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The sams procedure says to hook up a color bar generator, and adjust a specific coil to maximize the amplitude of the 6th color bar, and then has a waveform where all the different color bars are labeled. The other adjustments are voltage based, and there's only three coils to adjust with all else being fixed. I am assuming the test is based on the old type of color bar pattern where the bars have space between them, and don't really know how to apply this with the signal I'm getting from my cable box. Actually tomorrow I will scan the instruction page from sams and post it here, so you can see what I mean. Perhaps buying or burning a test pattern DVD would be a better option?
Looking at the picture carefully again tonight, I think old_tv_nut has a point about purity.
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