Ross Synergy 100 MD, Operator'S Manual

Page: 139 / 402

Synergy 100 MD Operator’s Manual (v7.2 MD-S100) Keying • 7–33
Split Keys
A Split Key is one in which you assign a different fill source for a Key. This is a Key source that is
different than the default Key/fill associations that are set up during installation and different from
those that are set up automatically for the various Key types. Split Keys are typically used for creative
montages and for Keying moving video inside Key shapes.
There are two different split Key functions:
• Split Key — A split Key allows you to hold (retain) the alpha signal of the Key and
assign a new video source to fill the hole. A typical application is when you fill your
character generator alpha signal with the live output from a VTR or camera.
• Split Video — A split video allows you to hold a (non-alpha) Key cutter and select a
new video source to fill the hole. A typical application is when you fill your title
camera’s luminance Key signal with the live output from a VTR.
In both cases, a new fill source is assigned while the hole cutter is held . The following methods allow
you to perform split Keys — without having to return to the Inputs Menu and change your Key/fill
associations.
Performing a Split Key
The Split Key function allows you to hold the alpha signal of a Key and assign a new video source to
fill the hole. A split Key can be formed in both of the Effects Keyers, and the DSK.
Use the following procedure to perform a split Key in Key 1:
1. Select a background source on the PGM bus. This provides the background over which
the Key will appear.
2. Press
KEY1
in the Transition Control Group to preview the Key. This step will also
serve to assign the Key bus and Effects Keyers Group to Key 1 .
3. Select a Key source on the Key 1 bus.
4. Press
AUTO SELECT
in the Effects Keyers Group .
5. Press and hold
AUTO SELECT
.
6. Select the new fill source on the Key 1 bus.
7. Release both buttons.
8. Adjust the Clip and Gain of the Key as needed. Refer to the section “ Performing an
Auto Select Key ” on page 7-10 for more information.
This completes the procedure for performing a split Key in Key 1.
Operating
Tip
Both buttons will now be lit on the Key 1 bus. The selected Key alpha
video source will still be lit, and the new split fill video source will be
flashing.
Note The Split Key function is a temporary assignment. If, after setting up
the split Key, you press any button on the Key Bus or select another
Key type, the split is removed and you must set up the split Key again.
Pressing
AUTO SELECT again does not re-establish the split Key.