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jh67 Posts: > 500

As the bluetooth devices seems to be more and more common,..I guess it would be a good idea to tell a bit more about it

And also this will probably help newcomers in Bluetooth to understand it a bit better

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Bluetooth Chipset consists of :

radio
baseband controller
flash memory
crystal reference regulator

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OPERATES WITHIN : 2.4 to 2.8 GHz Industrial Science Medical Band (ISM).

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RF-OUTPUT: Spread spectrum, full duplex signal that hops among 79 frequencies at 1 MHz intervals, at up to 1600 hops pr.second to avoid interference.

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POWER-REQUIREMENTS: Standbymode: 0.3mA.
during data transfer: 30mA.

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CONNECTING SPEED: up to 1 Mbit/s.

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Bluetooth versions : 1.0 og 1.1.

Version 1.1 : built-in interoperability with wap, particularly on the server side. All devices should be able to reconize and transmit client and server details with wap-gateways.

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Bluetooth version: 1.2

This version is backward compatible with 1.1 and the major enhancements include the following:----------------------------------

Bluetooth version: 2.0

Bluetooth version 2.0 + EDR delivers data transfer rates up to three times faster than the original Bluetooth specification. Bluetooth version 2.0 + EDR also provides enhanced multiple-connectivity. With Bluetooth 2.0 + EDR, users will be able to more efficiently run multiple Bluetooth devices at the same time. As a result, Bluetooth Personal-Area Networks (PAN) or Piconets will become more common.

Here is a listing of the main enhancements/features you will find with Bluetooth Specification Version 2.0 + EDR:----------------------------------

Car companies like Ford are working with IBM, developing "in-car" bluetooth applications...e.g. voice-activated email functions.

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Bluetooth and WI-FI (IEEE 802.11b) are both using 2.4 GHz frequencies.
Some see them as compeditors,..but really, they are not that.

Bluetooth is PAN (personal Area Network).
And designed for connecting devices, for synchronization and data transfer.

Its not designed for connecting to a network, meaning Bluetooth is WHAT you connect to,..not HOW you connect.

Unless of course, bluetooth replaces cables/IR between phone and laptop/pda.
Then it could get you online or into a network.

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BLUETOOTH PROFILES AND PHONES :

There're 14 different bluetooth-profiles, that are approved by Bluetooth Special Interest Group (SIG).
Most bluetooth-devices will support only 1 or 2 profiles.

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A bluetooth phone have an audio-profile for headset, and a data-profile for connecting to e.g. pda/laptop.

The bluetooth-headset usually have one profile- the audio.
BUT when headsets are upgradeable with new software, new profiles can be added.

E.G. : Listening to Streaming Digital Media.

Others could push alerts and relevant information to e.g. pda, or automatically exchange businesscards, without exposing other files.

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Hope this will help in some way, to understand more about how Bluetooth works.


Jan

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[ This Message was edited by: laffen on 2004-10-28 13:45 ]
[ This Message was edited by: tranced on 2009-06-23 04:19 ]

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Posted: 2002-02-13 16:01:00
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arroyootje Posts: > 500

Thanks again Jan!


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Posted: 2002-02-13 17:55:00
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jh67 Posts: > 500

arroyootje : your welcome

Jan



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Posted: 2002-02-13 18:34:00
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all8 Posts: 372

Any idea where the bluetooth antennas mounted in both HBH-10 and T68?

Each time I point the screen of t68 with the body of HBH-10, I can get good connection???
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Posted: 2002-03-02 03:55:00
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cruiser91 Posts: 31

What I would like to know is if the bluetooth chipset has its own little antenna inside, or does it make use of the phone's aerial?

Dying of curiousity here.


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Posted: 2002-03-02 10:47:00
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jh67 Posts: > 500

On the HBH-10 the antenna is in the black front-piece with the ericsson logo (the black piece that points forward), that sticks out.

In some bluetooth-devices the antenna is internal, like e.g. the bluespoon-headset or the anycom bluetooth card.

In the Anycom bluetooth card the blue outer part of the card holds the antenna. This part is out in the open, when the card is inserted into the laptop.

Jan


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Posted: 2002-03-02 14:13:00
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jh67 Posts: > 500

The bluetooth module itself, consists of the following :

radio module (13 Mhz xstal)
Vreg
flash memory
voice codec. this is optional.
The baseband link management and control consists of :
microcontroller core
Sram
bluetooth core
Uart,pcm usb interfaces.

This is the bluetooth chipset.

I know this is "tech-stuff", but should give a pretty good idea, of whats inside

Jan

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Posted: 2002-03-02 14:31:00
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cruiser91 Posts: 31

So where is the bluetooth antenna in the T39m?

Does it have its own little secret internal antenna or does it make use of the phone's antenna?

Hope it is the phone's antenna.......
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Posted: 2002-03-02 16:13:00
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orang3 Posts: > 500

how about the HBH 15 ?
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Posted: 2002-04-21 09:08:00
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tobi Posts: 8

could i use a bluetooth pc card to download background pictures...
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Posted: 2002-04-21 09:37:00
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