Quantum Data 801GC - Manual (Page 71)

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Hatch4x3, Hatch5x4 and Hatch8x8
Description These are different versions of a crosshatch pattern
that may be called for by some display manufacturers’
test procedures. The primary version consists of white
crosshatch on a black background.
The secondary version inverts the image to black
lines on a white background.
Purpose This is a general purpose test image that can be
used to check and adjust video scan linearity and
geometry and color convergence.