Date: Thu, 23 Aug 2012 00:07:01 -0700 From: Adrian Chadd <adrian@freebsd.org> To: "Wright, Brett" <Brett.Wright@cooperindustries.com> Cc: freebsd-wireless@freebsd.org, Kim Culhan <w8hdkim@gmail.com> Subject: Re: Atheros DFS radar detection Message-ID: <CAJ-Vmo=6HLXxYLG3u-oAndR66wtnSySYm5Rp7Jp5T6eyiPq7UQ@mail.gmail.com> In-Reply-To: <475A4E02EFF4724A9E58F55A56AC13160661F137@APEVS1.ap.ci.root> References: <CAKZxVQU-%2BW9AP4a9W0PGyLmBOa1GVOrGcLC8bp5zW_=K%2Bv3tHA@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160641D618@APEVS1.ap.ci.root> <CAKZxVQWeOnw_kZWzuXfHSS-ssQfGVG=ybYK%2B%2B8EaqnFVe-rLpg@mail.gmail.com> <CAJ-Vmon=NfyZW9vJRSNxTLZvJhobeCP-S1O3TxopNzArWunCCQ@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160661E6AC@APEVS1.ap.ci.root> <CAJ-VmomJZD_NBM8=N1oD1a0XCFLoXoezStXHKLKCSGLBFrKT2Q@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160661F137@APEVS1.ap.ci.root>
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On 22 August 2012 18:09, Wright, Brett <Brett.Wright@cooperindustries.com> wrote: > They appear to have no duration. I only get them while transferring data > (iperf). Right. What happens when you adjust prssi by itself then? >> It also means if the NF value is higher for some >> reason, the RSSI values will change and the parameters will also >> change. > Actually the noise floor seems to be settling around -87dBm on these > cards... Right. That's going to lower the RSSI values that the hardware reports/sees and muck things up a bit. Either there's a spur somewhere, the boards are noisy, or there's some external amplifier attached on the input side. I'll ask one of the baseband guys tomorrow and see what they think. This is a really old chip though. They may not remember. :-) Adrian
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