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Note: The reported X-dimension is approximate and based upon use of the
IT4410LR at 4.7 in (12 cm) (see "Reading Techniques" on page 1-1). If
you use different image engines, the X-dimension will vary. If you hold
the reader closer than 4.7 in (12 cm), it will have the effect of reporting a
larger than true X-dimension. Conversely, if you hold the reader farther
away than 4.7 in (12 cm), it will have the effect of reporting a smaller than
true X-dimension. Please contact HHP Application Support for additional
information. Refer to Chapter 3 for contact information.
{6} lists the number of Module Errors in the central Core Symbol, which con-
sists of the finder bullseye, four orientation clusters at its corners, and the
mode message along its perimeter. The grade is assigned as:
A if there are 0 (zero) errors,
B if there is 1 error,
C if there are 2 errors,
D if there are 3 errors
F if there are 4 or more errors.
In Screening modes, this parameter is reported as "Too many Code Symbol
Errors (3)" when that is the case.
{7} lists the Data Safety Margin. In Aztec Code symbols, the recommended
number of error correction words is a minimum that is generally exceeded
because any excess codeword capacity is filled with extra check words.
Thus this parameter often exceeds 100%, but it also can be forced to much
higher or lower levels by user options.
{8} and {9} list the Horizontal & Vertical Print Growths, respectively. When
one direction's growth is substantially larger than the other, excessive bar
dragging in the direction of label travel is indicated and should be fixed.
When both directions have excessive growth, then either (a) adjustment of
the print process or (b) undercutting of the original bar code symbol graphic
is recommended.
Data Matrix
The Full Report from a typical scan looks like the following (line numbers have
been added in curly brackets):
{1} This is a representative Data Matrix symbol
{2} >>> PQA from HHP <<<
{3} DATA MATRIX ECC200: 24 x 24 modules in size
{4} Data Field: 36 data & 24 chks in 1 block(s) of
GF(256)
{5} X roughly = 0.025"
{6} [A] < Fixed Patterns: 0 module errors