NCR RealPOS, Руководство пользователя

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4-8 Chapter 4: Operating the Scanner
PACESETTER III
The PACESETTER III feature of the 7893 scanner performs many functions that improve the
efficiency of the scanner. It determines what is wrong with a bar code and then fixes it. It also
keeps track of problems found.
PACESETTER III also detects, corrects, and reports errors discovered in UPC Number System
Two and Number System Four labels. These two label types are printed in the store and
account for a significant number of unreadable labels due to failures of the in–store printing
mechanism. PACESETTER III looks for errors in these labels and learns from each attempted
scan. After seeing a particular printing error a number of times, PACESETTER III may
determine that an error is present in the label and that the error may be correctable. If the
correction capability of PACESETTER III is enabled, the scanner attempts an error–free
correction of the label and passes the results to the host terminal. Whenever an error–free
correction is not possible, PACESETTER III does not pass label data to the host terminal.
Read Indicators
The 7893 provides two methods of indicating valid reads: LED Status Indicator (visual) and
Audible Tone (audio). The LED Status Indicator is always enabled; however, you can disable
the Audible Tone.
LED Status Indicator
The LED Status Indicator light is located above the speaker. When the 7893 detects bar code
data, the laser turns on and the LED Status Indicator turns GREEN. When an accurate read of a
valid bar code occurs, the LED Status Indicator turns from GREEN to GREEN until the bar
code is removed; it then turns GREEN again.
When using IBM 468x communications, the LED Status Indicator flashes PINK (group of nine
flashes repeated at 3-second intervals) when the 7893 is offline. This can be caused if the IBM
host terminal has not established communications with the 7893, the host terminal is not turned
on, or the interface cable is not connected.
Audible Indicator
You can program a "Good Read" tone that indicates the scanner's ability to accurately read bar
codes. This permits you to identify good reads without having to observe the LED Status
Indicator. No tone is generated if the scanner does not detect a valid bar code.
You can enable or disable the Good Read Tone. If the Good Read Tone is enabled, you can
also specify its volume and duration. Details for programming the Good Read Tone are in
Chapter 5,
Programming . The 7893 scanner comes with the Good Read Tone enabled.
Speech Functionality
The 7893 has the ability for speech. If speech is enabled the unit will speak during
programming, during diagnostics, and when the unit encounters an error.