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

not give specular reflection (refer to the section
should be in good condition.
1-D/PDF417 Scanning Mode Options
There are three scanning options: aiming with a dot pattern, scanning with a slab raster
pattern, or always raster.
Aiming Dot Option
!
A trigger pull creates the single dot aiming pattern, which lasts for a fixed interval.
This dot easily can be seen in outdoor or high ambient light environments. A slab
raster pattern or an open raster pattern appears next, depending on the 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 5-2. Slab Raster Pattern on a PDF417 Bar Code
Angle on page 5-7). Likewise, the symbol
(Figure
Operating the Terminal
5-2).
5-9