Re: [Wifiadmin-users] Noise and Silence values

[Rob F. <ro...@no...>]

On Jun 23, 2005, at 1:38 PM, Christopher Ness wrote:

> Why would we subtract 256 from the noise and silence values  
> gathered in
> get_assoc() ?
>
> Was this to make up for a bug in hostap or the firmware?  Without
> subtracting my values look more appropriate - like iwconfig reports  
> them
> at -43 and -92 respectfully.
>
> Sorry to flood the list, is anyone else out there too?

The noise and signal values are completely arbitrary, and vary from  
driver to driver.  I don't know of any reliable way to know if you  
have received good values from what the kernel reports.  You have to  
subtract 256 from Cisco cards, but not Prism cards (for example).

--Rob