Symbol MiniScan MS XX07 Series, Руководство по интеграции

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8-9
MS 3207 Specifications
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.
Table
8-3 on page 8-10 and Table 8-4 on page 8-12 list 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
Calculating
the Usable Scan Length Method on page 2-11.
Omnidirectional Decode Distances
Figure 8-5. MS 3207 Omnidirectional Decode Zone (Typical)
Depth of Field
1.00
.25
In.
cm
0
20 mil
Depth of Field
12.5
2.5 5 7.5 10 12.5
0 12.7 25.4 38.1 50.8 63.5
80% UPC
12.5
6 mil
1.00
6.5
.25 3.25
100% UPC
0
cm
W
i
d
t
h
o
f
F
i
e
l
d
0
2.5 6.35
5 12.7
12.7
1.5
1.75
* Minimum distance determined by symbol length and scan angle.
2.5
5
6.35
in.
Note: Typical performance at 68˚F (20˚C)
on high quality symbols in normal room light.
Vcc = 5V