Bluetooth Class 1 - Michael, where are you ?

[dmtr]

Oh, God.

I've read about new Bluetooth USB dongle, which is really ... huh, impressive. It is rated Class 1 ( all Bluetooth handsets are rated Class 2 )

This thing handles with over 800 kbps, and has range over 100 metres. I don't know what's the transmitter, which can stay connected so far from the dongle. I think it can support 10 different devices.

Do you know anything about the Class 1 Bluetooth, guys ???

I do not, so i'll be glad to learn something.

[Michael]

The class is more or less just the signal strength/range.

Class 1 devices have an output of up to 20dBm, which is good for about 100 meters in transmission range.

Class 2 devices have a max output of 4dBm (I think), which is good for 10m. This is what most headsets and phones are. it makes sense that Class 2 devices would need less battery power to run, which is why you see them used for phones and headsets.

But a Class 1 dongle can only connect with other Class 1 devices at long ranges, because the class determines how strong a signal they transmit, not how weak a signal they can receive.

Think of it this way. You and your baby brother are trying to play a game of "catch" with a baseball.

You can throw the ball 100m, and your brother somehow manages to catch it.

Your brother, being only a small child, can't throw that far. He throws it 10m back in your direction.

You obviously can't catch it, because it never gets to you.

This is what happens when you use a 100m device with a 10m device at distances over 10m.

Admittedly, a 100m device will often have a nice antenna on it, and that might help pick up a weaker signal at distances of greater than 10m from a 10m device, but you will never get 100m of range between the two.

[dmtr]

Thanks, Michael. I was expecting another answer, but never mind. I think you are underestimating the Mobileburn Forum users :) .

[Michael]

I'm not underestimating anybody, but answering your question.

Do you know anything about the Class 1 Bluetooth, guys ???

The only difference between Class 1 and Class 2 devices is what I said - transmission strength.

If you want a different answer, you should ask a different question. I answered the only statement that had a question mark on the end - I don't know what else you were expecting....