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Select sections of the Palette you
wish to reset from the reset menu
Adjust the key parameters to refine the key. For a description of luma key parameters,
refer to the table below.
Upstream key luma/linear key parameters:
Mask Enables a rectangular mask that can then be adjusted using the top,
bottom, left and right parameters.
Pre-Mult Identifies the key signal as a pre-multiplied key.
Clip The clip level adjusts the threshold at which the key cuts its hole.
Decreasing the clip level reveals more of the background. If the
background video is completely black then the clip value is too low.
Gain The gain adjustment electronically modifies the angle between on and
off thereby softening the edges of the key. Adjust the gain value until
the edge softness is desirable but the background video luminance or
brightness is not affected.
Invert Key Inverts the key signal.
Flying Key Enables/disables DVE effects.
Setting up a Luma/Linear key on Upstream Keyer 1
using ATEM Advanced Panels
1 Press the ‘key 1’ button to enable the keyer on the preview output. This
automatically selects the keyers menu on the system control LCD, but you can
alsopress the ‘keyers’ button to enter the menu directly.
2 Select the desired M/E keyer by pressing the corresponding soft button along the
top edge of the LCD menu.
3 Use the control knob underneath the ‘key type’ indicator to choose the ‘luma’ key.
4 Rotate the ‘fill source’ and ‘key source’ control knobs to choose a fill and key
source. You can also press the corresponding buttons on the source select bus to
select the fill and key source.
5 Once you have chosen a key type, fill and source, press the ‘right’ arrow button
to scroll through to the next menu item and use the control knobs to adjust key
parameters such as mask, gain, clip, enable or disable pre multiplied key, etc.
124Keying using ATEM Switchers
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