Tektronix Grass Valley 3000 - Manual (Page 228)

Appendix A — Shaped and Unshaped Video
A-6
Correct Input Configuration
Figure A-5 and Figure A-7 show how the switcher handles the fill
video when the input shaped/unshaped selection in the
Configuration/Inputs/Map Inputs menu is set correctly to match
the input signal that is mapped to the selected crosspoint.
Figure A-6 shows the appearance of the video on the monitor in
both of these cases.
Correct Operation With Shaped Fill Video
Figure A-5 shows what happens when the DPM is set for a shaped
video output and SHAPED is selected in the Map Inputs menu of
the switcher. In this case, no shaping of the input fill video takes
place and the video is added directly with the Background signal
(with key hole), producing the desired composite image.
Figure A-5. Correct Shaped Keying Operation
x
+ Invert
Background Keyhole in Background
Key
Foreground
(Key Fill) SHAPED selected in
Map Inputs Menu
(turns OFF Shaping Circuit) Shaped Video
Background
plus
Foreground
0000-02
Shaped