Re: ath9k microwave anomaly

From: Justin P. Mattock
Date: Sat Jan 03 2009 - 03:11:31 EST


Willy Tarreau wrote:
On Fri, Jan 02, 2009 at 10:48:29PM -0600, Robert Hancock wrote:
Justin P. Mattock wrote:
Steven Noonan wrote:
On Fri, Jan 2, 2009 at 7:31 PM, Justin P. Mattock
<justinmattock@xxxxxxxxx> wrote:

Dave Jones wrote:
On Fri, Jan 02, 2009 at 06:47:32PM -0800, Justin P. Mattock wrote:
Now I'm not trying to be funny,
but I think I figured a problem
with running ath9k, and having the internet
timeout.(for me at least);
When streaming T.V.(cspan2), and
streaming music(somafm), at the same time,
then using the microwave, I'll experience a blackout
of internet(T.V. stops, then music stops streaming);
not specific to ath9k.

http://blogs.zdnet.com/Ou/?p=578 has some pretty graphics
to show just how much noise a microwave puts into the part
of the spectrum wifi uses.

Dave


Damn that's allot,
no wonder I was having these timeouts.
i.g. system streams fine for 10 hours.
then the next day a timeout after 2 hours due
to microwave use.
Thanks for pointing that blog out.
that opened my eyes up to how powerful
a microwave is. makes me wonder if that
grade in the window actually does what is supposed to.
(block gamma rays or whatever the dangerous wave is);

regards;

Justin P. Mattock

Yeah, I think it was Luis Rodriguez (from Atheros) who told me that a
microwave was the best way to make a signal "wet poop" for
interference testing.

Well, this one here seems to be not
that old, but it's enough to cause
interference. Hopefully not too old
to cause me to go sterile!!
interesting thing is when
the microwave is cold and then started
I noticed more interference, as to when
it's been running for a while.
I think the standards for microwaves allow a reasonable amount of microwave leakage - still way below the levels that can harm you, but compared to the power levels that a WiFi device puts out, it's pretty significant..

BTW, having any WiFi stopping working at 30 feet around a microwave oven
makes me think that beast is leaking like mad. I've already ran experiences
with mine in the past, and it could only slightly perturbate the traffic
within one meter (3 ft) which I already considered huge. You may want to
try to put some aluminium foil on the front door, it is possible that the
protection grid is damaged or not properly sealed.

Willy

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great!!
(should I build a cement barrier?);
I had timeouts like this with the wireless phone
(then went out a bought an encrypted phone for this purpose);
now the microwave is causing the same issue.(silently though);
like what I had mentioned, the microwave causes this when
it's cold started, making wonder if the waves are better handled
when the metal or grate is warm as opposed to cold.
(molecules are jumping around as opposed to moving around);
in any case as long as that microwave isn't active the internet
connection seems O.K.(knock on wood);

regards;

Justin P. Mattock
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