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Operating your ATEM Switcher
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Adjusting parameters with a vectorscope
You may wish to set up a chroma key using color bars as the background source, and watching the result on
a vector scope as you perform the following procedure.
Step 1. Turn narrow off.
Step 2. Set lift to 0.
Step 3. Adjust the hue until the color hex dots are centered around black. Adjusting the hue knob
will offset the black point, and the constellation of the 6 color bar dots will rotate around the
screen.
Step 4. Adjust the gain until the color bars are near their target boxes on the vector scope. Adjusting
the gain will expand and contract the color vectors about the center.
Step 5. Adjust the Y Suppress knob until the black level is correct.
Pattern Key
A pattern key is used to display a geometric cut out of one image on top of another image. In a pattern
key the key or cut signal is generated using the switcher's internal pattern generator. The internal pattern
generator can create 18 shapes that can be sized and positioned to produce the desired key signal.
Combining a background with a fill and pattern key
Background
A full screen image.
Fill
Another full screen image you wish to overlay on top of the background.
Key/Cut
In the case of a pattern key the key/cut signal is generated by the switcher's internal
pattern generator.
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