4 7
Scanning Configuration Problems
One common problem is incorrect configuration setup. You may be trying
to read a bar code with the check digit enabled, but the bar code was
printed without it. The default settings for the reader are the most fre-
quently-used parameters. If these work, use them. That way, when
someone inadvertently changes the settings, they can be reset by
entering the return to default codes. If you must use different settings, it
is advisable to make a master sheet with the desired configuration
keystrokes in the proper order. The operator can then enter them in
sequential order to configure the reader as desired.
1. Is the bar code properly positioned on the card?
The reader is designed for a bar code centered 0.49” (12.5 mm) from the
bottom of the card.
2. Is the bar code printed in good quality (and straight)?
3. Does the bar code have a security tape or mask covering it?
If so, be sure to use a model with an infra red light source.
4. Is the proper bar code symbology enabled?
Each symbology can be individually enabled or disabled. It is sometimes
desirable to enable only those that will be used, thereby eliminating any
errors due to the operator scanning the wrong bar code symbol.
5. Do the selected bar code symbology format options match the symbol?
The scanned data from each bar code symbology can be restricted to
eliminate the scanning of unwanted symbols. The restrictions are indi-
vidually set for each symbology.
6. Is the desired track on the magnetic stripe enabled?
7. Does the output data format match the requirements of the applica-
tion software?
8. Has the magnetic stripe been encoded in a standard format?
Finally, if the reader gives the correct LED and beep indications but no
data is transmitted to the host, check the cable connection.
Keyboard Interface Problems
Installation of the reader is generally trouble free, but there are some
things to watch for if you are experiencing problems.
Do you have the proper cable?
Most modern computers and terminals use a PC/XT/AT-compatible
keyboard. However, the cable connecting it to the keyboard port may
have variations in either the signal pins or the connector itself. Make sure
that you have the proper cable for the computer/terminal with which you
are interfacing.
Does the keyboard work?
Since the data from the keyboard must pass through the reader, the
cabling connections are not correct if the keyboard is not operational.
Can the host computer accept the data fast enough?
Some computers and terminals are expecting the data rate from the
keyboard port to come in at a keystroke rate, and might not be able to
accept it as fast as the reader is transmitting. Try adjusting the
intercharacter delay to simulate the effects of keystroke delays.
Does the keyboard port supply enough power?
Most computers supply enough power to the keyboard port to operate
the reader. Occasionally you will find keyboard ports that supply only a
very limited amount of power. See if the LED is lighting at full intensity; a
lighter-than-usual green (or a red showing as orange) could indicate a
“low power” condition.
4 6