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The vertical scan pattern is not high enough to cover a tall
PDF417 symbol. Move the scanner slowly down toward the
bottom of the symbol, keeping the beam horizontal to the
rows, and then slowly back upward toward the top.
Moving Scan Pattern Up and Down on Tall PDF Symbol
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The scan beam does not have to be perfectly parallel with the
top and bottom of the symbol (up to a 4_ tilt will work).
Operating the Scanner
3–5
Publication 2755-6.4
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