Motorola MS4407 ユーザーズマニュアル
Symbol MS4404/MS4407 Specifications 4 - 15
HD/DPM Near Focus
The decode zone for the Near Focus Symbol MS440X HD and DPM versions is shown in
. Typical
values are shown.
lists 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.
symbol.
Figure 4-8
HD/DPM Near Focus Decode Zone
In.
cm
0
20 mil
Depth of Field
7.0
1
2
3
4
5
0
2.5
10.2
7.6
10.2
12.7
13 mil (100% UPC)
4.5
5 mil
2.2
5.1
1.7
4.0
15 mil PDF417
0
cm
W
i
d
t
h
o
f
F
i
e
l
d
0
3.8
3.0
7.6
7.6
*
*
* Minimum distance deter mined by symbol length and sc
an angle .
3.0
in.
Note: Typical perf ormance at 73°F (23°C)
on high quality symb
on high quality symb
ols in nor
mal room light.
Vcc = 3.3V
6
15.2
7.5 mil
1.6
4.3
6.67 mil PDF417
2.0
3.6
10 mil PDF417
1.7*
4.0
MS440X
DPM
DPM
4 mil PDF417
2.4
3.2
7
17.8
8
20.3
1.5
3.8
1.5
NOTE
The decode zone performance for DPM shown above is based on controlled conditions and is to be used
as a guide only. Decoding is affected by mark quality, type, surface, and grade as well as ambient lighting
conditions.
as a guide only. Decoding is affected by mark quality, type, surface, and grade as well as ambient lighting
conditions.