ViewSonic VP2030b-1 Service Manual page 9

ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency
Vertical Refresh Rate
Maximum Pixel Clock
Sync Polarity
Timing Table
Item Timing
@ 70 Hz, 31.5 KHz ü
1 640 x 350
@ 85 Hz, 37.9 KHz ü
2 640 x 350
@ 60 Hz, 31.5 KHz ü
3 640 x 400
@ 70 Hz, 31.5 KHz ü
4 640 x 400
@ 85 Hz, 37.9 KHz ü
5 640 x 400
@ 50 Hz, 24.7 KHz ü
6 640 x 480
@ 60 Hz, 31.5 KHz ü
7 640 x 480
8 640 x 480 @ 67 Hz,
@ 72 Hz, 37.9 KHz ü
9 640 x 480
@ 75 Hz, 37.5 KHz ü
10 640 x 480
@ 85 Hz, 43.3 KHz ü
11 640 x 480
@ 70 Hz, 31.5 KHz ü
12 720 x 400
@ 85 Hz, 37.9 KHz ü
13 720 x 400
Viewsonic Corporation
24 – 92 KHZ
50 – 85* HZ.
165 MHz
Independent of sync polarity.
Analog
ü ü
ü
ü ü
ü ü
ü ü
ü ü
ü ü
KHz ü ü ü
35
ü ü
ü ü
ü ü
ü ü
ü ü
6
Remark
ü
For Separated sync, Only horizontal full
ü
screen, The vertical position is at the
center.
For SOG sync, switch 640x400@60Hz
ü
and 640x480@60Hz by [1]+[2] short cut
key (primary = 640x480@60Hz)
For Separated Sync, Switch
640x400@70Hz and 720x400@70Hz by
ü
[1]+[2] short cut key (primary =
640x400@70Hz)
For Separated Sync, Switch
640x400@85Hz and 720x400@85Hz by
ü
[1]+[2] short cut key (primary =
640x400@85Hz)
For SOG sync, switch 640x400@60Hz
ü
and 640x480@60Hz by [1]+[2] short cut
key (primary = 640x480@60Hz)
ü
ü
ü
ü
ü
For Separated Sync, Switch
ü
640x400@85Hz and 720x400@85Hz by
[1]+[2] short cut key (primary =
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