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Date:      Wed, 06 Dec 2000 11:33:15 -0700
From:      Warner Losh <imp@village.org>
To:        nate@yogotech.com (Nate Williams)
Cc:        Christopher Yeoh <cyeoh@linuxcare.com.au>, Greg Lehey <grog@lemis.com>, Wesley Morgan <morganw@chemicals.tacorp.com>, mobile@FreeBSD.ORG
Subject:   Re: ray committed 
Message-ID:  <200012061833.LAA80006@harmony.village.org>
In-Reply-To: Your message of "Wed, 06 Dec 2000 10:53:06 MST." <14894.32002.562845.683899@nomad.yogotech.com> 
References:  <14894.32002.562845.683899@nomad.yogotech.com>  <14893.53324.616401.949125@rockhopper.linuxcare.com.au> <20001206152332.A21187@wantadilla.lemis.com> <Pine.BSF.4.21.0011122152410.34677-100000@volatile.chemicals.tacorp.com> <200011130313.UAA03395@harmony.village.org> <200012060509.WAA75737@harmony.village.org> <20001206154244.J20481@wantadilla.lemis.com> <200012060604.XAA76044@harmony.village.org> 

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In message <14894.32002.562845.683899@nomad.yogotech.com> Nate Williams writes:
: Are these radios 'Air' compatible with one another?  If not, one may be
: using Spread Spectrum, and the other Frequency Hopping.

They should be.  They are the same cards.  Both WebGear Aviator cards,
same revision, same box.

: In my experience, the old 'non-802.11' cards seem to be less effected by
: noise than the newer cards, FWIW.

That's good to know.  We were thinking of upgrading the radios...

: Finally, multi-path can really screw you up when you get the radios
: close to one another.  In our product, we have to use attenuators to get
: decent performance when the radios are close to one another.

You may be right.  We have problems getting the radio to work at a
height of less than 10' above the roof (antenna ht).  I'm about 30-40'
below the antenna with these cards.  The antennas are highly
directional dishes.  Might be a problem, but wouldn't explain why when
I turned both ends off I still have problems with the aviators.  I
kinda think it is "enemy action" given the random nature of it.

Warner


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