Timing Chart - Samsung SyncMaster 800TFT Service Manual

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
C D E
Sync Sync Sync
B
B
A
A
A : Line time total
C : Back porch
E : Front porch
SyncMaster 800TFT
640/75 Hz 640/85 Hz
640 x 480 640 x 480
37.500 43.269
26.667 23.111
2.032 1.556
3.810 2.222
20.317 17.778
0.508 1.556
75.000 85.008
13.333 11.764
0.080 0.671
0.427 0.578
12.800 11.093
0.027 0.023
31.500 49.500
Negative Negative
Negative Negative
Separate Separate
Vertical
Video
Video
E Q R
Q R
Sync Sync
Sync
P P P
O O
O
B : Horizontal sync width
D : Active time
Table 2-1. Timing Chart
VESA
800/75 Hz 800/85 Hz 1024/60Hz
800 x 600 800 x 600 1024 x 768
46.875 53.674 48.363
21.333 18.631 20.677
1.616 1.138 2.092
3.232 2.702 2.462
16.162 14.222 15.754
0.323 0.569 0.369
75.000 85.061 60.004
13.333 11.756 16.666
0.064 0.056 0.124
0.448 0.503 0.600
12.800 11.179 15.880
0.021 0.019 0.062
49.500 56.250 75.000
Positive Positive Negative
Positive Positive Negative
Separate Separate Separate
A
Horizontal
B
S
S
Green
Horizontal
B
O : Frame time total
Q : Back porch
S : Front porch
1024/75Hz 1024/85Hz
1024 x 768 1024x768
60.023 68.677
16.660 14.561
1.219 1.016
2.235 2.201
13.003 10.836
0.203 0.508
75.029 84.997
13.328 11.765
0.050 0.044
0.466 0.524
12.795 11.183
0.017 0.015
78.750 94.500
Positive Positive
Positive Positive
Separate Separate
H/V Composite Sync
VIDEO
Q
Vertical
P
O
Sync-on-Green
Vertical
P
Q
O
P : Vertical sync width
R : Active time
2 Product Specifications
1280/76Hz 1280/75Hz
1280x1024 1280x1024
81.129 79.976
16.640 12.504
6.400 1.067
2.880 1.837
9.481
3.200 0.119
76.106 75.025
10.660 13.329
0.080 0.038
3.200 0.475
12.804
0.020 0.013
135.000 135.000
Negative Positive
Negative Positive
Com. Separate
S
R
R
S
2-3