[Prism54-devel] Signal / noise level off?

[Michal Knezourek]

Hi,
Signal level is okey and the same like with use with prism card. Noise 
level is something that is normally -100 or -99 ... I don't know how 
this works, but some computing there is missing.

Michal


P.S. 2all - happy new year


Aurelien wrote:

> Hi,
> my iwconfig gives this :
> Link Quality:87/0  Signal level:-68 dBm  Noise level:-155 dBm
> 
> I don't know if this is to small... For me  it seems reasonable. Although, noise level is very unstable and can jump to -250.
> 
> Moreover, several time ago, when I added this feature to the driver, I asked if those were reasonnable values. I didn't got any answer...
> If someone has a prism2 card, or a known to work driver, it would be cool to report what typical values are...
> Last but not least, I read somewhere that the rssi field was reported in dBm. I don't remember where... and it could be a wrong source...
> 
> ...And justice for all
> 
> 
> On Wed, 31 Dec 2003 00:15:05 +0100
> Jens Maurer <Jens.Maurer@gmx.net> wrote:
> 
>>Hello!
>>
>>"iwconfig" on my card tells me the following:
>>
>>eth1      Netgear WG511  ESSID:"WLAN"
>>[...]
>>           Link Quality:153/0  Signal level:-71 dBm  Noise level:-240 dBm
>>
>>
>>It looks as if the values for the signal and noise level
>>are a little too small.
>>
>>I reviewed older e-mails that claimed that the TX power setting
>>was in 0.25 dBm units.  Probably that is the case here as well?
>>
>>That would mean that this section of prism54_update_stats_helper()
>>and its vicinity needs fixing:
>>
>>/* Noise floor.
>>  * I'm not sure if the unit is dBm.
>>  * Note : If we are not connected, this value seems to be irrevelant. */
>>
>>         MGT_GET_REQUEST_U32_NOCACHE(priv, DOT11_OID_NOISEFLOOR, &u);
>>         priv->local_iwstatistics.qual.noise = u;
>>
>>
>>Jens Maurer
> 
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-- 
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   Michal Knezourek
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