Motorola MK3100 Product Reference Manual page 21

The MK3100 can also decode with the aiming dot on a symbol but not centered. The top examples in
Figure 1-5 show acceptable aiming options, while the bottom examples may not decode.
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Acceptable and Incorrect Aiming
Figure 1-5
The aiming dot is smaller when the symbol is closer to the MK3100 and larger when it is farther away. Scan
symbols with smaller bars or elements (mil size) closer to the MK3100, and those with larger bars or elements
(mil size) farther from the MK3100.
MK3100 Introduction
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