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7 - 8
Symbol MiniScan MSXX04 Series Integration Guide
Symbol MS3204 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.
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, see
Methodon page
2-8.
Omnidirectional Decode Distances
Note: Typical performance at 68˚F (20˚C)
on high quality symbols in normal room light.
Vcc = 5V
.25
1.00
6 mil
.25
1.00
1.5
1.75
0
2.5
In.
cm
0
12.7
* Minimum distance determined by symbol length and scan angle.
Symbol MS3204 Omnidirectional Decode Zone
Figure 7-5
3.25
80% UPC
100% UPC
20 mil
Depth of Field
5
7.5
10
25.4
38.1
50.8
Depth of Field
Table 7-3 on page 7-9
in.
cm
W
12.7
5
i
d
t
6.35
2.5
h
o
0
0
f
F
2.5 6.35
i
e
l
5
12.7
d
12.5
12.5
12.5
63.5
and
Table 7-4 on page 7-11
Calculating the Usable Scan Length
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