AJA KONA 3G Installation And Operation Manual page 48

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Tab Screen
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Inputs
AJA Control Panel, Block Diagram
Framebuffer—The framebuffer is the "engine" in KONA 3G where active video operations
take place using third-party editing applications, or even KONA 3G itself. The
framebuffer has a format (called the "Primary Format" and color space that it follows, as
defined in the Tabbed Windows or third-party application Easy Setups. It is important
to realize that inside the Macintosh many applications can use the KONA 3G (as you
switch from window to window) and it may not always be obvious which currently
controls it.
The Control Panel displays the name of the application controlling the KONA 3G. In
some cases, applications may not always properly "let go" of the I/O interface as
another takes over—you'll be able to tell by looking at the Control Panel.
Primary Format—The video format currently assigned to KONA 3G. This is the format that
the framebuffer will use and is shown in the Control Panel using the color blue. All
icons in blue are the same as the Primary Format used by the framebuffer. Also any text
descriptions in the block diagram that appear in blue also indicate that something is in
the primary format. So, for example, if you see that the input and output icons are blue,
then you know that the same format is used throughout the video path and that no
format conversion is being performed. If a different color is displayed on the input or
output, say green for example, then you know that KONA 3G is performing a format
conversion in the video path.
Secondary Format—Any format other than the currently selected Primary Format, is a
secondary format. As described previously, this means that either the Inputs or
Outputs are somehow different from the framebuffer's assigned format (i.e., the
"Primary Format"). This can be seen at a glance because the color will be different than
blue.
Framebuffer
Format
(Primary Format)
Outputs:
SDI, HDMI
and Analog