Timing Chart - Samsung 551V Service Manual

2 Product Specifications

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
Timing
fH (kHz)
A µsec
B µsec
C µsec
D µsec
E µsec
fV (Hz)
O msec
P msec
Q msec
R msec
S msec
Clock
Frequency
(MHz)
Polarity
H.Sync
V.Sync
Remark
Separate Sync
Horizontal
Video
Video
C C D D E E
Sync Sync Sync
B
B
A
A
A : Line time total
C : Back porch
E : Front porch
AN15V*
Table 2-1 Timing Chart
IBM
VGA3/60 Hz VGA2/70 Hz
640 x 480 720 x 400
31.469 31.469
31.778 31.778
3.813 3.813
1.907 1.907
25.422 25.422
0.636 0.636
59.940 70.087
16.683 14.268
0.064 0.064
1.048 1.080
15.253 12.711
0.318 0.413
25.175 28.322
Negative Negative
Negative Positive
Separate Separate
Vertical
Video Video
Q Q R R S S
Sync Sync Sync
P P
P
O O
O
B : Horizontal sync width
D : Active time
VESA
640/85 Hz
640/75 Hz
640 x 480 640 x 480
43.269
37.500
26.667 23.111
1.556
2.032
2.222
3.810
17.778
20.317
1.556
0.508
85.008
75.000
13.333 11.764
0.671
0.080
0.578
0.427
11.093
12.800
0.023
0.027
36.000
31.500
Negative
Negative
Negative
Negative
Separate
Separate
O : Frame time total
Q : Back porch
S : Front porch
CONFIDENTIAL
800/85 Hz
800 x 600
53.674
18.631
1.138
2.702
14.222
0.569
85.061
11.756
0.056
0.503
11.179
0.019
56.250
Positive
Positive
Separate
P : Vertical sync width
R : Active time
2-3