Motorola MC21XX SERIES Especificações descarregar pdf (Página 78)

A - 8 MC21XX Series Integrator Guide

2D Imager Decode Zones

Figure A-3 shows the decode zone for the 2D imager. Typical values appear. Table A-4 lists the typical

distances for selected bar code densities. The minimum element width (or “symbol density”) is the width in mils

of the narrowest element (bar or space) in the symbol.

Figure A-3

2D Imager Decode Zone

In.

20 mil Code 39

Depth of Field

19.7

81216

10.2 20.3

30.5

40.6

50.8

13 mil (100% UPC)

11.7

1.6

15 mil PDF417

10.2

20.3

* Minimum distance determined by symbol length and scan angle.

10.2

in.

Note: Typical performance at 73˚F (23˚C)

on high quality symbols in normal room light.

Vcc = 3.3V

11.2

15 mil Data Matrix

2.3

9.0

10 mil PDF417

9.9

7.5 mil Code 39

6.67 mil PDF417

1.9

6.9

5 mil Code 39

1.4

7.3

5 mil PDF417

2.8

4.5

3 mil Code 39

2.7

4.2

ESC

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Motorola MC21XX SERIES Especificações Página 78

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