Timing Chart - Samsung DP14LS 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
720/70 Hz
720 x 400
Timing
fH (kHz) 31.469
A µsec 31.777
B µsec 3.813
C µsec 1.907
D µsec 25.422
E µsec 0.636
fV (Hz) 70.087
O msec 14.268
P msec 0.064
Q msec 1.080
R msec 12.711
S msec 0.413
Clock
Frequency 28.322
(MHz)
Polarity
H.Sync Negative
V.Sync Positive
Remark 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
DP14L*/DP15L*
640/60 Hz 640/75 Hz
640 x 480 640 x 480
31.469 37.500
31.778 26.667
3.813 2.032
1.907 3.810
25.422 20.317
0.636 0.508
59.940 75.000
16.683 13.333
0.064 0.080
1.048 0.427
15.253 12.800
0.318 0.027
25.175 31.500
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
640/85 Hz 800/75 Hz
640 x 480 800 x 600
43.269 46.875
23.111 21.333
1.556 1.616
2.222 3.232
17.778 16.162
1.556 0.323
85.008 75.000
11.764 13.333
0.069 0.064
0.578 0.448
11.093 12.800
0.023 0.021
36.000 49.500
Negative Positive
Negative Positive
Separate Separate
A
Horizontal
B
S
S
O : Frame time total
Q : Back porch
S : Front porch
2 Product Specifications
VESA
1024/60 Hz
800/85 Hz
1024 x 768
800 x 600
(14")
53.674 48.363
18.631 20.677
1.138 2.092
2.702 2.462
14.222 15.754
0.569 0.369
85.061 60.004
11.756 16.666
0.056 0.124
0.503 0.600
11.179 15.880
0.019 0.062
56.250 65.000
Positive Negative
Positive Negative
Separate Separate
H/V Composite Sync
VIDEO
Q
R
Vertical
P
O
P : Vertical sync width
R : Active time
1024/75 Hz
1024 x 768
(15")
60.023
16.660
13.003
3.658
13.206
3.454
75.029
13.328
12.795
0.533
12.812
0.516
78.750
Positive
Positive
Separate
S
2-3