Timing Chart - Samsung GY15MS series 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/
70 Hz
Timing 720 x 400
fH (kHz) 31.469
A µsec 31.777
B µsec 3.813
C µsec 1.589
D µsec 26.058
E µsec 0.318
fV (Hz) 70.087
O msec 14.268
P msec 0.064
Q msec 0.858
R msec 13.155
S msec 0.191
Clock
Freq. 28.322
(MHz)
Polarity
H.Sync Negative
V.Sync Positive
Remark 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
GY15MS*/GY17MS*
Table 2-1 Timing Chart
VGA3/
640/75 Hz 800/60 Hz
60 Hz
640 x 480 800 x 600
640 x 480
31.469 37.500 37.879
31.778 26.667 26.400
3.813 2.032 3.200
1.589 3.810 2.200
26.058 20.317 20.000
0.318 0.508 0.000
59.940 75.000 60.317
16.683 13.333 16.579
0.064 0.080 0.106
0.794 0.427 0.607
15.761 12.800 15.840
0.064 0.027 0.0261
26.175 31.500 40.000
Negative Negative Positive
Negative Negative Positive
Separate Separate Separate
Vertical
Video
Video
Q R S
Q R S
Sync Sync
Sync
P P P
O O
O
B : Horizontal sync width
D : Active time
VESA
800/75 Hz 1024/60 Hz 1024/75 Hz
800 x 600 1024 x 768 1024 x 768
46.875 48.363 60.023
21.333 20.677 16.660
1.616 2.092 1.219
3.232 2.462 2.235
16.162 15.754 13.003
0.323 0.369 0.203
75.000 60.004 75.029
13.333 16.666 13.328
0.064 0.124 0.050
0.448 0.600 0.466
12.800 15.880 12.795
0.021 0.062 0.017
49.500 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
Q
B
O : Frame time total
Q : Back porch
S : Front porch
2 Product Specifications
VESA (GY17MS*)
1280/60 Hz 1280/75 Hz
1280 x 1024 1280 x 1024
63.981 79.975
11.852 12.504
1.037 1.067
2.296 1.837
9.259 9.481
0.000 0.119
60.020 75.025
16.005 13.329
0.047 0.038
0.594 0.475
15.630 12.804
0.016 0.013
108.000 135.000
Positive Positive
Positive Positive
Separate Separate
VIDEO
Q
R S
O
R S
O
P : Vertical sync width
R : Active time
2-3