2–3
Operational Description
Red illumination is compatible with most printing inks including most
thermal papers. Because it provides a visual indication to the operator that
the scanner is functioning, red illumination is considered to be more user
friendly. Visual feedback to the operator is an important consideration
when making a scanner selection.
2.5.2
Scanning Aperture
Scanning performance is affected by the size of the scanning aperture and
it is a significant factor to be considered when selecting a scanner. The
scanning aperture defines the effective size of the area of the bar code
symbol viewed by the scanner optics. It affects the relative ability of the
scanning device to “see” or resolve bars and ignore printing defects.
Large aperture systems typically cannot resolve high density bar code or
the small printing features (voids within bars or dark specs within the light
areas) that small aperture systems would. Thus, they are more compatible
with low density bar code and more tolerant of printing defects
characteristic of poorly printed labels.
Small aperture systems (high resolution) are better able to resolve which
makes them compatible with high density good quality symbol reading
requirements.
The SCANTEAM 2380 is available with circular apertures ranging from 6
to 8 mil.
Most scanning applications can be satisfied with a 6 mil (high resolution)
or a 8 mil (low resolution) aperture. When selecting an aperture, it is
recommended that the aperture dimension be no less than 0.7 times the “X”
(width of the narrowest bar code coding element) dimension to be read.
An aperture size that is slightly smaller than the narrowest bar code
element, 0.9 times “X,” provides optimum resolution of the bars and results
in the generation of a digital signal which accurately represents the bar
code. An 8 mil (0.2mm) aperture is often a good compromise when labels
produced by different printing and label generation methods must be read
with one scanner. In no case should the viewing aperture exceed 1.2 the
“X” dimension.
Summary of Contents for SCANTEAM 2380
Page 1: ...Keyboard Wedge Decoded Out Wand Technical Manual...
Page 2: ......
Page 6: ...Limited Warranty...
Page 20: ...2 6 Operational Description...
Page 24: ...3 4 Set Up and Installation...
Page 48: ...5 6 Maintenance and Troubleshooting...
Page 65: ...Warranty Information i Y Cable Interface Connections 3 2...
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