Symbol LS 3408, Product Reference Manual

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Glossary
GL-3
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.
Byte 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.
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. This
class is considered intrinsically safe, even if all laser output
were directed into the eye's pupil. There are no special
operating procedures for this class.
CDRH Class 2 No additional software mechanisms are needed to conform
to this limit. Laser operation in this class poses no danger
for unintentional direct human exposure.