Motorola Symbol LS4278 Product Reference Manual page 400

Glossary - 4 Symbol LS4278 Product Reference Guide
character and the intervening spaces to represent the
second.
Input/Output Ports. I/O ports are primarily dedicated to
passing information into or out of the terminal's
memory. Series 9000 mobile computers include
Serial and USB ports.
K
Key. A key is the specific code used by the algorithm to
encrypt or decrypt the data. Also see, Encryption
and Decrypting.
L
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.
M
MIL. 1 mil = 1 thousandth of an inch.
MIN. Mobile Identification Number. The unique account
number associated with a cellular device. It is
broadcast by the cellular device when accessing the
cellular system.
N
Nominal. The exact (or ideal) intended value for a
specified parameter. Tolerances are specified as
positive and negative deviations from this value.
I/O Ports. interface The connection between two devices,
defined by common physical characteristics, signal
characteristics, and signal meanings. Types of
interfaces include RS-232 and PCMCIA.
Laser Scanner. A type of bar code reader that uses a
beam of laser light.
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.
Light Emitting Diode. See LED.
Misread (Misdecode). A condition which occurs when
the data output of a reader or interface controller does
not agree with the data encoded within a bar code
symbol.
MRD. Minimum reflective difference. A measurement of
print contrast.
Nominal Size. Standard size for a bar code symbol. Most
UPC/EAN codes are used over a range of
magnifications (e.g., from 0.80 to 2.00 of nominal).