Symbol SE 923, Руководство по интеграции

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3-4
SE-923 Scan Engine Integration Guide
Decode Zone
The decode zone for the SE-923-I000A scan engine is shown in Figure 3-2 . The figures shown
are guaranted values. Table 3-2 lists the typical and guaranteed 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. The maximum usable length of a symbol at
any given range is shown below. To calculate this distance, refer to the formula on the
following page.
Figure 3-2. SE-923-I000A Standard Version Decode Zone
in.
cm
SE 923
5 mil
2.2 5.0
7.5 mil
10 mil
7.5
9.7
100% UPC
12
15
22
20 mil
40 mil
29
*
55 mil
*Minimum distance determined by symbol length and scan angle
0
5
10
15
0
12.7
25.4
38.1
12.7
25.4
38.1
5
10
in. cm
W
i
d
t
h
o
f
F
i
e
l
d
Depth of Field
Note: Guaranted performance at 73.4
°
F (23
°
C)
on high quality symbols.
1.8
0
0 5
12.7
10
25.4
15
38.1
20
50.8
25
63.5
30
76.2
15
2.0
2.0