[Prism54-devel] Signal / noise level off?

[Aurelien]

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