Reason for GPS problems found!

Alexey Feldgendler alexey at
Wed Jul 16 09:33:46 CEST 2008

On Tue, 15 Jul 2008 22:41:44 +0200, ian douglas  
<ian.douglas at> wrote:

>>> The note attached said:
>>> "GPS internal antenna issue appears to respond positively to cranking
>>> RF_3V to 3.6V from 3.0V."

>> it is a SNR issue for sure, and to boost SNR you either
>> boost signal (which is what voltage raise does) or you reduce noise
>> (which what removal of SD card seems to be doing).

> Andy submitted another patch within the last day or so that toyed with
> the voltage levels of the SD circuitry, but his notes indicate that it's
> more to do with data stability than noise/interference with the GPS unit.

I'd love to test with that patch. Is it in a daily build?

Alexey Feldgendler <alexey at>
[ICQ: 115226275]

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