Motorola MC3000 Dokumentacja Strona 190

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A - 8 MC3000 Integrator Guide
Imager Decode Ranges
The decode ranges provide the decode distances for barcodes of specified densities. Figure A-3 shows the imager
decode ranges and Table A-5 on page A-9 lists the scan ranges for the 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. The
maximum usable length of a symbol at any given range is shown below.
Figure A-3
MC3000 Imager Decode Ranges
in.
cm
MC3000
5 mil
6.5
PDF417 6.67 mil
7.5 mil
7.7
10.7
11.1
14.2
14.4
UPC A
PDF417 15 mil
18.9
20 mil
W
i
d
t
h
o
f
F
i
e
l
d
Depth of Field
Note: Typical performance at 73˚ F (23˚ C)
on high quality symbols.
0
0
5
12.7
4.3
0
1
2
3
0
2.54
5.08
7.62
2.54
5.08
1
2
4 10.16
in. cm
7.623
10.164
3.3
5.3
4.5
10
25.4
15
38.1
PDF417 10 mil
2.5
3.8
2.8
20
50.8
5
12.7
5
12.7
15.246
15.246
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