NCR
RealScan
7892 Bi-Modal Presentation Scanner Installation and Owner Guide
497-0003071 Release E
04/03
13 of 38
Label Orientation
Because your NCR RealScan 7892 produces a dense, omnidirectional scan pattern,
labels can be read from many different angles.
Scan Pattern Location
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 labels have missing margins. Others
may be printed around the corners of the packages or on media that wrinkles when
picked up. PACESETTER is a standard feature that addresses the problem of
unreadable labels.
PACESETTER Plus
trailer provides for symbol quality data being applied at the end
of UPC and EAN bar codes. This capability can be either programmed using the
programming tags or on command when using RS-232 communication program.
3 1 2 3
On
Enable Trailer
3 1 3 1
Off
Disable Trailer
Note:
Commands are presented in NCR Scanner/Scale Interface Programmer’s Guide
(BD20-1074-A)
