Blackmagicdesign ATEM mini Installation And Operation Manual page 45

When selecting the elements of the next transition, the switcher operator should look at the
preview video output because it provides an accurate representation of what the program
output will look like after the transition is completed. When only the BKGD button is selected, a
transition from the current source on the program bus to the source selected on the preview
bus will occur without the keyer. You can also select only keyer to transition, leaving the current
background live throughout the transition.
ON AIR
The ON AIR indicator button indicates when the key is currently on air and can also be used to
immediately cut the key on or off air.
Downstream Keyer
TIE
The TIE button will enable the downstream keyer, or DSK, on the preview output, along with the
next transition effects and tie it to the main transition control so that the DSK can be taken to air
with the next transition.
The DSK will transition at the rate specified in the 'rate' display of the transition control block. If
the DSK is tied, the signal routing to the clean feed 1 is unaffected.
ON AIR
The ON AIR button is used to cut the DSK on or off air and indicates whether the DSK is
currently on or off air. The button is illuminated if the DSK is currently on air.
AUTO
The AUTO button will mix the DSK on or off air at the rate specified in the DSK 'rate' window.
This is similar to the main AUTO rate on the transition control block, however it's limited only to
the downstream keyer. This can be used to fade up and down bugs and logos, such as live or
replay bugs during production, without interfering with the main program production transitions.
Fade to Black
Downstream key and fade to black
ATEM Software Control 45