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Appendix
Gamma Look-up Table
The Gamma Look Up Table (LUT) can be programmed using the
GefenUpdater.exe
program from the Gefen software package. To do this, following the instructions below:
1
Create the Gamma LUT.
2
Create a standard ASCII text file with the following line:
GefenUpdater GAMMA filename.csv
where
filename.csv
is the name of the Gamma LUT file.
3
Save the file as
UpdateGamma.bat
. Make sure that the
GefenUpdater.exe
file
resides in the same directory (or is in the path) as the
UpdateGamma.bat
file.
4
Connect a USB cable from the computer to the
HDMI and DVI to 3GSDI Scaler
.
5
Power on the
HDMI and DVI to 3GSDI Scaler
. Once the scaler has powered up, run
the
UpdateGamma.bat
file.
The LUT is a standard
.CSV file. Each line contains Red, Green and Blue values separate
by comma ”,”. A value must be between 0 and 1023. A file must contain 1024 lines:
1023,0,0
(Line 1)
1023,0,0
1023,0,0
1023,0,0
1023,0,0
1023,0,0
1023,0,0
…
…
1023,0,0
(Line 1024)
