9560 Transaction Manager User's Manual - Intermec

Glossary
G
laser
Light Amplification by the Stimulated Emission of Radiation. A coherent,
monochromatic light source produced by directing a light beam repeatedly
through an active material so that it becomes amplified, and then directing the
beam into a narrow cone of divergence. The active material converts energy
into laser light, a pumping source provides power or energy, and separate
optics direct the beam through the active material and then into a narrow cone
of divergence.
laser scanner
Optical bar code reader using a low energy laser light beam.
LED
Light emitting diode. A semiconductor that produces light at a wavelength
determined by its chemical composition. Often the light source in bar code
readers.
Level Trigger mode
The laser turns on when you pull the trigger and stays on until you release the
trigger.
LRC
Longitudinal Redundancy Check character. Provides horizontal error checking
of a data block received or transmitted. Performs an XOR of the data bits
transmitted, excluding the SOM, but including the received or transmitted
EOM characters.
manufacturer’s identification number
In the UPC systems, the four- or five-digit number assigned to a manufacturer
by the Uniform Product Council, Inc. This number appears as the left half of
the UPC number.
margin
See Quiet Zone.
mil
One thousandth of an inch (0.001 inch), or approximately 0.0254 millimeter. Bar
code bar widths are commonly referred to as being a certain number of mils
wide.
G-11