Scanning Considerations; Linear Scanning - Motorola MC7090CN User Manual

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Image Capture Mode: Use this mode to capture an image within the EDA's field of view. This is useful
•
for capturing signatures or images of items like damaged boxes.

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

Linear Scanning

Ensure that a scan enabled application is loaded on the EDA.
1.
Aim the scan window at the bar code.
2.
Linear Scanning
Figure 2-12