Timing Chart - Samsung 732N Service Manual

14 Reference Infomation

14-3 Timing Chart

This section of the service manual describes the timing that the computer industry recognizes as standard for computer-
generated video signals.
IBM
Mode
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
Video
C D E
Sync
B
A
A : Line time total
P : Vertical sync width
C : Back porch
R : Active time
14-4
Table 14-1 Timing Chart
VGA3/
640/75 Hz
60 Hz
640x480
640 x 480
31.469 37.500
31.778 26.667
3.813 2.032
1.589 3.810
26.058 20.317
0.318 0.508
59.940 75.000
16.683 13.333
0.064 0.080
0.794 0.427
15.761 12.800
0.064 0.027
26.175 31.500
Negative Negative
Negative Negative
Separate Separate
Video
Q R
Sync
P
O
B : Horizontal sync width
D : Active time
VESA
800/60 Hz 800/75 Hz 1024/60 Hz
800x600 800x600 1024x768
37.879 46.875 48.363
26.400 21.333 20.677
3.200 1.616 2.092
2.200 3.232 2.462
20.000 16.162 15.754
0.000 0.323 0.369
60.317 75.000 60.004
16.579 13.333 16.666
0.106 0.064 0.124
0.607 0.448 0.600
15.840 12.800 15.880
0.0261 0.021 0.062
40.000 49.500 75.000
Positive Positive Negative
Positive Positive Negative
Separate Separate Separate
S
O : Frame time total
Q : Back porch
1024/75 Hz 1280/60 Hz
1024x768 1280x1024
60.023 63.981
16.660 11.852
1.219 1.037
2.235 2.296
13.003 9.259
0.203 0.000
75.029 60.020
13.328 16.005
0.050 0.047
0.466 0.594
12.795 15.630
0.017 0.016
78.750 108.000
Positive Positive
Positive Positive
Separate Separate
H/V Composite Sync
Sync-on-Green
1280/75 Hz
1280x1024
79.975
12.504
1.067
1.837
9.481
0.119
75.025
13.329
0.038
0.475
12.804
0.013
135.000
Positive
Positive
Separate