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Blackmagic Design ATEM 1 M/E Manual De Instalación Y Funcionamiento página 96

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Operating your ATEM Switcher
96
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 control block.
Using Downstream Keyer Transitions
The downstream keyers have their own transition buttons and transition rate windows. Once a downstream
keyer is configured it can be easily taken on and off the program output using one of the following three
methods:
Step 1. Press the DSK CUT button to immediately turn on or turn off the downstream key on the program
output.
Step 2. Use the DSK AUTO button to gradually transition the downstream key on or off the program
output at the rate displayed in the DSK rate window.
Step 3. Use the DSK TIE button to link the downstream key with the main transition control block.
Once linked the DSK will be mixed on or off along with any transition type selected in the main
transition control block at the rate specified by the transition control block.
Pressing the DSK TIE button shows the downstream keyer on the preview output.
It is not possible to preview a downstream keyer transition when linked with the main transition
block. If the DSK TIE button is on when you switch to preview transition mode the tie functionality
will be ignored until the preview transition mode is turned off.
DSK parameters:
The clip level adjusts the threshold at which the key cuts its hole. Decreasing the
Clip
clip level reveals more of the background. If the background video is completely
black then the clip value is too high.
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 (brightness) is not
affected.
Rate
The mix rate at which the downstream keyer transitions on or off.
Inverse
Inverts the key signal.
Pre-Mult
Identifies the key signal as a pre-multiplied key.

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