Instruction manual

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KONA 3G Installation and Operation Manual — Standard Mode Control
YUV-RGB Conversion: These pulldowns select industry standard color space and gamma
transfer functions for the YUV-RGB conversion, or allow you to direct the KONA card to
automatically determine it for you.
Colorspace—choose from:
Rec 601
Rec 709
Auto
Gamma—choose from the following:
Linear (1.8)
Rec 601 (2.20)
Rec 709 (2.22)
Auto
RGB Range—The RGB Range pulldown menu allows you to select either Full range (0-
1023) or SMPTE range (typically 64-940) for RGB color output.
Enable Custom LUTs—this checkbox enables a custom color lookup table (LUT) for use in
Final Cut Pro. When checked, there will be a new “Custom LUT” menu item under the
Windows menu in the KONA Control Panel. Selecting that item brings up the “Custom LUTs”
dialog shown on the following page. Defining a LUT applies it to the KONA 3G output. The
custom LUT will be saved with the Final Cut Pro presets. 1D LUTs are supported for import,
but not 3D LUTs.
The KONA 3G has an additional window in the KONA Control Panel for Custom LUTs. In
this window there is a pulldown where users see choices like Linear, User Linear, etc. In
this list is “Load File...” AJA can only support 1D LUTs, not 3D LUTs—and 1D LUTs should
be considered appropriate for viewing purposes and tape mastering to video, but not for
hyper-critical color correction where the goal is to go back to film. In these cases a
hardware or software application that can use 3D LUTs would be more appropriate. 1D
LUTs can be created or obtained from a number of companies including Kodak and
Thomson Grass Valley, to name a few. Often a 1D LUT can be derived from a 3D LUT, so
you still will have an accurate reference for viewing and video mastering.
LUTs have two major parameters to remember: they are for turning material from its raw
form to a viewable representational form, and they should also be calibrated for the
device being displayed upon: LCD, CRT or projector.
The AJA Custom LUT supports the loading of a tabbed text file which could be created in
either an application like TextEdit or Microsoft's Excel. The document would consist of 3
columns representing 1024 values for each of the R, G and B columns.
Note: Custom LUTs only work with RGB material.