Datalogic DS6300 Reference Manual page 102

Skew
Rotation about the Y-axis. Rotational deviation from correct horizontal and vertical
orientation; may apply to single character, line or entire encoded item. See par. 2.5.
Step-a-Head™
Step-a-Head™ makes it possible to rotate the reader head and the decoder base
independently from each other. As a result of the Step-a-Head™, the DS6300 can always be
installed in the ideal position. It is possible to change the orientation of the connector panel
while the laser window remains in the desired position.
Symbol
A combination of characters including start/stop and checksum characters, as required, that
form a complete scannable barcode.
Tilt
Rotation around the Z axis. Used to describe the position of the barcode with respect to the
laser scan line. See par. 2.5.
Trigger Signal
A signal, typically provided by a photoelectric sensor or proximity switch, which informs the
scanner of the presence of an object within its reading zone.
UPC
Acronym for Universal Product Code. The standard barcode type for retail food packaging in
the United States.
Visible Laser Diode
A light source used in scanners to illuminate the barcode symbol. Generates visible red light
at wavelengths between 630 and 680 nm.
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