Compaq CRT Monitor s7500 Service Guide - Page 9

Timing Chart

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HP S7500/MV7500/CV7500 2-3 Timing Chart This section describes thetimings that the computer industry recognizesas standard for computer-generated videosignals. Table 2-2. Timing Chart Mode 1 2 3 4 5 6 7 8 9 H. Dots 640 720 640 640 800 800 1024 1024 1280 V. Dots 480 400 480 480 600 600 768 768 1024 H-freq (kHz) 31.47 31.47 37.5 43.27 46.8 53.67 60.02 68.68 63.98 Sync Polarity - - - - + + + + + A period us 31.78 31.78 26.666 23.11 21.333 18.63 16.66 14.56 15.63 B Blanking us 6.356 6.356 6.349 5.33 5.172 4.409 3.657 3.725 3.778 C Sync us 3.81 3.81 2.032 1.556 1.616 1.138 1.219 1.016 1.037 D B.P. us 1.907 1.907 3.81 2.22 3.232 2.702 2.235 2.201 2.296 E Active us 25.42 25.42 20.37 17.78 16.162 14.22 13 10.836 11.852 F F.P. us V-freq (Hz) Sync Polarity O Period ms P Blanking ms Q Sync ms R B.P. us S Active us T F.P. us 0.636 59.95 16.68 1.43 0.064 1.02 15.25 0.35 0.636 70.08 + 14.27 1.557 0.064 1.08 12.71 0.413 0.51 75 13.3 0.533 0.08 0.427 12.8 0.027 1.556 85 - 11.76 0.67 0.069 0.578 11.09 0.023 0.323 75 + 13.333 0.533 0.064 0.448 12.8 0.021 0.569 85 + 11.76 0.578 0.056 0.503 11.18 0.019 0.203 75.03 + 13.33 0.533 0.05 0.466 12.8 0.017 Horizontal E Video Seperate Sync Vertical B K Video H D F Sync C A J L Sync I G 0.508 0.444 85 60.02 + + 11.77 16.661 0.582 0.656 0.044 0.047 0.524 0.594 11.18 16.005 0.015 0.016 H.Parameters: A: Period C: SyncWidth E: Active Time B: BlankingTime D: Back Porch F: FrontPorch V.Parameters: G: Period I: SyncWidth K: Active Time H: BlankingTime J: Back Porch L: FrontPorch Page 7

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Page 7
HP S7500/MV7500/CV7500
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
H.Parameters:
A: Period
B: BlankingTime
C:
Sync Width
D:
Back Porch
E:
Active Time
F:
Front Porch
V.Parameters:
G: Period
H: BlankingTime
I:
Sync Width
J:
Back Porch
K:
Active Time
L:
Front Porch
Seperate Sync
Horizontal
Video
C
D
E
Sync
A
B
F
Vertical
Video
I
J
Sync
G
H
L
K
Mode
1
2
3
4
5
6
7
8
9
H. Dots
640
720
640
640
800
800
1024
1024
1280
V. Dots
480
400
480
480
600
600
768
768
1024
H-freq (kHz)
31.47
31.47
37.5
43.27
46.8
53.67
60.02
68.68
63.98
Sync Polarity
-
-
-
-
+
+
+
+
+
A period us
31.78
31.78
26.666
23.11
21.333
18.63
16.66
14.56
15.63
B Blanking us
6.356
6.356
6.349
5.33
5.172
4.409
3.657
3.725
3.778
C Sync us
3.81
3.81
2.032
1.556
1.616
1.138
1.219
1.016
1.037
D B.P. us
1.907
1.907
3.81
2.22
3.232
2.702
2.235
2.201
2.296
E Active us
25.42
25.42
20.37
17.78
16.162
14.22
13
10.836
11.852
F F.P. us
0.636
0.636
0.51
1.556
0.323
0.569
0.203
0.508
0.444
V-freq (Hz)
59.95
70.08
75
85
75
85
75.03
85
60.02
Sync Polarity
-
+
-
-
+
+
+
+
+
O Period ms
16.68
14.27
13.3
11.76
13.333
11.76
13.33
11.77
16.661
P Blanking ms
1.43
1.557
0.533
0.67
0.533
0.578
0.533
0.582
0.656
Q Sync ms
0.064
0.064
0.08
0.069
0.064
0.056
0.05
0.044
0.047
R B.P. us
1.02
1.08
0.427
0.578
0.448
0.503
0.466
0.524
0.594
S Active us
15.25
12.71
12.8
11.09
12.8
11.18
12.8
11.18
16.005
T F.P. us
0.35
0.413
0.027
0.023
0.021
0.019
0.017
0.015
0.016