RJS Inspector D4000 Laser (FIRMWARE version A.05 and Earlier) User Manual
Page 77
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.