Motorola DS3508 Manual page 34

If necessary, the digital scanner turns on its red LEDs to illuminate the target bar code.To scan a bar code, center
the symbol in any orientation within the aiming pattern. Be sure the entire symbol is within the rectangular area
formed by the cross pattern.
1D bar code symbol
Scanning Orientation with Imager Aiming Pattern
Figure 2-5
NOTE Scanning Direct Part Mark (DPM) bar codes with the DS3508-DP20005R digital scanner: Due to the
reflective nature of some surfaces used with DPM bar codes (see
the scanner at an angle relative to the target (Motorola recommends 25-45 degrees). For example, when
scanning a 15 mil dot peen Datamatrix bar code marked on an aluminum surface with the
DS3508-DP20005R, present the target between two and three inches from the nose of the scanner, and
tilt the scanner at a 30 degree angle.
When scanning standard (non-DPM) bar codes with any configuration of the DS3508 digital scanner,
follow the standard aiming instructions described in
The digital scanner can also read a bar code presented within the aiming pattern but not centered. The top
examples in Figure 2-6 show acceptable aiming options, while the bottom examples can not be decoded.
0 1 2 3 4 5
0 1 2 3 4 5
Acceptable and Incorrect Aiming
Figure 2-6
2D bar code symbol
Aiming Pattern
Aiming on page
0 1 2 3 4 5
0 1 2 3 4 5
Scanning
2D dot peen DPM symbol
Figure 2-5), it may be necessary to tilt
2-6.
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