Timing Chart - Samsung ES17N series Service Manual

2 Product Specifications

2-3 Timing Chart

This section of the service manual describes the timing that the computer industry recognizes as standard
for computer-generated video signals.
Mode
IBM
VGA2/ VGA3/
70 Hz 60 Hz
Timing 720 x 400 640 x 480
fH (kHz) 31.469 31.469
A µsec 31.777 31.778
B µsec 3.813 3.813
C µsec 1.589 1.589
D µsec 26.058 26.058
E µsec 0.318 0.318
fV (Hz) 70.087 59.940
O msec 14.268 16.683
P msec 0.064 0.064
Q msec 0.858 0.794
R msec 13.155 15.761
S msec 0.191 0.064
Clock
Freq. 28.322 25.175
(MHz)
Polarity
H.Sync Negative Negative
V.Sync Positive Negative
Remark Separate Separate
Separate Sync
Horizontal
Video
Video
C D E
C D E
Sync Sync
Sync
B
B
A
A
A : Line time total
C : Back porch
E : Front porch
ES15N*/ES17N*
Table 2-1. Timing Chart
640/75 Hz 640/85 Hz 800/75 Hz
640 x 480 640 x 480 800 x 600
37.500 43.269 46.875
26.667 23.111 21.333
2.032 1.556 1.616
3.810 2.222 3.232
20.317 17.778 16.162
0.508 1.556 0.323
75.000 85.008 75.000
13.333 11.764 13.333
0.080 0.671 0.064
0.427 0.578 0.448
12.800 11.093 12.800
0.027 0.023 0.021
31.500 49.500 49.500
Negative Negative Positive
Negative Negative Positive
Separate Separate Separate
Vertical
Video Video
Q Q R R S S
Sync Sync
Sync
P P
P
O O
O
B : Horizontal sync width
D : Active time
VESA
800/85 Hz 1024/60Hz 1024/75Hz
800 x 600 1024 x 768 1024 x 768
53.674 48.363 60.023
18.631 20.677 16.660
1.138 2.092 1.219
2.702 2.462 2.235
14.222 15.754 13.003
0.569 0.369 0.203
85.061 60.004 75.029
11.756 16.666 13.328
0.056 0.124 0.050
0.503 0.600 0.466
11.179 15.880 12.795
0.019 0.062 0.017
56.250 75.000 78.750
Positive Negative Positive
Positive Negative Positive
Separate Separate Separate
H/V Composite Sync
A
Horizontal Vertical
P
B
Sync-on-Green
Vertical
Green
Horizontal
P
B
O : Frame time total
Q : Back porch
S : Front porch
CONFIDENTIAL
1024/85Hz 1280/76Hz 1280/75Hz
1024x768 1280x1024 1280x1024
(17" Only) (17" Only)
68.677 81.129 79.976
14.561 16.640 12.504
1.016 6.400 1.067
2.201 2.880 1.837
10.836 9.481
0.508 3.200 0.119
84.997 76.106 75.025
11.765 10.660 13.329
0.044 0.080 0.038
0.524 3.200 0.475
11.183 12.804
0.015 0.020 0.013
94.500 135.000 135.000
Positive Negative Positive
Positive Negative Positive
Separate Com. Separate
VIDEO
Q S
R
O
Q R S
O
P : Vertical sync width
R : Active time
2-3