Quantum Data 801GC - Manual (Page 53)

4-15
Check_11
Description The active video area is filled with alternating black
a n d w h i t e p i x e l s t h a t f o r m a v e r y f i n e
checkerboard. The secondary version inverts the
colors in the image. The inverted image looks
almost the same as the non-inverted version.
Test Verify monitor resolution
Purpose The resolution of your monitor should meet or
exceed the design specs.
Method Adjust the brightness, contrast, and focus to their
correct settings first. 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.