Scanning Considerations; Bar Code Capture With Imager - Motorola MC40 User Manual

MC40 User Guide
• Cross-hair reticle for easy point-and-shoot operation.
• Picklist mode to decode a particular bar code from many in the field of view.
The solution uses the advanced camera technology to take a digital picture of a bar code, and executes
state-of-the-art software decoding algorithms to extract the data from the image.

3.3 Scanning Considerations

Typically, scanning is a simple matter of aim, scan, and decode where 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 farther away to find the right working range for the bar codes being scanned.
• Angle
– Scan 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 do not 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 device farther away for larger symbols.
• Move the device closer for symbols with bars that are close together.
Scanning procedures depend on the application and device configuration. An application may use different
scanning procedures from those described.

3.4 Bar Code Capture with Imager

To capture bar code data:
Procedure Steps
1 Ensure that an application is open on the device and a text field is in focus (text cursor in text field).
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MN000111A01 - August 2013