Motorola MC21XX SERIES User Manual page 108

Glossary - 6 MC21XX Series User Guide
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.
M
MC. MC21XX.
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.
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.
MC21XX. In this text, MC21XX refers to the Motorola wireless handheld computer. It can be set up to run as a
stand-alone device, or it can be set up to communicate with a network, using wireless radio technology.
N
Nominal. The exact (or ideal) intended value for a specified parameter. Tolerances are specified as positive and
negative deviations from this value.
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).
NVM. Non-Volatile Memory.
P
Parameter. A variable that can have different values assigned to it.
PDT. Portable Data Terminal.
Percent Decode. The average probability that a single scan of a bar code would result in a successful decode. In a
well-designed bar code scanning system, that probability should approach near 100%.
Q
Quiet Zone. A clear space, containing no dark marks, which precedes the start character of a bar code symbol and
follows the stop character.