Hand Held Products IT4410 User Manual

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.

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