Rockwell Automation 2755 2D Hand-Held Scanner - Manual (Page 16)

Scanner Features 1–5
Publication 2755-6.4
Smart Raster
The scanner has a programmable smart raster capability, which
causes the scanner to emit a raster pattern dynamically adjusted to
the height of a 2-D (PDF417) bar code. To increase scanning
efficiency and decrease decode time, the scanner determines the
height of the bar code and then opens the scan pattern to a size
optimal for decoding the bar code.
In normal smart raster operation, a trigger pull causes a slab raster
pattern to appear. If the target is a 1-D bar code, the pattern never
opens beyond a slab raster.
If the target bar code is a 2-D (PDF417) bar code, the scanning
pattern opens to a full, optimized raster pattern when the scanner is
poperly aligned over the bar code.
The scanner operates with a smart raster capability unless
programmed otherwise.
Aiming Dot Pattern
Slab Raster Pattern
Open Raster Pattern