Symbol MK2200 MicroKiosk, Руководство по продукции

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Glossary - 3
Code 93. An industrial symbology compatible with Code 39 but offering a full character ASCII
set and a higher coding density than Code 39.
Code Length. Number of data characters in a bar code between the start and stop characters,
not including those characters.
Continuous Code. A bar code or symbol in which all spaces within the symbol are parts of characters.
There are no intercharacter gaps in a continuous code. The absence of gaps
allows for greater information density.
Dead Zone. An area within a scanner's field of view, in which specular reflection may prevent a
successful decode.
Decode. To recognize a bar code symbology (e.g., UPC/EAN) and then analyze the content
of the specific bar code scanned.
Decode Algorithm. A decoding scheme that converts pulse widths into data representation of the
letters or numbers encoded within a bar code symbol.
Decryption. Decryption is the decoding and unscrambling of received encrypted data. Also see,
Encryption and Key.
Depth of Field. The range between minimum and maximum distances at which a scanner can read
a symbol with a certain minimum element width.
DHCP. (Dynamic Host Configuration Protocol) Software that automatically assigns IP
addresses to client stations logging onto a TCP/IP network. Similar to BOOTP,
but also permits the leasing of an IP address. It eliminates having to manually
assign permanent IP addresses. DHCP software typically runs in servers and
is also found in network devices such as routers that allow multiple users
access to the Internet.
DHCP Server. A server in the network or a service within a server that assigns IP addresses.
Discrete Code. A bar code or symbol in which the spaces between characters (intercharacter
gaps) are not part of the code.
Discrete 2 of 5. A binary bar code symbology representing each character by a group of five bars,
two of which are wide. The location of wide bars in the group determines which
character is encoded; spaces are insignificant. Only numeric characters (0 to
9) and START/STOP characters may be encoded.
EAN. European Article Number. This European/International version of the UPC
provides its own coding format and symbology standards. Element dimensions
are specified metrically. EAN is used primarily in retail.
Element. Generic term for a bar or space.
Encoded Area. Total linear dimension occupied by all characters of a code pattern, including
start/stop characters and data.
ENQ (RS-232). ENQ software handshaking is also supported for the data sent to the host.