NCR RealPOS, User Manual

Page: 17 / 187

Chapter 1:
Introduction
The new NCR RealPOS Presentation Scanner (7893) represents the latest technology in laser
scanning. It features bi-optic electronics, including dual video, flash download technology, and
flash programmability. It is a small, compact unit that weighs about 14 ounces. Being a
presentation scanner, it permits you to present the bar code label to the scanner or pass it by for
bar code reading.
Power for the 7893 is provided either by a powered USB cable or powered RS-232 cable, if
available from the host terminal, or through a +12Vdc wall adapter Power Module. The input
voltage to the NCR 7893 must be +12Vdc.
Using the Scanner
Although the 7893 is very simple to use, it is quite a complex electronic device. It contains a
laser module that generates a low-level laser light. The laser light passes through a series of
mirrors to generate a scan pattern. Reflected light from the bar code is collected and decoded to
determine the bar code data. The scanner then sends the information to the host terminal or
personal computer (PC).
The 7893 produces an omni-directional scan pattern that makes scanning easier. The pattern
looks like several lines are scanning simultaneously, but is actually just a single beam reflected
through several mirrors. It is this pattern that enables the scanner to read bar codes from most
orientations.
This scanner meets the flexible mounting and use requirements for both hands-free and hand-
held scanning. The 20 line scan pattern is designed to handle the aspect ratio tags commonly
found in the general merchandise environment, with no orientation required. The large area
covered by the pattern makes presentation scanning easy. The scan pattern is designed such
that all lines expand in length and separation equally through space. The versatility of the scan
pattern results in effective presentation and pass-by scanning. The scan pattern consists of 5
angular sets of 4 scan lines.
There may be times when the merchandise is too large to be presented to the scanner. In these
cases, you can pick up the scanner and move it to the merchandise. Because the scanner is very
light, you can maneuver it easily in these circumstances.
The 7893 does not have an On/Off switch. If you present a label to the scanner when it is idle,
it detects the label and turns on. This occurs with minimal delay in reading the label. After
several minutes of not detecting a valid bar code, the laser (programmable 5-30 minutes) shuts
off.
1