C001537_04_CR2 User Manual - 4
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To read a symbol with the CR2:
1. The CR2 features omnidirectional decoding. Center the symbol in any orientation within
the laser dot aiming pattern (figure 1.3).
Note: The CR2 can read a symbol that is not centered however, the CR2 performs best
when a code is centered. If two (2) bar codes are with the imagers decode zone, the CR2
will decode the symbol closest to the center of the aiming dot.
2. The CR2 was developed to decode both very small 2-dimensional symbols and larger
1-dimensional symbols. The unit features two imagers to create an innovative dual
decode zone. The CR2 features a high speed processor and DECODES BOTH
ZONES SIMULTANEOUSLY. The unit has one imager focused on a near-field for
smaller codes (optimal focal point is 4 inches) and one imager focused on a far-field
for larger codes (optimal focal point 9 inches). To read smaller symbols move the CR2
closer to the symbol. To read larger symbols move the unit farther away from the
symbol (see figure 1.4). The entire CR2 decode zone varies between two (2”) and
twenty (20+”) or more inches.
3. Hold the CR2 still - DO NOT SWIPE OR MOVE THE READER. Press the
trigger until the CR2 beeps, indicating the code has been successfully decoded.
4. The reader may be optimized to your specific environment by scanning codes in Chapter 3.
1.3 - Targeting and Reading Techniques (con’t)
Figure 1.3
1.4 - Imager Field of View & Resolution
The CR2’s dual field optical system may be modified based on your scanning environment. The
CR2’s megapixel imager may be set to the following two modes:
SXGA Mode: In standard SXGA mode (default), the 1.3 Million Pixel imager is divided into near field
and far field decode zones. In each zone the resolution is 1024 x 640 pixels (see figure 1.4). In this
mode of operation the reader utilizes the highest resolution creating the widest working range on
bar code and 2-dimensional symbols of all densities. The trade-off is the amount of time the reader
spends processing the image. This time can be reduced by optimization functions:
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