Specifications

Symbol LS4278 Product Reference GuideGL-10
Radio Frequency Identification (RFID) The use of small radio transponders that are activated by a
reading transmitter. The transponder carries a unique ID
code or other information in its memory and can be read at
a distance without line of sight.
Radio Frequency Tag An electronic tag capable of receiving, storing and/or
transmitting digital information.
Reflectance Amount of light returned from an illuminated surface.
Remote Bluetooth Device Any Bluetooth device the reader can communicate with.
Resolution The narrowest element dimension which is distinguished
by a particular reading device or printed with a particular
device or method.
Scan Area Area intended to contain a symbol.
Scanner An electronic device used to scan bar code symbols and
produce a digitized pattern that corresponds to the bars and
spaces of the symbol. Its three main components are:
1. Light source (laser or photoelectric cell) - illuminates a
bar code.
2. Photodetector - registers the difference in reflected light
(more light reflected from spaces).
3. Signal conditioning circuit - transforms optical detector
output into a digitized bar pattern.
Scanning Mode The scanner is energized, programmed, and ready to read a
bar code.
Scanning Sequence A method of programming or configuring parameters for a
bar code reading system by scanning bar code menus.
Self-Checking Code A symbology that uses a checking algorithm to detect
encoding errors within the characters of a bar code symbol.
Skew Rotation of a bar code symbol on an axis parallel to the
symbol's length.
Slave A Bluetooth device which can only wait for a Bluetooth
Master device to initiate a connection with it.
Space The lighter element of a bar code formed by the background
between bars.
Space Width The thickness of a space measured from the edge closest
to the symbol start character to the trailing edge of the
same space.
Specular Reflection The mirror-like direct reflection of light from a surface,
which can cause difficulty decoding a bar code.
SPP Serial Port Profile. Bluetooth profile creating an RS232
cable replacement.
Stacked Symbol (2D Symbols) A 2-dimensional (2D) symbol with sequences of linear
(width-coded) data that are stacked one upon another (i.e.,
PDF-417).
Start/Stop Character A pattern of bars and spaces that provides the scanner with
start and stop reading instructions and scanning direction.
The start and stop characters are normally to the left and
right margins of a horizontal code.