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RJS Inspector D4000 Laser (FIRMWARE version A.05 and Earlier) User Manual

Page 77

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Appendix K

Operator

s Guide

002-5568

RJS, Minneapolis, MN

71

Scanner

An electronic device that converts printed information into electrical signals.


Scan Reflectance Profile

A record (usually graphically represented) of the reflectance measured using the refer-
ence reflectivity method as a function of distance across the entire barcode symbol.


Segment

Refers to the left and right grouping of modules or elements into segments to designate
parity for checking validity of a scan.


Self-checking

A barcode or symbol that uses a checking algorithm, that can be applied to each character, to
guard against undetected errors. (Non-self-checked codes may use a check digit or other redun-
dancy in addition to the data message.)


Show-through

The generally undesirable property of a substrate that allows underlying markings of ma-
terials to affect reflectance.


Space

The element of a barcode symbol whose reflectance is greater than the global threshold.
A Space is the light reflective element. (As opposed to a bar which is the dark reflective
element.)


Space Reflectance (Rs)

Reflectance of a space.

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