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4. Seamless Switching or Dissolving with the MGVC 1280
IMPORTANT !!!
The output resolution of MGVC 1280 must be adjusted first to the graphic resolution applied
on input 8. If this is not performed the dissolve function will not work.
As no downscaling is supported the selected output resolution must equal or exceed the
graphic input resolution applied at input 6 or 7.
After applying a new graphic source to inputs 6 or 7 it is necessary to STORE the new recognized
input resolution. Without storing, seamless switching is not perfect.
The
MGVC 1280
supports synchronous switching or dissolving between video inputs (1-7) and the
source applied on input 8.
Dissolving between inputs 1-7 is performed over black in a way that the active image is faded to
black and the new selected source is being faded in from black.
Possible Configurations:
Format
PAL 50 Hz
PAL 75 Hz
PAL 100 Hz
NTSC 60 Hz
800 x 600
X
X
X
X
1024 x 768
X
X
X
X
1280 x 1024
X
X
NO
X
Most computer graphic cards do not allow the selection of 50 Hz as a refresh rate, although this
would be the optimum setting for PAL. In this case we recommend the selection of 75 Hz which is a
VESA standard and should be available with any standard VGA graphics adaptor.
You may find a very useful software package
POWER STRIP
from ENTECH
www.entechtaiwan.com
that allows elaborated manipulation of the graphic card timings.
4.1
Adjustments for Inputs 6 and 7 for the MGVC 1280
The MGVC 1280 offers the scaling of inputs 6 and 7 to the desired output format and frame rate.
The selected ouput resolution in the OUTPUT GROUP menu must have the same value of the
input signal applied at input 8 or any of the available options in the free run mode.
As no downscaling is supported the selected output resolution must equal or exceed the input
resolution applied at input 6 or 7.
The MGVC 1280 is also compatible with american HDTV signals which are usually in a progressive
YPrPb-format in 480p, 575p, 720p or 1080i on its input 6. The MGVC 1280 will convert the YPrPb
or RGBHV signals in a RGBHV format which may be outputted in higher resolution and different
frame rate. The MGVC 1280 is also compatible for future RGB signals in a progressive format.
INPUT 6 also handles RGsB with Sync on Green. Inputs 6 will also accept HDTV 1080i, 720p and
480p in RGBHV format for conversion into XGA and SXGA .
