Symbol LS7708 - Glossary; Aperture; AIM; ASCII

Aperture
The opening in an optical system defined by a lens or baffle that establishes the field
of view.
AIM The Automatic Identification Manufacturers Inc., a trade association.
ASCII
American Standard Code for Information Interchange. A 7 bit-plus-parity code
representing 128 letters, numerals, punctuation marks, and control characters. It is a
standard data transmission code in the U.S.
Autodiscrimination
The ability of an interface controller to determine the code type of a scanned bar code.
After this determination is made, the information content is decoded.
Bar The dark element in a printed bar code symbol.
Bar Code Density
The number of characters represented per unit of measurement
(e.g., characters per inch).
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.
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
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.
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.
Glossary