Thinklogical Velocityrgb System-9, 10 and 12 Manual Uživatelský manuál Strana 13

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Revision D 8 December 2012
local administrator to view the video output at the TX unit.
The analog VGA inputs are converted to a fiber optic suitable form and transmitted to the RX unit.
Modifying the Analog RGB Video Parameters
It is possible for one resolution to have different video timings, which could cause a less than perfect
display on the remote side. For example, take 1280x1024x60 Hz. The VESA standard has 1688 pixels
in one line, whereas a SGI format has 1680 pixels. The transmitter lookup table is configured for the
VESA standard, but can be easily modified to support the SGI format. (Refer to Section 7.2.6 for step by
step
instructions.)
FIGURE 14 FIGURE 15
FIGURE 14: 1280x1024x60 on an SGI computer with the PLLDIV set at 1688 (default value). Notice
the columns.
FIGURE 15: 1280x1024x60 on an SGI computer with the PLLDIV modified to 1680.
The below table lists supported analog (VGA) resolutions:
Thinklogical™ Veloctiy supported resolutions
Active Resolution
Total
Lines
Vertical
Freq(Hz)
Horizontal
Freq(kHz)
Pixel Clock
Freq(MHz)
Video Standard
Pixels Lines
640 448 472 66 31.2 25 Honeywell
640 480 525 60 31.5 25.175 Industry Standard
640 480 520 72 37.9 31.5 VESA
640 480 500 75 37.5 31.5 VESA
640 480 509 85 43.3 36 VESA
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