Clock	Sync Polarity
	Frequency	quency (Hz)	(MHz)	(H/V)
	(kHz)
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 960	60.000	60.000	108.000	+/+
VESA, 1280 X 1024	79.976	75.025	135.000	+/+
VESA, 1680 X 1050	64.674	59.883	119.000	+/-

		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
General
	General
	Model Name	SyncMaster T200GN
	LCD Panel
	Size	20 inch (51 cm)
	Display area	433.44 mm (H) x 270.9 mm (V)
	Pixel Pitch	0.258 mm (H) x 0.258 mm (V)
	Synchronization
	Horizontal	30 ~ 81 kHz
	Vertical	56 ~ 75 Hz
	Display Color
	16.7M
	Resolution
	Optimum resolution	1680 x 1050 @ 60 Hz
	Maximum resolution	1680 x 1050 @ 60 Hz

Input Signal, Terminated

RGB Analog

0.7 Vp-p ± 5 %

Separate H/V sync, Composite, SOG

TTL level (V high ≥ 2.0 V, V low ≤ 0.8 V)

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