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MC9000-G Product Reference Guide for Embedded Windows® CE .NET
GL-16
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.
Subnet Mask A 32-bit number used to separate the network and host
sections of an IP address. A custom subnet mask subdivides
an IP network into smaller subsections. The mask is a
binary pattern that is matched up with the IP address to turn
part of the host ID address field into a field for subnets.
Default is often 255.255.255.0.
Substrate A foundation material on which a substance or image is
placed.
SVTP Symbol Virtual Terminal Program.
Symbol A scannable unit that encodes data within the conventions
of a certain symbology, usually including start/stop
characters, quiet zones, data characters and check
characters.
Symbol Aspect Ratio The ratio of symbol height to symbol width.
Symbol Height The distance between the outside edges of the quiet zones
of the first row and the last row.