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4-10 Chapter 4: Built-In Images
Model 801GC, 801GF & 801GX¥Rev. X1
BriteBox
Description The primary version has a single white box in the
center of active video. The box size is controlled
by the MSIZ system parameter. The secondary
version (shown below) adds four boxes in the
corners of active video.
Test Brightness control adjustment
Purpose The wrong brightness setting may cause other tests
such as Contrast, Focus and Beam Size to be invalid.
An accurate brightness setting helps give repeatable
measurements throughout other tests.
Method Center your light meter probe within the center
square and adjust the monitor’s brightness control
to obtain the required light meter reading.