User's Manual

Performing an Upstream Chroma Key
Use the following steps to perform a chroma key on your ATEM switcher.
Chroma Key Settings
To set up a chroma key on the upstream keyer on ATEM Television Studio HD:
1 The first step is to navigate to the upstream key settings in the LCD menu and set
‘next transition’ to ON. This enables the upstream keyer on the preview output so you
can see the key during the setup stage and ties the key to the next transition so it will
transition to air when the next transition is performed.
2 In the LCD menu upstream key settings, set the key type setting to ‘chroma’.
3 Return to the upstream key menu and scroll down to the fill source setting. Select the
image you want to key as the fill source.
4 Adjust the chroma key settings while watching the preview output to refine the key.
When you are happy with your settings for the chroma key, press the 'menu' button to
step back through the menu until you return to the master program output.
To set up a chroma key on the upstream keyer on an
ATEM Television Studio Pro model switcher:
1 The first step is to press the KEY 1 TIE button to enable the key on the preview output
so you can see the key during the setup stage.
Pressing the KEY 1 TIE button ties the key to the next transition so it will transition to air
when the next transition is performed.
127Keying using ATEM Switchers