Symbol PDT 7500 Series Product Reference Manual page 88

PDT 7500 Series Product Reference Guide for Windows
In all cases, make sure the scan pattern extends at least 3/4 inch beyond each edge of
!
the bar code (Figure
The 2-D bar code symbol has multiple rows, but the raster pattern also has multiple
!
scanning rows. For this reason, do three basic things as you scan:
" Center the aiming pattern on the bar code, as illustrated before.
" Keep the pattern in the same horizontal plane as the bar code.
3/4"
Figure 7-4. Orienting Scanning Pattern On 2-D Bar Code
" If the vertical scan pattern is not high enough to cover a "tall" 2-D 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
Figure 7-5. Moving Scan Pattern Upward and Downward on "Tall" PDF Symbol
7-8
7-4).
®
CE
3/4"
(Figure 7-5).