Quantum Data 881 User Manual page 735

GAMA
Class
Description
Command syntax
Query syntax
Query response
Other required
commands
Example
882 Video Test Instrument User Guide (Rev A.35)
GAMmA correction factor
Format parameter setting - Digital video signal
Establishes the current video gamma correction factor. The GAMA? query returns the
current setting of the gamma correction factor.
GAMA factor
factor
min = 0.1 (floating point accepted)
max = 10.0 (floating point accepted)
For HDMI video signals GAMA is always 2.222
GAMA?
factor
Gamma correction must be enabled with the
correction factor. The FMTU
ALLU command updates hardware to the new setting and redraws the test image.
GAMC 1 // Enable gamma correction in buffer
GAMA 2.2 // Set correction factor in buffer
FMTU // Update hardware to current buffer contents
GAMC
command instructs the generator to use the new setting. The
command in order to use the gamma
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