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From: Joerg Reisenweber &lt;joerg@openmoko.org&gt;
To: Andy Green &lt;andy@openmoko.com&gt;
Date: Wed, 6 Aug 2008 02:48:33 +0800
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Subject: Re: Buzzing sound
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Am Mi  6. August 2008 schrieb Andy Green:
&gt; I didn't really get to believe it is specifically radiated RF coupling
&gt; yet, it can still be RF conducted via PSU.  Just something to bear in min=
d.

Ok, we can not exclude this. Actually it's quite possible. Anyway we need a=
=20
decent test under controlled environment (analyze exact level of noise in d=
B,=20
at a known PCL), then we easily could tell. There are reports that connecti=
ng=20
an external antenna stopped the noise completely, which would give a cue in=
=20
direction radiated RF coupling. Alas nobody approached the external antenna=
=20
to the GTA02 to test whether noise starts with this procedure. Also the=20
absence of noise with ext ant could be a result of better antenna gain=20
leading to BS leveling down PCL.
You see there are a lot of tests, some of them rather simple, most of them =
not=20
even clear wrt their setup, that all need to be done until I leave next wee=
k.

cheers
jOERG


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