Zebra MC55

A - 16 MC55 Integrator Guide
SE4500 Decode Zones
SE4500-SR
Figure A-4 shows the decode zone for the SE4500-SR. 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-6 SE4500-SR Decode Zone
In.
cm
0
20 mil Code 39
Depth of Field
24.7
5
10 15 20
25
0
12.7 25.4
38.1
50.8
63.5
13 mil (100% UPC)
14.7
1.6
15.5
15 mil PDF417
0
cm
W
i
d
t
h
o
f
F
i
e
l
d
0
4.5
11.4
9
22.9
22.9
*
*
* Minimum distance determined by symbol length and scan angle.
9
11.4
in.
Note: Typical performance at 73˚F (23˚C)
on high quality symbols in normal room light.
Vcc = 3.3V
4.5
12.4
15 mil Data Matrix
2.8
10.1
10 mil PDF417
*
10.6
7.5 mil Code 39
*
6.67 mil PDF417
3.4
7.1
5 mil Code 39
2.1
7.5