Motorola MC55 - Enterprise Digital Assistant Dokumentacja Strona 125

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Technical Specifications A - 9
Table A-2
SE950 Decode Distances
Symbol Density/
Bar Code Type/
W-N Ratio
Bar Code
Content/
Contrast
1
35 ° Typical Working Ranges 47 ° Typical Working Ranges
Near Far Near Far
4.0 mil
Code 39; 2.5:1
ABCDEFGH
80% MRD
1.50 in
3.81 cm
5.50 in
13.97 cm
1.00 in
2.50 cm
5.50 in
13.97 cm
5.0 mil
Code 39; 2.5:1
ABCDEFGH
80% MRD
1.80 in
4.57 cm
8.00 in
20.32 cm
1.25 in
3.18 cm
8.00 in
20.32 cm
7.5 mil
Code 39; 2.5:1
ABCDEF
80% MRD
2.20 in
5.59 cm
13.00 in
33.02 cm
1.50 in
3.81 cm
13.00 in
33.02 cm
10 mil
Code 39; 2.5:1
ABCDE
90% MRD
2.20 in
5.59 cm
18.00 in
45.72 cm
1.50 in
3.81 cm
18.00 in
45.72 cm
13 mil
100% UPC
12345678905
90% MRD
2.20 in
5.59 cm
24.00 in
60.96 cm
1.50 in
3.81 cm
24.00 in
60.96 cm
15 mil
Code 39; 2.5:1
ABCD
80% MRD
2.20 in
5.59 cm
28.00 in
71.12 cm
1.50 in
3.81 cm
28.00 in
71.12 cm
20 mil
Code 39; 2.2:1
123
80% MRD
2.50 in
6.35 cm
29.00 in
73.66 cm
1.75 in
4.45 cm
33.00 in
83.82 cm
40 mil
Code 39; 2.2:1
AB
80% MRD
X 33.00 in
83.82 cm
X 36.00 in
91.44 cm
55 mil
Code 39; 2.2:1
CD
80% MRD
X 42.00 in
106.68 cm
X 45.00 in
114.30 cm
Notes:
1. CONTRAST measured as Mean Reflective Difference (MRD) at 650 nm.
2. Near ranges on lower densities (not specified) are largely dependent upon the width of the bar code and the
scan angle.
3. Working range specifications at ambient temperature (23°C), Photographic quality symbols. pitch=10°, roll=0°,
skew=0°, ambient light < 150 ft-candles.
4. X - Dependent on width of bar code.
5. Distances measured from front edge of scan engine chassis.
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