Opticon XPT 3125 Universal menubook - Manual (Page 140)

Appendix
OPTICON Universal menu book
U133
CMOS imager:
A scanning device, which uses the CMOS
technology. CMOS is an acronym for
Complementary Metal Oxide Semiconductors.
Light from a light source within the CMOS is
reflected by a bar code label and falls on an
array of light sensitive elements in the scanner,
the CMOS sensor. Whether the light is
reflected depends on black or white parts of the
bar code. The presence (or absence) of
reflected light determines the presence (or
absence) of electrical charge (electrons) in the
distinct elements. The result is an electrical
image of the bar code, which can be used for
further processing.
Composite code:
A bar code label that consists of two parts of
two different symbologies: a linear (1D) part
and a composite (2D) part. The composite part
holds meta information about the product (like
manufacturing date, quantity, etc.), while the
linear part holds the product identification code.
Data:
Digital information.
Default:
A standard option or parameter setting. Default
settings are present in the memory of a device.
If no other value or option is chosen within a
program (or bar code menu), the default
settings are automatically chosen.
Disable:
To disable an option means, to deactivate.
ECC:
An acronym for Error Correction Code. See
error correction.
ECI:
An acronym for Extended Channel
Interpretation. This refers to a method used in
2-dimensional bar codes to encode characters
in other code sets then ASCII.
Emulation:
The imitation of all or part of one device by
another so that the mimicking device can
accept the same data and perform the same
functions as the actual device.
Enable:
To enable an option means, to activate it.
Error correction:
The possibility to correct read errors in a bar
code. Most 2D bar codes have extra
information that allows correction of the bar
code. This makes it possible to read (partly)
damaged bar codes.
Fixed length:
Relates to a symbol in which the data elements
must be of specific length.
Flow control:
See handshaking.
Format:
A message or data structure that allows
identification of control and data parts by their
position within a frame.
Handshaking:
The initial exchange between two data
communication systems prior to and during
data transmission. The first unit sends a signal,
then waits for an appropriate signal in
response. A handshake method (such as XON/
XOFF), parity setting, number of data bits, and
number of stop bits.
GUI:
This key is the Windows key on a Microsoft
keyboard or the Command key on a Apple
keyboard.
HID:
An acronym for Human Interface Device.
Keyboard, mouse and barcode readers belong
to this category.