Timing Chart - Samsung SYNCM.400B 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
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 E
C D E
Sync
Sync Sync
B
B
A
A
A : Line time total
C : Back porch
E : Front porch
CKA42*7L/5227L
Table 2-1. Timing Chart
IBM
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
Q R
Q R
Sync
Sync Sync
P P P
O O
O
B : Horizontal sync width
D : Active time
640/85 Hz 800/75 Hz
640 x 480 800 x 600
43.269
23.111
1.556
2.222
17.778
1.556
85.008
11.764
0.069
0.578
11.093
0.023
36.000
Negative
Negative
Separate
A
Horizontal
B
S
S
O : Frame time total
Q : Back porch
S : Front porch
2 Product Specifications
VESA
800/85 Hz
800 x 600
46.875 53.674
21.333 18.631
1.616 1.138
3.232 2.702
16.162 14.222
0.323 0.569
75.000 85.061
13.333 11.756
0.064 0.056
0.448 0.503
12.800 11.179
0.021 0.019
49.500 56.250
Positive Positive
Positive Positive
Separate Separate
H/V Composite Sync
VIDEO
Q
R
Vertical
P
O
P : Vertical sync width
R : Active time
1024/60 Hz
1024 x 768
48.363
20.677
2.092
2.462
15.754
0.369
60.004
16.666
0.124
0.600
15.880
0.062
65.000
Negative
Negative
Separate
S
2-3