Motorola MS4407 用户手册
Symbol MS4404/MS4407 Specifications 4 - 17
HD/DPM Far Focus
. Typical values
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.
Figure 4-9
HD/DPM Far Focus Decode Zone
In.
cm
0
20 mil
Depth of Field
14.5
3
6
9
12
15
0
7.6
15.2
22.9
30.5
38.1
13 mil (100% UPC)
10.2
5 mil
2.5
10.5
3.5
7.0
15 mil PDF417
0
cm
W
i
d
t
h
o
f
F
i
e
l
d
0
2
5.1
4
10.2
10.2
*
* Minimum distance deter mined by symbol length and sc
an angle .
4
5.1
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
7.5 mil
2.7
9.0
10 mil PDF417
3.8
9.0
MS440X
DPM
DPM
2
6.67 mil PDF417
4.0
7.1
2.7*
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.