Motorola STB4278, Руководство пользователя, Страница: 403 / 418

Glossary GL-7
Host Computer A computer that serves other terminals in a network,
providing such services as computation, database access,
supervisory programs, and network control.
IEC International Electrotechnical Commission. This
international agency regulates laser safety by specifying
various laser operation classes based on power output
during operation.
IEC (825) Class 1 This is the lowest power IEC laser classification.
Conformity is ensured through a software restriction of 120
seconds of laser operation within any 1000 second window
and an automatic laser shutdown if the scanner's
oscillating mirror fails.
Intercharacter Gap The space between two adjacent bar code characters in a
discrete code.
Interleaved 2 of 5 A binary bar code symbology representing character pairs
in groups of five bars and five interleaved spaces.
Interleaving provides for greater information density. The
location of wide elements (bar/spaces) within each group
determines which characters are encoded. This continuous
code type uses no intercharacter spaces. Only numeric (0 to
9) and START/STOP characters may be encoded.
Interleaved Bar Code A bar code in which characters are paired together, using
bars to represent the first character and the intervening
spaces to represent the second.
LASER - Light Amplification by Stimulated
Emission of Radiation
The laser is an intense light source. Light from a laser is all
the same frequency, unlike the output of an incandescent
bulb. Laser light is typically coherent and has a high energy
density.
Laser Diode A gallium-arsenide semiconductor type of laser connected
to a power source to generate a laser beam. This laser type
is a compact source of coherent light.
Laser Scanner An optical bar code reading device using a coherent laser
light beam as its source of illumination.
LED Indicator A semiconductor diode (LED - Light Emitting Diode) used as
an indicator, often in digital displays. The semiconductor
uses applied voltage to produce light of a certain frequency
determined by the semiconductor's particular chemical
composition.
Master The first Bluetooth device initiating the radio connection
(Discovery procedure).
Matrix Symbols A 2-dimensional array of regular polygon shaped cells
where the center-to-center distance of adjacent elements
is uniform. The arrangement of the cells represents data
and/or symbology functions. Matrix symbols may include
recognition patterns that do not follow the same rule as the
other elements within the symbol (i.e., Data Matrix and
MaxiCode).
MIL 1 mil = 1 thousandth of an inch; a unit of measure often
used to quantify bar code printing and scanning
dimensions.