Der A1097C ist anscheinend ein Festfrequenzmonitor, wurde mit HP 710 Workstations ausgeliefert.
Er ist ausgelegt für 1208 x 1024 @ 72Hz!
Du mußt also genau diese Einstellungen beim Grafiktreiber machen!!
Ich hab diese info aus folgendem news-posing:
> Does anybody know the horizontal scan rate of an A1097C (as supplied with the 710 workstations)?
> Is the `horizontal scan' the same as the refresh rate?
No, the "refresh rate" generally refers to the vertical rate, although it is sometimes unclear for interlaced displays whether one is talking about the "field" rate or the "frame" rate. (Not to worry here; all HP workstations run non-interlaced display formats.)
The A1097C (any of the A1097 models, for that matter) is a fixed-frequency (not "multisync") monitor intended to support a display format of 1280 x 1024 at 72 Hz refresh; the horizontal rate is 78.125 kHz.
The details of this timing are listed below:
HP 1280 x 1024 72 Hz timing
Pixel clock.......................135 MHz (7.407 ns)
Horizontal sweep frequency......78.125 kHz
Horizontal period (total).......12.799 us (1728 pixels)
Horizontal active time...........9.481 us (1280 pixels)
Horizontal front porch...........0.474 us ( 64 pixels)
Horizontal sync width............1.422 us ( 192 pixels)
Horizontal back porch............1.422 us ( 192 pixels)
Horizontal blanking..............3.318 us ( 448 pixels)
Vertical sweep frequency........72.008 Hz ("Refresh rate")
Vertical period.................13.887 ms (1085 lines)
Vertical active time............13.107 ms (1024 lines)
Vertical front porch............38.39 us ( 3 lines)
Vertical sync width.............38.39 us ( 3 lines)
Vertical back porch............703.95 us ( 55 lines)
Vertical blanking................0.780 ms ( 61 lines)
All video signals conform to RS-343A levels (as listed below), and expect
75 ohms termination.
RS-343A Signal Levels
White.........0.714V above blank
Black.........0.054V above blank
Blank.........REFERENCE (AC coupled system)
Sync Tip......0.286V below black
hope it helped...
tm
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