Local Navigator Bluetooth Base Station
lesswire AG
Page 3
1. Introduction
1.1
Functionality
The product described herein is a LAN Access Point with a Bluetooth interface. To
operate this device, an Ethernet (IEEE 802.3 with 10/100 Base TX) interface
connected via a RJ45 plug is needed. Power is supplied via an external 6V/500mA
power supply which is included in this package.
The Local Navigator Bluetooth Base Station is used to connect an intelligent wireless
device, like a Notebook or a PDA, to an existing LAN via a radio interface. This is in
order to connect a wireless device with a Bluetooth card to, e.g. access the Internet,
transfer files or use printers.
Image 1.1 – The Local Navigator Bluetooth Base Station
The new radio interface standard called Bluetooth is dedicated to supply the cost and
power efficient installation of high-performance radio networks. The standard is
defined in a way, that it can be used worldwide without any country-specific
adaptations. The used radio frequencies are in the license-free ISM band, which is
defined to be between 2.4 and 2.5 GHz. The radio transmission power (Class 3: 1
mW) is several orders of magnitude lower than that of GSM mobile phones.
Bluetooth can therefore be used also in sensible areas with regard to radio
transmission in general, e.g medical areas. To achieve a good resistance against
radio disturbances, the transmission is spread over a radio spectrum. The frequency
used for transmission is changed 1.600 times per second. 79 different radio
frequencies are available in total. Some single frequencies which are disturbed, have
nearly no impact on the overall tranmission characteristics.
