Motorola Symbol MS4404 Integration Manual page 410

Glossary - 2 Symbol MS4404/MS4407 Integration Guide
Bar Code Character. A single group of bars and spaces which represent an individual number, letter, punctuation mark or
other symbol.
Bar Code Density. The number of characters represented per unit of measurement (e.g., characters per inch).
Bar Code Reader. A device used to read or decode a bar code symbol.
Bar Code Symbol. The combination of symbol characters and features required by a particular symbology, including quiet
zones, start and stop characters, data characters, check characters and other auxiliary patterns, that together form a
complete scannable entity. See Symbol.
Bar Height. The dimension of a bar measured perpendicular to the bar width.
Bar Width. Thickness of a bar measured from the edge closest to the symbol start character to the trailing edge of the same
bar.
Baud Rate. A measure of the data flow or number of signaling events occurring per second. When one bit is the standard
"event," this is a measure of bits per second (bps). For example, a baud rate of 50 means transmission of 50 bits of data
per second.
Bi-directional. Denotes that a machine-readable symbol can be read successfully in two directions – either backwards or
forwards. Also identifies a scanner that can operate or a bar code that can be read independent of scanning direction.
Binary. Denotes a numbering system to base 2 in which numbers are expressed as combinations of the digits 0 and 1 with
positional weighting based on powers of 2. In computing, these can be represented electrically by 'off' and 'on'
respectively or in machine-readable symbols by narrow and wide elements or by the absence or presence of a bar
module.
Bit. Binary digit. One bit is the basic unit of binary information. Generally, eight consecutive bits compose one byte of data.
The pattern of 0 and 1 values within the byte determines its meaning.
Bits per Second (bps). Bits transmitted or received.
bps. See Bits Per Second.
Byte. On an addressable boundary, eight adjacent binary digits (0 and 1) combined in a pattern to represent a specific
character or numeric value. Bits are numbered from the right, 0 through 7, with bit 0 the low-order bit. One byte in
memory is used to store one ASCII character.
or
A sequential series of bits comprising one character and handled as one unit. Usually encoded in the ASCII format, a
byte usually consists of eight bits and represents one alphabetic or special character, two decimal digits or eight binary
bits.
C
CDRH. Center for Devices and Radiological Health. A federal agency responsible for regulating laser product safety. This
agency specifies various laser operation classes based on power output during operation.
CDRH Class 1. This is the lowest power CDRH laser classification. CDRH Class 1 devices are safe under reasonably
foreseeable conditions of operation. Software and other controls to limit exposure to laser light may be required to
achieve CDRH Class 1 operation. The CDRH time base for Class 1 devices is 10,000 seconds.