Psion Teklogix Vehicle-Mount Computer 8255, User Manual, Page: 63 / 348

Teklogix 7035, 8255 & 8260 Terminals User Manual
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Chapter 2:Assembly And Basic Operation
Scanning Techniques
• Check the bar code to make sure it is not damaged. Try scanning a different
bar code to verify that the problem is not with the bar code.
• Check that the bar code is within the proper range (see page 239).
• Does the terminal display the warning without scanning? This suggests a
hardware problem in the 7035.
The terminal can be configured to enable a function (such as <ENTER>) by
pressing the trigger twice within a time period which is measured in milliseconds.
See “Click Time” on page 133 for more details. This function is independent of the
aiming dot override described earlier in this section, under “Operation Of The
Integrated Scanner” on page 35 and only applies after a successful scan.
2.10.3 Scanning Techniques
The Scanner Angle
• Hold the scanner at an angle. Do not hold it perpendicular to the bar code.
Do not hold the scanner directly over the bar code. In this position, light can reflect
back into the scanner’s exit window and prevent a successful decode.
Scan Symbol Variations
• Scan the entire symbol. The scan beam must cross every bar and space
on the bar code, including the margins on either end of the symbol.
• Hold the scanner farther away for larger bar codes.
• Hold the scanner closer for bar codes with bars that are close together.
2.11 Infrared (IrDA) Port – 7035 Only
The IrDA port is the small red window at the top of the 7035. This port can transmit
an infrared signal to printer equipped with an IrDA adaptor. The maximum distance
between IrDA devices is 18 inches.
Important: The IrDA port is connected to the COM1 serial port UART. A
serial peripheral connected to COM1 cannot be used while the
IrDA port is active.