Reason for GPS problems found!

Bumbl bumbl3x3 at
Tue Jul 15 14:56:25 CEST 2008

I can give confirmation too.
Without microSD card I got a fix in 53s.
With the microSD card I neither got a fix nor even got a single 
satellite to show up although I tried it at different locations (even on 
the highest point nearby with hardly any buildings and good weather 

thomasg wrote:
> Hi ppl,
> I write this to community, not to devel or owners because everyone should
> know:
> *sbeh*, one of the people in #neo1973-germany IRC-channel found the reason
> for the GPS problems.
> The problem only occurs if a SD card is set in. Doesn't matter if it's
> mounted or in use, it just has to sit in the socket.
> The TTFF went from no fix at all to TTFF 120 seconds indoor(!!!), and about
> 40 seconds outdoor.
> Two other people could verify this with about the same results.
> We'll do more tests later, but for now we surely know what's causing the
> problem (and it seems to be a EMC problem).
> First results show at the same devices, even outdoor, that there is no fix
> in over 400 seconds with SD card, the signal seems to be at least 10 to 20
> dB worse (so bad, that most satellites don't even appear).
> Testresults from other people appreciated.
> thomasg
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