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.
Interface
A shared boundary defined by common physical interconnection characteristics,
signal characteristics and meanings of interchanged signals.
LED (Light Emitting Diode)
A low power electronic device that can serve as a visible or near infrared light source
when voltage is applied continuously or in pulses. It is commonly used as an
indicator light and uses less power than an incandescent light bulb but more than a
Liquid Crystal Display (LCD). LEDs have extremely long lifetimes when properly
operated.
Multidrop Line
A single communications circuit that interconnects many stations, each of which
contains terminal devices. See RS485.
Parameter
A value that you specify to a program. Typically parameters are set to configure a
device to have particular operating characteristics.
Picket-Fence Orientation
When the barcode’s bars are positioned vertically on the product, causing them to
appear as a picket fence. The first bar will enter the scan window first. See par. 3.2.
Pitch
Rotation of a code pattern about the X-axis. The normal distance between center line
or adjacent characters. See pars. 2.2.1 and 2.5.
Position
The position of a scanner or light source in relation to the target of a receiving
element.
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