Blackmagicdesign ATEM - Page 132

Keying using ATEM Switchers
Adjusting parameters with a vectorscope
You may wish to set up a chroma key using color bars as the background source, and watching
the result on a vector scope as you perform the following procedure.
1 Turn narrow chroma key range off.
2 Set lift to 0.
3 Adjust the hue until the color hex dots are centered around black. Adjusting the hue
will offset the black point, and the constellation of the 6 color bar dots will rotate around
the screen.
4 Adjust the gain until the color bars are near their target boxes on the vectorscope.
Adjusting the gain will expand and contract the color vectors about the center.
5 Adjust the Y Suppress knob until the black level is correct.
Setting up a Chroma Key on Upstream Keyer 1 using ATEM External Hardware Panels
ATEM 1 M/E Advanced Panel:
1 Press the ‘key 1’ button to enable keyer 1 on the preview output. This automatically
selects the keyers menu on the system control LCD, but you can also press the
‘keyers’ button to enter the menu directly.
2 Select the ‘chroma’ key type using the corresponding ‘key type’ control knob.
3 Select your fill source by turning the corresponding LCD control knob. You can also
select a fill source by pressing the corresponding button in the source select bus.
4 Use the ‘left’ and ‘right’ arrow buttons to access additional key parameters you may
want to adjust such as hue, gain, y suppress, lift and masking.
ATEM Broadcast Panel:
1 Press the KEY 1 button to enable the keyer on the preview output. The system
control will dynamically navigate to the KEY 1 menu. You can manually navigate to
the KEY 1 menu by pressing HOME > EFFECTS KEYS > KEY 1.
2 2 Select the CHROMA KEY menu button.
3 3 On the ATEM 1 M/E Broadcast Panel, the destination display will say key1fill. On
the ATEM 2 M/E Broadcast Panel, the KEY 1/CUT button will be lit. Select the fill
source on the select bus.
4 Adjust the chroma key controls to refine the key.
TIP When adjusting settings on ATEM 1 M/E Advanced Panel, you can restore all
settings to their defaults by holding down the shift key and pressing ‘reset’. To reset
individual parameters, hold down the shift key and press the corresponding soft
controlknob.
132