Re: Re: Differences in iwspy !!!

On Tue, Nov 29, 2005 at 09:35:30AM -0700, Eric Brombaugh wrote:
> buglists. The basic problem is that _every_ WLAN card manufacturer uses 
> a different metric for reporting signal & noise power. Consequently, the 
> power numbers you get from the cards are not apples/apples and need to 
> be recalibrated depending on who made them. Adding that capability to 
> the WLAN drivers is not considered critical since it doesn't have any 
> noticable effect on data traffic.

Add to this the fact that, for example, even across firmware revisions 
the signal measurement metric can change -- and this did happen in the 
prism2 line.

I didn't write the IWSPY code in linux-wlan-ng, but it seems that it 
is improperly handling signal strength reporting.

Even under the best of circumstances, these figures will never be more 
than a general "in the ballpark" value.

 - Solomon
-- 
Solomon Peachy                        [email protected]
AbsoluteValue Systems                 http://www.linux-wlan.com
721-D North Drive                     +1 (321) 259-0737  (office)
Melbourne, FL 32934                   +1 (321) 259-0286  (fax)

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