Thinklogical Velocityrgb System-9, 10 and 12 Manual User Manual
Page 13
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