Scanning Mode Options; Scanning 2-D Bar Codes - Symbol PDT 7500 Series Product Reference Manual

PDT 7500 Series Product Reference Guide for Windows

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 press 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.
Slab Raster Aiming Option
A trigger press creates the slab raster pattern. If the target is a 1-D bar code, the slab pattern
decodes the bar code. If the target bar code is 2-D, the pattern opens up to an optimized raster
pattern as soon as the scanner is properly aligned over the bar code.
Always Raster Option
When programmed to this option, the 2-D scan element directly opens to a full raster pattern
whenever the trigger is pressed.

Scanning 2-D 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/2-D decode zones. Then pull the trigger.
The scan pattern first covers the symbol horizontally
scan pattern extends at least three-quarters of an inch beyond the edges of the bar
code.
Figure 7-2. Slab Raster Pattern on a 2-D Bar Code
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(Figure 7-2). Make sure the