Zebra QL 320 Manuel d'utilisateur télécharger pdf (Page 23)

QL 320 User’s Guide 23

Bluetooth™ Networking Overview

Exposure to Radio Frequency Radiation

The radiated output power of this internal wireless

radio is far below the FCC radio frequency exposure

limits. Nevertheless, this Bluetooth radio must be used

in such a manner that the antenna is 2.5 cm or further

from the human body.

The radio and antenna are mounted internally in this

printer in such a way that, when the printer is used in a

standard configuration (belt clip, soft case, shoulder

strap), the 2.5 cm distance from the users body will be

met. Do not use the printer in an unauthorized manner.

The internal wireless radio operates within guidelines

found in radio frequency safety standards and

recommendations. The level of energy emitted is far

less than the electromagnetic energy emitted by

wireless devices such as mobile phones.

“Bluetooth” is a worldwide standard for the exchange of data be-

tween two devices via radio frequencies. Bluetooth radios are rel-

atively low powered to help prevent interference with other

devices running at similar radio frequencies. This limits the range

of a Bluetooth device to about 10 meters (about 32 feet).

In order to exchange data, two Bluetooth enabled devices must

establish a connection. Bluetooth software is always running in

the background, ready to respond to connection requests. One

device (known as the

master

or the

client)

must request a connec-

tion with another. The second device (the

slave

or the

server

)

then accepts or rejects the connection. A Bluetooth enabled QL

320 will normally act as a slave, but in theory any Bluetooth de-

vice can be either a master or a slave. This miniature network is

sometimes referred to as a “piconet” and can consist of several

Bluetooth enabled devices.

Each Bluetooth QL 320 has a unique Bluetooth Device Address

(BDA) loaded into its Quick Link module when manufactured.

A Typical Bluetooth Connection Sequence

In this simplified sequence “Joe’s Terminal” is a Bluetooth ready

hand held terminal running an application that needs access to a

printer.

1. Joe’s Terminal performs a search of its “piconet” (a Device In-

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Zebra QL 320 Manuel d'utilisateur Page 23

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