NCR RealScan 7892 Bi-Modal Presentation Scanner

Chapter 4: Operating Your Scanner 4-5
Label Orientation
Scan Pattern Location
Because your RealScan 7892 produces a dense, omnidirectional scan
pattern, labels can be read from many different angles.
In order for the scanner to read a label, the center 90% of one scan line
must cross the bar code. To successfully read Code 39 and Interleaved
2 of 5 labels, the scan line must cross the entire label, not missing any of
the bars or spaces. UPC and Code 128 labels can be read by piecing
together two reads of slightly more than half of each side of the bar
code. Therefore, these labels are much easier to read and do not require
as much accuracy when presenting the label to the scanner.
Because of the large scan pattern, you do not have to be very precise
when you position the label. However, the concentration of scan lines
is greater in the center of the scan pattern. Because of this, fewer rejects
occur if you try to position the merchandise so that the label is
presented toward the center of the scan pattern.
PACESETTER
Vendors and printers occasionally supply products to the market with
bar codes overprinted, underprinted or truncated. Some bar codes
have missing margins. Others may be printed around the corners of the
packages or on media that wrinkles when picked up. PACESETTER
technology is a standard feature that helps read previously difficult-toread
bar code labels.