Digital Camera; Scanning Considerations; Linear Scanning - Motorola MC55 User Manual

2 - 36 MC55 User Guide

Digital Camera

MC55 with an integrated digital camera have the following features:
•
Omnidirectional reading of a variety of bar code symbologies, including the most popular linear, postal,
PDF417, and 2D matrix code types.
•
Advanced intuitive aiming for easy point-and-shoot operation.
The camera uses digital camera technology to take a digital picture of a bar code, stores the resulting image in its
memory, and executes state-of-the-art software decoding algorithms to extract the data from the image.

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 MC55 farther away for larger symbols.
•
Move the MC55 closer for symbols with bars that are close together.
NOTE Scanning procedures depend on the application and MC55 configuration. An application may use different
scanning procedures from the one listed above.

Linear Scanning

Ensure that a scan enabled application is loaded on the MC55.
1.
Aim the scan window at the bar code.
2.