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Date: Mon, 9 Apr 2012 23:26:13 +0400
From: Lev Serebryakov <lev@freebsd.org>
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To: Adrian Chadd <adrian@freebsd.org>
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Cc: freebsd-wireless@freebsd.org
Subject: Re: request for testing: please test -head ath 11n stuff
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Hello, Adrian.
You wrote 9 =D0=B0=D0=BF=D1=80=D0=B5=D0=BB=D1=8F 2012 =D0=B3., 22:30:14:

> Does that fancy bit of equipment work in some kind of spectrum
> analyser mode? I wonder what _kind_ of signal you're seeing.
 It works only in spectrum analyzer mode (it doesn't know anything
about WiFi & Ko, all WiFi-related "annotating" info is extracted from
regular WiFi adapter), and it shows very limited in bandwidth (exactly
channel 6-centered 802.11g transmission, with almost no signal outside
this band) very strong (-10 -- -15 dBi) signal, when my AP was
detected as -40 dBi (when my AP is on channel 1 and transmitting, it
becomes strongest signal on this channel, so it could be easily seen
at spectorgram). This channel is occuped by 4 or 5 different hotspots
according to WiFi card, but all of them have very low RSSI.

 It think, it could be surveillance / security camera with non-WiFi
2.4 Ghs transmitter, as signal is very uniform -- when WiFi AP or
client are transmitting here are some regular spots without signal on
spectorgram and some variance in signal strength, but this signal is
very stable, without pauses or any significant variation.

 Unfortunately, I didn't take any screenshots, and this card was at my
home only for 3 hours :)

--=20
// Black Lion AKA Lev Serebryakov <lev@serebryakov.spb.ru>