Timing Chart - Samsung LTM295W 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
DTV/
DTV/
59.94 Hz 59.94 Hz
Timing 1280 x 720 1920 x 1080
fH (kHz) 44.955 33.716
A µsec 1650 2200
B µsec 40 44
C µsec 70 44
D µsec 1280 1920
E µsec 260 192
fV (Hz) 59.94 59.94
O msec 750 1125
P msec 5 15
Q msec 20 2
R msec 720 1080
S msec 5 5
Clock
Freq. 74.176 74.176
(MHz)
Polarity
H.Sync –/+ –/+
V.Sync –/+ –/+
Remark Separate Separate
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
LTM295W/LTM405W
Table 2-1 Timing Chart
VGA3/60 Hz VGA/72 Hz VGA/75 Hz
640 x 480 640 x 480 640 x 480
31.5 37.9 37.5
800 832 840
96 40 64
40 120 120
640 640 640
8 16 16
60.0 72.8 75.0
525 520 500
2 3 3
25 20 16
480 480 480
2 1 1
25.175 31.500 31.500
Negative Negative Negative
Negative Negative Negative
Separate 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
VGA/85 Hz MAC/60 Hz MAC/66 Hz
640 x 480 640 x 480 640 x 480
43.3 31.5 35.0
832 800 864
56 96 64
80 48 96
640 640 640
56 16 64
85.0 60.0 66.7
509 525 525
3 2 3
25 33 39
480 480 480
1 10 3
36.000 25.175 30.240
Negative Negative Negative
Negative Negative Negative
Separate Separate Separate
O : Frame time total
Q : Back porch
S : Front porch
CONFIDENTIAL
SVGA/56 Hz SVGA/60 Hz SVGA/72 Hz
800 x 600 800 x 600 800 x 600
35.2 37.9 48.1
1024 1056 1040
72 128 120
128 88 64
800 800 800
24 40 56
56.3 60.3 72.2
625 628 666
2 4 6
22 23 23
600 600 600
1 1 37
36.000 40.000 50.000
–/+ Positive Positive
–/+ Positive Positive
Separate Separate Separate
P : Vertical sync width
R : Active time
2-3