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MS 3207 Decode Zones
The decode zone is a function of various symbol characteristics including density, print
contrast, wide to narrow ratio and edge acuity. The figures shown are typical values.
8-3 on page 8-10
and
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, see
the Usable Scan Length Method
Omnidirectional Decode Distances
Note: Typical performance at 68˚F (20˚C)
.25
In.
cm
Figure 8-5. MS 3207 Omnidirectional Decode Zone (Typical)
Table 8-4 on page 8-12
on page 2-11.
on high quality symbols in normal room light.
Vcc = 5V
1.00
6 mil
.25
3.25
80% UPC
1.00
1.5
1.75
Depth of Field
0
2.5
0
12.7
25.4
Depth of Field
* Minimum distance determined by symbol length and scan angle.
list the typical and guaranteed distances for
100% UPC
20 mil
5
7.5
10
38.1
50.8
MS 3207 Specifications
Calculating
in.
cm
12.7
5
6.35
2.5
0
0
2.5 6.35
5
12.7
12.5
12.5
12.5
63.5
Table
W
i
d
t
h
o
f
F
i
e
l
d
8-9
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