Scanning Pdf417 Bar Codes - Symbol PDT 7200 Series Product Reference Manual

PDT 7200 Series Product Reference Guide
programmed scanning option. There are two programmable timeout periods for
this option — normal and extended.
• Slab Raster Option
A trigger pull creates the slab raster pattern. If the target is a 1-D bar code, the
pattern never gets beyond a slab raster. But if the target bar code is PDF417, the
pattern opens up to an optimized raster pattern as soon as the scanner is properly
aligned over the bar code.
• Always Raster
When programmed to this option, the PDF417 scan element directly opens to a full
raster pattern whenever the trigger is pulled.

Scanning PDF417 Bar Codes

Make sure the terminal is programmed for a slab raster aiming pattern and smart raster
mode.
1. Aim the scanner at the symbol. Try to keep the nose of the scanner parallel with
the symbol's rows.
2. Make sure the symbol you want to scan is within the scanning range; refer to the
1-D/PDF417 decode zones. Then pull the trigger to scan.
The scan pattern first covers the symbol horizontally (
Figure 4-2. Slab Raster Pattern on a PDF417 Bar Code
Make sure the scan pattern extends at least three-quarters of an inch beyond the
edges of the bar code.
If the pattern is parallel to the symbol's rows, the pattern spreads vertically to cover the
symbol (Figure 4-3). If the pattern does not cover the top and bottom of the symbol, pull
the scanner back until it does.
4-10
Figure 4-2).