Symbol Technologies MC50 PDAs & Smartphones User Manual


 
Glossary GL-11
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.
SDK Software Development Kit
Self-Checking Code A symbology that uses a checking algorithm to detect encoding
errors within the characters of a bar code symbol.
Shared Key Shared Key authentication is an algorithm where both the AP and
the MU share an authentication key.
SHIP Symbol Host Interface Program.
SID System Identification code. An identifier issued by the FCC for each
market. It is also broadcast by the cellular carriers to allow cellular
devices to distinguish between the home and roaming service.
SMDK Symbol Mobility Developer’s Kit.
Soft Reset See Warm Boot.
Space The lighter element of a bar code formed by the background
between bars.
Spectrum24 Symbol’s frequency-hopping, spread spectrum cellular network.
Specular Reflection The mirror-like direct reflection of light from a surface, which can
cause difficulty decoding a bar code.
Spread Spectrum A technique for uniformly distributing the information content of a
radio signal over a frequency range larger than normally required
for robust transmission of data. Spreading the signal without
adding additional information adds significant redundancy, which
allows the data to be recovered in the presence of strong
interfering signals such as noise and jamming signals. The primary
advantage of spread spectrum technology is its ability to provide
robust communications in the presence of interfering signals.
Spring Radio Protocol A radio protocol that may be used by the Symbol Spectrum24 radio
card. Symbol Radio cards that use the Spring protocol also have an
Net ID.
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.
STEP Symbol Terminal Enabler Program.
Subnet A subset of nodes on a network that are serviced by the same
router. See Router.