Samsung ES15U, LTM1555(B) specifications Timing Chart, IBM Vesa

2 Product Specifications

2-3 Timing Chart

CONFIDENTIAL

This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals.

Table 2-1 Timing Chart

Mode	IBM						VESA
	VGA2/	VGA3/	640/75 Hz	640/85 Hz	800/75 Hz	800/85 Hz	1024/60Hz	1024/75Hz	1024/85Hz	1280/76Hz	1280/75Hz
	70 Hz	60 Hz
			640 x 480	640 x 480	800 x 600	800 x 600	1024 x 768	1024 x 768	1024x768	1280x1024	1280x1024
Timing	720 x 400	640 x 480
										(17” Only)	(17” Only)
fH (KHz)	31.469	31.469	37.500	43.269	46.875	53.674	48.363	60.023	68.677	81.129	79.976
A µsec	31.777	31.778	26.667	23.111	21.333	18.631	20.677	16.660	14.561	16.640	12.504
B µsec	3.813	3.813	2.032	1.556	1.616	1.138	2.092	1.219	1.016	6.400	1.067
C µsec	1.589	1.589	3.810	2.222	3.232	2.702	2.462	2.235	2.201	2.880	1.837
D µsec	26.058	26.058	20.317	17.778	16.162	14.222	15.754	13.003	10.836		9.481
E µsec	0.318	0.318	0.508	1.556	0.323	0.569	0.369	0.203	0.508	3.200	0.119
fV (Hz)	70.087	59.940	75.000	85.008	75.000	85.061	60.004	75.029	84.997	76.106	75.025
O msec	14.268	16.683	13.333	11.764	13.333	11.756	16.666	13.328	11.765	10.660	13.329
P msec	0.064	0.064	0.080	0.671	0.064	0.056	0.124	0.050	0.044	0.080	0.038
Q msec	0.858	0.794	0.427	0.578	0.448	0.503	0.600	0.466	0.524	3.200	0.475
R msec	13.155	15.761	12.800	11.093	12.800	11.179	15.880	12.795	11.183		12.804
S msec	0.191	0.064	0.027	0.023	0.021	0.019	0.062	0.017	0.015	0.020	0.013
Clock
Freq.	28.322	25.175	31.500	49.500	49.500	56.250	75.000	78.750	94.500	135.000	135.000
(MHz)
Polarity
H.Sync	Negative	Negative	Negative	Negative	Positive	Positive	Negative	Positive	Positive	Negative	Positive
V.Sync	Positive	Negative	Negative	Negative	Positive	Positive	Negative	Positive	Positive	Negative	Positive
Remark	Separate	Separate	Separate	Separate	Separate	Separate	Separate	Separate	Separate	Com.	Separate

		Separate Sync
Horizontal			Vertical
Video			Video
C C	D D	E E	Q Q	R R	S S
Sync			Sync
	B			PP
	B
	A A			O O

	H/V Composite Sync
		VIDEO
A	Q	R	S
Horizontal	Vertical
	P	O
B

	Sync-on-Green
Vertical
Green
Horizontal
P	Q	R	S
B	O

A : Line time total	B : Horizontal sync width	O : Frame time total	P : Vertical sync width
C : Back porch	D : Active time	Q : Back porch	R : Active time
E : Front porch		S : Front porch

LTM1555(B)/LTM1755(B) 2-3