GSM-noise "buzz" issue / ways forward

Andy Green andy at openmoko.com
Mon Sep 22 18:50:13 CEST 2008


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Somebody in the thread at some point said:

| and *then* continue to look for good fixes for already existing ones,
this
| request gets torn down by an immediate vivid discussion about
contamination
| pathes etc., leaving impression to TPE EE we are not on same page
about doing
| new PCB to include EMI-filters on 3 contacts of JK4401.

If we're making an A8 today we should add them, solely on the basis
that's the only thing we found that affects it at all.  But, I don't
think we make an A8 today.

What we need to increase our understanding of the whole problem if we
can in the meanwhile and see if we can find more attacks elsewhere and a
different way to come at it.  That is why the difficult question about
paths keeps returning.  Really the bead impact is clue to the larger
problem structure, not a solution in itself (although if we don't get
any further, that's all we have to play with).

- -Andy
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