Intermec EasyCoder 4100, Руководство пользователя

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6-12
4100 Bar Code Label Printer User's Manual
Helvitica condensed 9 pt italic
Co d e 39 18 p t
Codabar
Originally developed in 1972, Codabar is a numeric symbology most commonly
used in libraries, blood banks, and air parcel express applications. Codabar is a
self-checking, discrete symbology having 16 characters in its set: the numbers 0
through 9, and the characters $, :, /, ., + and -. There are four different start/stop
codes, allowing some useful information to be conveyed in these overhead
characters. The widths of the bars and spaces to be printed can take on 18
different values, depending on the particular character. All Codabar characters
are constructed from four bars and the three intervening spaces.
Code 11
Code 11 was developed in early 1977 to satisfy requirements for a very high
density, discrete numeric bar code. The most extensive application of Code 11
has been for labeling telecommunications equipment. There are 11 different
data characters that can be represented in addition to a stop/start character. The
character set includes the 10 digits and the dash symbol. Each character is
represented by a standalone group of three bars with two included spaces. Data
security is obtained by using one or preferably two check digits.
Code 16K
Introduced in 1988, Code 16K is an alphanumeric symbology similar to Code 49
in that it employs multiple rows (from 2 to 16). Each row is fixed length and
uses a mirror image of the Code 128 coding patterns. A different start and stop
character is used on each row of the UPC encodation patterns.
Code 49
Code 49 is an alphanumeric symbology developed in 1987 as a means of
labeling very small objects. A Code 49 bar code contains from two to eight
adjacent rows, each separated by a one-module separator bar. Each row
contains four “words” encoded in a format. Each row has a start and a stop
code and contains 18 bars and is 70 modules long. These parallel rows of data
also include information indicating the row number. The bottom row also
encodes the number of rows in the symbol. The equipment keeps track of the
row numbers and the number of rows to expect. As in most bar code
symbologies, Code 49‘s bar height can be varied to suit the application
requirements. Taller bars will allow greater ranges of scanner tilt angles and
additional vertical redundancy.