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1-9
About Your MK1000
Figure 1-5. Moving Scan Pattern Upward and Downward on “Tall” PDF Symbol
• The scan beam does not have to be perfectly parallel with the top and bottom of
the symbol (up to a 4
o
tilt is permitted).
• Be sure the symbol is in good condition.
Scanning Composite (2D) Bar Codes
Composite Code is a combination of a 1D symbol (RSS, UPC/EAN or UPC/EAN-128) and
a 2D symbol (CC-A, CC-B or CC-C).
When scanning a bar code:
• Keep the scan pattern parallel to the 2D symbol’s rows.
• Hold the bar code as still as possible.
• Hold the bar coded item at an angle which does not cause specular reflection (see
Specular Reflection on page 1-10).
• Hold the scanner close for small bar codes, and farther away for large bar codes.
• When using the single scan line pattern, aim the scan line at the middle of the 2D
portion. The scan pattern will open up to an optimized raster pattern and decode
both the 2D and 1D portion of the Composite Code.
Aim the single scan line at the center of
the 2D portion
Raster pattern will expand to decode
both portions