User Manual

Performing an Upstream Luma/Linear Key
Since luma and linear keys use the same parameters, they are set up on the software control
panel and advanced panel using a common menu, called the luma key menu. What defines the
key as being either luma or linear is in the selection of fill and key sources. In a luma key, fill and
key sources are the same. For a linear key, fill and key sources are different.
To set up a luma key on the upstream keyer in ATEM SDI Extreme ISO models:
1 Select the K1LUM button in the select bus.
2 Select the fill and key source from the select bus.
When performing a luma key, the same source is used for both fill and key.
You can now refine your key using ATEM Software Control.
To set up a luma/linear key on the upstream keyer in ATEM Software Control:
1 Expand the upstream key 1 palette and select luma tab.
2 Select the fill source and key source.
If performing a luma key, select the same source for both fill and key.
Adjust the key parameters to refine the key. For a description of luma key parameters, refer to
the table below.
Select sections of the Palette you wish to reset
from the reset menu
109Keying using ATEM SDI