User's Manual

There are multiple ways to transition a key to the program output. The key can be cut on or off,
it can be mixed on or off, or it can be mixed along with a background transition. Upstream keys
are transitioned to the program output using the next transition block. Downstream keyers can
be transitioned using their own transition buttons or by using the DSK TIE button to link the
transition with the main transition.
Performing Downstream Keyer Transitions
Performing a downstream keyer transition on ATEM Television Studio HD:
Downstream keyers can be transitioned on or off air via their respective downstream key LCD
menu settings. For example, set the 'tie' setting to 'on' to tie the key to the next transition, or set
the 'key' setting to 'on air' to cut the transition on or off air.
You can also perform an auto transition by selecting the 'auto' setting in the downstream key
LCD menu and pressing the 'set' button.
Performing a downstream keyer transition on an ATEM Television Studio Pro model switcher:
The downstream keyers have their own transition buttons. Once a downstream keyer is
configured it can be easily taken on and off the program output using one of the following
three methods:
1 Press the DSK CUT button to immediately turn on or turn off a downstream key on the
program output.
2 Use the DSK AUTO button to gradually transition a downstream key on or off the
program output at the rate set in the downstream key LCD menus.
3 Use the DSK TIE button to link a downstream key with the main transition control
transition. Once linked, the DSK will be mixed on or off along with any selected
transition type at the rate specified by the transition LCD menu settings.
Pressing the DSK TIE button shows the downstream keyer on the preview output.
DSK 1 MIX
Downstream keyer 1 has its own DSK 1 MIX button on the front panel that lets you immediately
mix downstream key 1 on or off air at the rate set in the downstream key LCD menu settings.
DSK parameters
Tie Switches the DSK TIE button for the respective keyer on or off.
Rate The mix rate at which the downstream keyer transitions on or off.
Key Switches the respective DSK CUT button on or off.
Auto Enables the respective DSK AUTO button to transition the keyer on air.
Fill Source Selects the source to be keyed.
Key Source Selects the cut source which masks the fill source.
Pre Multiplied Key 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 high.
144Keying using ATEM Switchers