Barcode reader VB34
Glossary
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Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
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Code alignment
Different spacial arrangements of the code, which have an effect on the ability of the
reader to read the code. The terms tilt angle, angle of rotation and tilt describe the
angle variations of the code alignment in the X, Y and Z axes (Chapter 6.5). Changes
to the code alignment have an effect on the impulse width and thus on the decoding
of the code. The impulse width is defined as the change of the leading edge of a bar
or spacing to the falling edge of a bar or spacing over time. The impulse width is also
referred to as the transition. The rotation, tilt and visual angle have an effect on the
impulse width of the code.
Angle of rotation
A rotation around the Y axis. This deviation from the horizontal and vertical can refer
to individual characters, lines or whole coded objects (Chapter 6.5).
EEPROM
This is short for Electrically Erasable Programmable Read-Only Memory. A non
volatile memory.
Flash™
Flash™ is the new, dynamic focussing system, which is implemented in VB34.
Flash™ is able to assume any reading position from the minimum position to the
maximum position in less than 10 milliseconds. In typical applications with a reading
distance of less than 1 meter, the reading position is reached in 4 milliseconds. The
Flash™ technology makes it possible for the VB34 to cover a reading zone of more
than 2 meters.
Half duplex
Transmission of data in only one transmission direction at a given point in time.
Host
A computer, which operates terminals in a network and provides services such as
network management, database access, special programs, control programs and
programming languages.
Tilt angle
A rotation around the Z axis. Serves to describe the position of a barcode in relation
to the laser scanning line (Chapter 6.5).
Laser diode with visible wave length
A light source used in readers to illuminate the barcode symbol. It produces a red light
in an area visible to the human eye between 630 and 680 nm.