ACNet Search

Results for: Radio Frequency Body Sculpting in San Antonio

Bluetooth Operation

The networking standards of Bluetooth will transmitdata via low power radio frequency. Bluetoothcommunicates on a 2.45 GHz frequency. This veryband of frequency has been set aside by internationalagreement for the use of industrial and medicaldevices.

Many devices that you already known and use takeadvantage of this frequency band. Garage dooropeners, baby monitors, and the next generation ofmobile phones all use this frequency within the ISMband. Ensuring that Bluetooth and the other devices don't interfere with each other is a crucialpart of the design process.

One of the ways Bluetooth will avoid interferingwith other electronic devices is by sending out weak signals of around 1 mw. In comparison, eventhe most powerful of cell phones can transmit a signal of 3 watts.

The low power signals will limit the range of a Bluetooth device to around 32 feet, which cut thechances of interference between your computer andother electronic devices. Even though it has lowpower, Bluetooth doesn't require a line of sightbetween the communicating devices. The walls inyour home won't stop the signal, making it greatfor rooms throughout the house.

Bluetooth can connect 8 devices at the same time.With each of those devices on the same radius,you may think they would interfere with eachother, although it's very unlikely. Bluetoothutilizes a technique known as low frequencyhopping, which makes it harder for more thanone device to transmit on the same frequencyat the same time.

With this technique, a device will use 79individual, randomly chosen frequencies withina designated range, which change from one anotheron a regular basis.

In the case of Bluetooth, the transmitters willchange frequency 1,600 times or more every second, meaning that more devices can make fulluse of the radio spectrum. Since everytransmitter of Bluetooth will use spread spectrumautomatically, it's very unlikely that two transmitters will be on the same frequency at theexact same time.

When the Bluetooth devices come within close rangeof each other, an electronic conversation willoccur to determine whether or not they have data to share or whether one needs to take totalcontrol. The user doesn't have any buttons topress or commands to give - as the conversationwill occur automatically.

Once the conversation has occured, the deviceswill form a network. Bluetooth devices willcreate a PAN (Personal Area Network) or piconetthat may fill a room. Once the piconet has beenestablished, the devices will randomly hop infrequencies.

(word count 427)

PPPPP