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Check511
Description Five small boxes are placed in the corners and at
the center of active video. The boxes are on a black
background. Each box consists of alternating black
and white pixels that form a very fine
checkerboard. The secondary version inverts the
image, creating a white background. The colors
of the individual pixels in the boxes also are
inverted.
Test Verify monitor resolution
Purpose The resolution of your monitor should meet or
exceed the design specs.
Method First adjust the brightness, contrast, and focus to
their correct settings. You should be able to see
individual and distinct pixels in each of the boxes.
Failure to see distinct pixels may indicate you have
a defective video amplifier, focus correction circuit
or picture tube.
Note – If multicolored areas appear on a mask-type color
picture tube, you may have a problem with convergence or
you may be exceeding the resolution of the picture tube.