Service manual

Product Specifications
Page 7
MD 1998LE (B1997PNST)
2-3 Timing Chart
This section describes the timings that the computer industry recognizes as standard for computer-generated
video signals.
Table 2-2. Timing Chart
Seperate Sync
Horizontal
Video
C
D
E
Sync
A
B
F
Vertical
Video
I
J
Sync
G
H
L
K
H.Parameters:
A: Period B: Blanking Time
C: Sync Width D: Back Porch
E: Active Time F: Front Porch
V.Parameters:
G: Period H: Blanking Time
I: Sync Width J: Back Porch
K: Active Time L: Front Porch
Mode 12345678910111213
H. Dots
640 720 640 800 1152 800 1024 1024 1280 1280 1024 1600 1280
V. Do t s
480 400 480 600 864 600 768 768 1024 1024 768 1200 960
H-freq (kHz)
31.47 37.93 43.27 46.8 67.5 53.67 60.03 68.67 80 91.146 80 93.75 85.938
Sync
Polarity
---++++++++++
A period us
31.78 26.366 23.11 21.33 14.815 18.631 16.66 14.561 12.504 10.971 12.376 10.667 11.636
B Blking us
6.356 6.085 5.33 5.172 4.148 4.409 3.657 3.725 3.022 2.844 3.624 2.765 3.017
C Sync us
3.81 2.028 1.556 1.616 1.185 1.138 1.219 1.016 1.067 1.016 1.231 0.948 1.077
D B.P. us
1.907 3.042 2.22 3.232 2.37 2.702 2.235 2.201 1.837 1.422 2.12 1.501 1.508
E Active us
25.42 20.282 17.78 16.16 10.667 14.222 13 10.836 9.481 8.127 8.752 7.901 8.62
F F.P. us
0.636 1.014 1.556 0.323 0.593 0.569 0.203 0.508 0.119 0.406 0.273 0.316 0.431
V-freq (Hz)
59.94 85.04 85 75 75 85 75.03 84.99 75 85 100 75 85
Sync
Polarity
-+-++++++++++
O Period ms
16.68 11.759 11.76 13.33 13.333 11.756 13.33 11.765 13.329 11.761 9.988 13.333 11.764
P Blking ms
1.43 1.213 0.67 0.533 0.533 0.578 0.533 0.582 0.525 0.527 0.483 0.533 0.593
Q Sync ms
0.064 0.079 0.069 0.064 0.044 0.056 0.05 0.044 0.038 0.033 0.074 0.032 0.035
R B.P. us
1.02 1.107 0.578 0.448 0.474 0.503 0.466 0.524 0.475 0.483 0.397 0.491 0.547
S Active us
15.25 10.546 11.09 12.8 12.8 11.179 12.8 11.183 12.804 11.235 9.505 12.8 11.171
T F.P. us
0.35 0.026 0.023 0.021 0.015 0.019 0.017 0.015 0.013 0.011 0.013 0.011 0.012