Hi!

* On 11.12.2014, 17:14 Christophe Prévotaux wrote:
> Sometimes it seems the ath9k series chips (at least some of them ) do not 
> report RSSI for some frames, is this a known chip glitch ?

I don't know if it is a chip glitch, but I can confirm the observation. I have 
a 
dataset of 2.05 billion frames received with AR9280 cards in monitor mode. I 
used ath9k from OpenWRT 12.09 (kernel 3.3.8).

Out of these frames, about 2% do not carry signal/noise information. Also, for 
about 0.4% of all frames a signal level of 0dBm or above is reported, which is 
unlikely to be correct.

Best regards
Till

-- 
Dipl.-Inf. Till Wollenberg
University of Rostock, Faculty of CS and EE
Institute of Computer Science
18055 Rostock, Germany
Tel.: +49 (0)381 498-7507

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