Glossary - Datalogic DS6300 Reference Manual

GLOSSARY

ACR™ 4
Each version of the base has the powerful code reconstruction technology (ACR™ 4). The
new third generation ACR considerably increases the code reconstruction reading capability
in the case of damaged or very tilted barcodes.
Aperture
Term used on the required CDRH warning labels to describe the laser exit window.
Barcode
A pattern of variable-width bars and spaces which represents numeric or alphanumeric data
in machine-readable form. The general format of a barcode symbol consists of a leading
margin, start character, data or message character, check character (if any), stop character,
and trailing margin. Within this framework, each recognizable symbology uses its own unique
format.
Barcode Label
A label that carries a barcode and can be affixed to an article.
Baud Rate
A unit used to measure communications speed or data transfer rate.
CDRH (Center for Devices and Radiological Health)
This organization (a service of the Food and Drug Administration) is responsible for the
safety regulations governing acceptable limitations on electronic radiation from laser devices.
Datalogic devices are in compliance with the CDRH regulations.
Code Positioning
Variation in code placement that affects the ability of a scanner to read a code. The terms
Pitch, Skew, and Tilt deal with the angular variations of code positioning in the X, Y and Z
axes. See par. 2.5. Variations in code placement affect the pulse width and therefore the
decoding of the code. Pulse width is defined as a change from the leading edge of a bar or
space to the trailing edge of a bar or space over time. Pulse width is also referred to as a
transition. Tilt, pitch, and skew impact the pulse width of the code.
EEPROM
Electrically Erasable Programmable Read-Only Memory. An on-board non-volatile memory
chip.
Full Duplex
Simultaneous, two-way, independent transmission in both directions.
Half Duplex
Transmission in either direction, but not simultaneously.
Host
A computer that serves other terminals in a network, providing services such as network
control, database access, special programs, supervisory programs, or programming
languages.
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