Microscan MS-4X User Manual download pdf (Page 223)

MS-4X Imager User Manual

8-11

Symbol Quality

Axial Non-Uniformity (Data Matrix Only)

Unused Error Correction (Data Matrix Only)

Definition: Axial non-uniformity is a measure of how much the sampling point

spacing differs from one axis to another, namely AN = abs (XAVG -

YAVG) / ((XAVG + YAVG)/2) where abs () yields the absolute value. If a

symbology has more than two major axes, then AN is computed for those

two average spacings which differ the most. (ANSI) axial non-uniformity

grading is defined this way:

A (4.0) if AN < .06

B (2.0) if AN < .08

C (2.0) if AN < .10

D (1.0) if AN < .12

F (0.0) if AN > .12

If enabled, the axial non-uniformity is appended to the symbol data

according the ISO/IEC 16022 Symbol Quality Output Mode setting.

Serial Cmd: <K709,symbol contrast,print growth,axial non-uniformity,UEC>

Default: Disabled

Options: 0 = Disabled 1 = Enabled

Definition:

The correction capacity of Reed-Solomon decoding is expressed in the

equation: e + 2d < d - p, where

is the number of erasures,

is the number

of error correction code words, and

is the number of code words reserved

for error detection.

A (4.0) if UEC > .62

B (3.0) if UEC > .50

C (2.0) if UEC > .37

D (1.0) if UEC > .25

F (0.0) if UEC < .25

If enabled, the UEC is appended to the symbol data according to the

ISO/IEC 16022 Symbol Quality Output Mode setting.

Serial Cmd: <K709,symbol contrast,print growth,axial non-uniformity,UEC>

Default: Disabled

Options: 0 = Disabled 1 = Enabled

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Microscan MS-4X User Manual Page 223