User's Guide

MC3000 User Guide2-22
3. Hold the mobile computer between two and nine inches (depending on symbol density) from the symbol, centering the
aiming pattern cross hairs on the symbol.
4. Press the scan button. The Scan LED Indicators illuminate red to indicate that the laser is on. The Scan LED Indicators
illuminate green and a beep sounds to indicate a successful decode.
Imager Decode Ranges
The decode ranges provide the decode distances for barcodes of specified densities. Figure 2-19 shows the imager decode ranges
and Table 2-8 on page 2-23 lists the scan ranges for the 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.
Figure 2-19. MC3000 Imager Decode Ranges
in.
cm
MC3000
5 mil
6.5
PDF417 6.67 mil
7.5 mil
7.7
10.7
11.1
14.2
14.4
UPC A
PDF417 15 mil
18.9
20 mil
W
i
d
t
h
o
f
F
i
e
l
d
Depth of Field
Note: Typical performance at 73˚ F (23˚ C)
on high quality symbols.
0
0
5
12.7
4.3
0
1
2
3
0
2.54
5.08
7.62
2.54
5.08
1
2
4 10.16
in. cm
7.623
10.164
3.3
5.3
4.5
10
25.4
15
38.1
PDF417 10 mil
2.5
3.8
2.8
20
50.8
5
12.7
5
12.7
15.246
15.246