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Date: Tue, 28 Jul 2015 10:25:04 -0700
Message-ID: <CAJ-Vmokfovc806T+Ja6nQhbGUDM=uU7MmKwad6Uc2hNYV+DDtA@mail.gmail.com> (sfid-20150728_192510_048176_F10082E3)
Subject: Re: [PATCH RESEND] ath9k: Fix NF CCA limits for AR9287 and AR9227
From: Adrian Chadd <adrian@freebsd.org>
To: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: ath9k-devel <ath9k-devel@lists.ath9k.org>,
	ath9k-devel <ath9k-devel@qca.qualcomm.com>,
	Felix Fietkau <nbd@openwrt.org>,
	John Linville <linville@tuxdriver.com>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
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Sender: linux-wireless-owner@vger.kernel.org

So the values aren't "bad" on the 1043nd - they're in 1/2 or 1/4dB,
but there's no scalar quantity (ie, it's not in dBm.) The 1043nd
calibrates down to around -95 or so, which "sounds" like it's in dBm
but it isn't, and any similarity is just coincidence.

It does sound like your AR9227 sees noise. can you fire up the
spectral analysis stuff to plot what the NIC is seeing? (yes, the
AR9287/AR9227 has spectral analysis mode, same as the AR9280, AR9285,
and >= AR9300.)


-adrian