Symbol Technologies DS 3408 - Manual (Page 31)

Scanning 2-7
6. Hold the trigger until the digital scanner beeps, indicating the bar code is successfully decoded. For more information on
beeper and LED definitions, see
Table 2-1 and Table 2-2 .
This process usually occurs instantaneously. Steps 2 - 4 are repeated on poor quality or difficult bar codes, until the bar code is
decoded, the trigger is released, or the Decode Session Timeout is reached.
Aiming
Hold the digital scanner between two and nine inches (depending on symbol density; see Decode Zones on page 2-9 ) from the symbol,
centering the aiming pattern cross hairs on the symbol.
The aiming pattern is smaller when the digital scanner is closer to the symbol and larger when it is farther from the symbol. Scan
symbols with smaller bars or elements (mil size) closer to the digital scanner, and those with larger bars or elements (mil size) farther
from the digital scanner.
The digital scanner can also read a bar code presented within the aiming pattern but not centered. The top examples in Figure 2-5
show acceptable aiming options, while the bottom examples can not be decoded.
Figure 2-5. Acceptable and Incorrect Aiming
0 1 2 3 4 5
0 1 2 3 4 5
0 1 2 3 4 5
0 1 2 3 4 5