Timing Chart; Sync-On-Green - Samsung 711MP Service Manual

14-4 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
720 x 400 640 x 480
Timing
fH (kHz) 31.469
A μsec 31.778
B μsec 3.813
C μsec 1.589
D μsec 26.058
E μsec 0.318
fV (Hz) 59.940
O msec 16.683
P msec 0.064
Q msec 0.794
R msec 15.761
S msec 0.064
Clock
Freq. 25.175
(MHz)
Polarity
H.Sync Negative
V.Sync Negative
Remark Separate
Separate Sync
Video
C D E
Sync
B
A
A : Line time total
C : Back porch
E : Front porch
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
17.778 16.162
20.317
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
Video
Q R S
Sync
P
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

Sync-on-Green

O : Frame time total
Q : Back porch
S : Front porch
14 Reference Infomation
1024/85Hz 1280/76Hz 1280/75Hz
1024x768 1280x1024 1280x1024
(Analog Only) (Analog 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
P : Vertical sync width
R : Active time
14-9