Appendix C: Scanner Settings
Options
Psion Omnii Hand-Held Computer User Manual
C-10
C.5.1
Options
•
Tap on the
+
sign next to
Options
to display these parameters.
Dot Time (msec)
The value selected for “Dot Time (msec)” determines (in milliseconds) how long the targeting dot remains
on before the scanner switches to a normal scan sweep. When you double-tap on this parameter, a dialog
box is displayed in which you can enter a value from 0 to 3000. A value of 0 (zero) disables the target dot.
Short Code
When enabled, this parameter allows scanning of short I 2 of 5 barcodes (2 characters). When disabled,
these short barcodes are rejected.
Enabling “Short Code” may reduce the robustness of the decoding since the hand-held must decode more
potential barcodes; it is therefore not recommended for general-purpose barcodes with 4 or more charac-
ters.
Verify
The value entered for this parameter determines the number of correct additional decodes required after
the initial decode, prior to a barcode being accepted. Higher values significantly increase the time it takes
to decode a barcode but also improve the reliability of the decoded barcode.
Security
This parameter controls the tolerance for decoding edge-to-edge barcodes (Code 93, Code 128, UPC/EAN).
Lower values have a lower tolerance for misreads, but they also increase the time it takes to decode the
barcode. The default value of 30 is generally a good compromise setting.
The barcode symbologies for the scanner are listed in Table C.3.
Table C.3
Non-Decoded Barcode Symbologies
Code 39
Code 93 (disabled)
Code 128
Code 11 (disabled)
EAN 13
Interleaved 2 of 5 (disabled)
EAN 8
MSI Plessey (disabled)
UPC-A
Discrete 2 of 5 (disabled)
UPC-E
IATA 2 of 5 (disabled)
Codabar (disabled)
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