Zebra MC55

A - 12 MC55 Integrator Guide
SE4400 Decode Zones
Near Focus
Figure A-4 shows the decode zone for the Near Focus SE4400. Typical values appear. Table A-3 lists the typical
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.
Figure A-4 SE4400 Near Focus Decode Zone
In.
cm
0
20 mil Code 39
Depth of Field
11
2
46 8
10
0
5.1
10.2
15.2
20.3
25.4
13 mil (100% UPC)
7.5
5 mil
Code 39
2.25
8.75
3.5
7.0
15 mil PDF417
0
cm
W
i
d
t
h
o
f
F
i
e
l
d
0
1.75
4.4
3.5
8.9
8.9
*
*
* Minimum distance determined by symbol length and scan angle.
1.75
3.5
4.4
in.
Note: Typical performance at 73˚F (23˚C)
on high quality symbols in normal room light.
Vcc = 3.3V
12
30.5
7.5 mil Code 39
2.75
7.75
6.67 mil PDF417
3.75
6.0
10 mil PDF417
3.25
7.25