Bluetooth Class
 
Mighty Matt
Posted: 29 June 2004 11:10 PM   [ Ignore ]  
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This has just occured to me…
I have a bluetooth class 1 dongle for my desktop which works upto 100m.  I use it with my P900 for surfing the web etc when downstairs etc.  But the bluetooth in my P900 is only meant to be class 2 (10m) so how when I’m over 10m away can my desktop and phone still communicate??  :shock:

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linc
Posted: 06 July 2004 08:08 AM   [ Ignore ]   [ # 1 ]  
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Three power classes are available for bluetooth. Classes 1,2 & 3 , they have the following characteristics:

Device Power Class Max Output Power (mW) Max Output Power (dBm) Expected Range (?Obstructed Environment?)

Class 1 100mW 20dBm 100m
Class 2 2.5mW 4dBm 10m
Class 3 1mW 0dBm 10cm

A definitive definition of ranges based on power class is hard to come. Not only due to power & device differences but whether you measure open space or close office.

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