11
“Tall” PDF Bar Codes
If the PDF417 symbol is “tall,” the vertical scan pattern may
not be high enough to cover it.
In this case, try a slow “up and down” scanning motion.
With the raster pattern open, try to move the scanner slowly
down toward the bottom of the symbol, keeping the beam
horizontal to the rows, and then slowly back upward to-
ward the top.
The scan beam does not have to be perfectly parallel with
the top and bottom of the symbol (up to a 4
o
tilt will
work).
Moving Scan Pattern Upward and Downward on
“Tall” PDF Symbol
