Data Capture 5 - 3
Figure 5-3 DS3678 Digital Scanner
Scanning Considerations
Typically, scanning is a simple matter of aim, scan, and decode and a few quick trial efforts master it. However,
consider the following to optimize scanning performance:
• Range: Any scanning device decodes well over a particular working range — minimum and maximum
distances from the bar code. This range varies according to bar code density and scanning device optics.
Scanning within range brings quick and constant decodes; scanning too close or too far away prevents
decodes. Move the scanner closer and further away to find the right working range for the bar codes being
scanned.
• Angle: Scanning angle is important for promoting quick decodes. When laser beams reflect directly back into
the scanner from the bar code, this specular reflection can “blind” the scanner. To avoid this, scan the bar
code so that the beam does not bounce directly back. But don’t scan at too sharp an angle; the scanner
needs to collect scattered reflections from the scan to make a successful decode. Practice quickly shows
what tolerances to work within.
• Hold the TC70x/TC75x farther away for larger symbols
• Move the TC70x/TC75x closer for symbols with bars that are close together.
Bar Code Scanning with Internal Imager
To read a bar code, a scan-enabled application is required. The TC70x/TC75x contains the DataWedge application
that allows the user to enable the imager, decode the bar code data and display the bar code content.
1. Ensure that an application is open on the TC70x/TC75x and a text field is in focus (text cursor in text field).
2. Point the exit window on the top of the TC70x/TC75x at a bar code.
NOTE Scanning procedures depend on the application and TC70x/TC75x configuration. An application may use
different scanning procedures from the one listed above.
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General
Weight and Dimensions
