Grass Valley Kayenne XL Package v.7.0.4 - Manual (Page 32)

30 Kayenne XL Package — User Manual
Section 2 — Concepts
output signal going out the right side. In earlier generation switchers, the
terms crosspoint button and crosspoint bus have been used in reference to
control panel source selection.
For a Kayak HD system, the terms source button and source bus will be used.
These terms better reflect a system operating philosophy that is source
rather than crosspoint based.
The Kayak HD system does not directly associate a source select button
with a physical crosspoint. The association goes first through source to
button mapping, then through source definition to find the physical inputs.
A single source button can control crosspoints on different buses simulta-
neously. For example, during keying, both the video and key signals of a
source can be selected with a single button press.
In this case two different crosspoints on separate buses (key fill bus and key
cut bus) are actually switched when the button is pressed.
In the upper part of Figure 2 below, the video component of source 2 in the
figure has been selected on the key fill bus and becomes the key fill signal
for subsequent keying. The key component of source 2 selected on the key
cut bus becomes the key cut signal for keying. The lower part of
Figure 2
below shows how the same source (source 4) can be selected for both the
key fill and key cut signals.
Figure 2. Multiple Crosspoint Control
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