Datalogic Heron HD3130, Product Reference Manual

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Symbologies
Product Reference Guide 245
Symbologies
Decoding Levels
Decoding Levels are used to configure a bar code symbology decoder to be very
aggressive to very conservative depending on a particular customer’s needs.
• Choosing Level 1 results in a very conservative decoder at the expense of
not being able to read poorly printed or damaged labels.
• Choosing Level 5 results in a very aggressive decoder. This aggressive
behavior allows decoding of poorly printed and damaged labels at the
expense of increasing the likelihood of decoding errors.
• Choosing Level 3, which is the default setting, allows the majority of prod-
uct labels to be decoded.
There are many factors that determine when to change the decoding level for a
particular symbology. These factors include spots, voids, non-uniform bar/
space widths, damaged labels, etc. that may be experienced in some bar code
labels. If there are many hard to read or damaged labels that cannot be
decoded using a conservative setting, increase the decoding level to be more
aggressive. If the majority of labels are very good quality labels, or there is a
need to decrease the possibility of a decoder error, lower the decoding level to
a more conservative level.
Set Length
Length Control allows you to select either variable length decoding or fixed
length decoding for the specified symbology.
Variable Length:
For variable length decoding, a minimum and maximum length
may be set.
Fixed Length:
For fixed length decoding, two different lengths may be set.
Set Length 1
This feature specifies one of the bar code lengths for a given symbology.
Length 1 is the minimum label length if in Variable Length Mode, or the first
fixed length if in Fixed Length Mode.
Reference the
Symbologies on page 85 section to view the selectable range (num-
ber of characters) for the symbology being set.
Follow these instructions to set this feature:
1. Determine the desired character length. Pad the number with leading
zeroes to yield two digits. For example: 0 = 00, 5 = 05, 20 = 20, etc.
2. Scan the ENTER/EXIT PROGRAMMING MODE bar code to enter Program-
ming Mode.
3. Scan the “Select Length 1 Setting” for the symbology being set.