Motorola MC50 User Manual page 88

Glossary - 10 MC50 with Windows Mobile 5.0 User Guide
R
RAM. Random Access Memory. Data in RAM can be accessed in random order, and quickly written and read.
Reflectance. Amount of light returned from an illuminated surface.
Resolution. The narrowest element dimension which is distinguished by a particular reading device or printed
with a particular device or method.
RF. Radio Frequency.
ROM. Read-Only Memory. Data stored in ROM cannot be changed or removed.
Router. A device that connects networks and supports the required protocols for packet filtering. Routers are
typically used to extend the range of cabling and to organize the topology of a network into subnets. See
Subnet.
RS-232. An Electronic Industries Association (EIA) standard that defines the connector, connector pins, and
signals used to transfer data serially from one device to another.
S
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.
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.
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.