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4.3
Connecting a graphic source to the MGVC 1280
1.
For seamless operation you must first connect the graphic source or genlock signal
(RGBHV format) at input 8.
2.
Then adjust the output resolution of the MGVC 1280 while any of INPUT 1-5 is active to
the resolution of the applied genlock signal at input 8. Possible settinges are SVGA, XGA
and SXGA at 50,60 or 75/100Hz.
3.
Additional graphic sources may be connected at input 6 or 7. The highest possible
resolution for seamless switching or dissolving is 1024 x 768@75 Hz.
4.
First select the desired input 6 or 7. Then go to the menu INPUT GROUP and select the
appropriate input resolution format of the offered VESA Standards in the sub-menu
STANDARD SELECT or leave it an automatic detection (AUTO mode). For older PCs it
may be required to select the VESA standard manually. If you have an image with
irregularities(banding) going fromt top to the bottom of the image you must manually adjust
the pixelclock of the MGVC 1280. Go to the menu CLOCKS PER LINE and try to adjust
the image with UP/DOWN buttons. Further adjustment are possible in the PHASE sub-
menu. It may be required to approximate the perfect adjustment toggling between PHASE
and CLOCKS PER LINE. PHASE determines the position where the sample of the input
signal is located. It is a trial and error procedure and best performed with a special test
signal where repetitively one pixel is black and the adjacent white.
PHASE
00.00
°
5.
After applying a new source to inputs 6-8 it is necessary to STORE the new recognized
output resolut ion. Without storing, seamless switching is not possible.
ATTENTION !!!!!
The MGVC 1280 cannot downconvert any input signals. The image quality of downconverted
computer images is unacceptable whereas upconversion is almost lossless. That requires that the
output resolution has to be selected higher or equal to the graphic input source at input 6 or 7.
