About Combining Scanning with Bluetooth The Cordless Hand Scanner represents an optimal combination of proven
laser bar code scanning technology and state-of-the-art Bluetooth
connectivity. Because of the problems inherent in the intermittent storage of
scanned data in on-board memory if the Bluetooth connection is lost, the
CHS is designed to operate only when connected to the host, with the
powerful Class 1 radio providing the maximum possible connection range.
The user is advised of the connection status with a single beep when the
CHS connects to the host and a double beep when the connection is closed
or lost. As with any wireless device, connectivity range can be affected by a
variety of environmental variables.
The most likely source of errors in any cordless scanning system is not in
the scanning and decoding process, but in the transmission of the data to the
host. For this reason, the beeper and green LED signals provided by the
CHS confirm not only a successful scan but also the successful
transmission of the scanned data to the host. Users familiar with bar code
scanning may notice a slight delay between the successful scan and shut off
of the laser and the beep and green LED from the CHS confirming
completed transmission of the data. In most instances, this delay is less than
300 ms (milliseconds), but may be slightly longer as the connectivity range
limit is approached.
Because of the two-way transmission verification process, it is
possible to cause communication problems by scanning bar
codes as fast as possible. When this occurs, all transmissions
will stop for several seconds before scanning can be resumed. To
prevent this from happening, the user should wait until the
confirming beep is received before scanning the next bar code.
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