Figure A-10 Picket Fence; Figure A-11 Angled - Microscan MS-9 User Manual

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Formulas for Number of Decodes
Single Scan Line Picket Fence Calculation
For single scan line picket fence scanning (Top Offset setting equal to Bottom Off-
set), use the following formula:
(
SW SL
------------------------- -
ND
=
ND = Number of Decodes (total per symbol)
SW = Scan Width
SL = Symbol Length
SS = Symbol Speed
DR = Decodes rate.
Example:
SL
=
2 inches (including quiet zones)
SS
=
100 inches per second
SW
=
4 inches
DR
=
1000 decodes per second
(
)
4 2
×
----------------
1000
100
Angled Picket Fence Calculation
The number of complete scans for angled picket fence is
calculated the same as that for picket fence, with the
exception that the scan width is shortened in proportion
to scan tilt.
MS-9 Scanner User's Manual
A-28
)
×
DR
3
SS
3
=
17 complete decodes
Direction of label travel
Scan
Line

Figure A-10 Picket Fence

Direction of label travel
Scan Line

Figure A-11 Angled

Picket Fence

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