Reason for GPS problems found!

Marcus Bauer marcus.bauer at
Tue Jul 15 13:35:54 CEST 2008

Confirming this too. Under decent conditions first TTFF 130s, then after
a power down/power up it was ~40secs. Never saw it that fast on the
Neo1973. Excellent! Well, more or less :o)

On Tue, 2008-07-15 at 12:42 +0200, 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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