I am experiencing unexpected signal strength values reported by an
AR9280. Basically, they always tend to be flat no matter how far or
close I am from the device that is transmitting. Roughly between the
-65 and -55dBm range on average. The exact AR9280 I am using is:
Sony UWA-BR100 802.11abgn Wireless Adapter [Atheros AR7010+AR9280]
I have compared this behavior to a bcm4322 and the behavior I see with
the bcm4322 is as expected. Far away I get low signal strength
values, and close to the device I get high signal strength values
(-20dBm).
Here is a comparison of the two (taken at the same time) as I walk
closer to the transmitter. I record the signal strength from
wireshark using radiotap header field radiotap.dbm_antsignal.
http://www.flickr.com/photos/gnychis/7203437510/in/photostream
Surprisingly, the average signal strength seems to decrease with the
ar9280 as I get closer, yet remains relatively flat. The bcm4322
shows a clear increasing trend as I get closer.
Does anyone have any insight as to what might be going on? I'm using
the most recent firmware and compat-wireless as of May 14, 2012.
Thanks!
George
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
