GPS

Bumbl bumbl3x3 at gmail.com
Fri Jul 11 23:57:19 CEST 2008


Be happy
I have never got a fix up to now although trying on different locations 
for >45min each.
I'll consider to use my waranty.

Russell Sears wrote:
> I'm in the san francisco bay area, and am seeing very slow GPS fixes. 
> It took 5 minutes to get the time code from the satellite this morning 
> (didn't get a fix in 12 minutes...), and I've only gotten a fix once so 
> far (after > 10 minutes...), and it's failed to get a fix during a few 
> ~10 minutes walks outdoors.  I've been carrying the phone screen up, 
> away from my body, away from buildings taller than a story or two...
>
> Anyway, if you still haven't duplicated the problem, let me know.
>
> Also, I'm getting a bit of GSM data noise on my speaker during phone 
> calls.  Is that normal, or is it unexpected signal leakage?  I plan to 
> retest GPS with the GSM (and all other radios) disabled.
>
> -Rusty
>
> steve wrote:
>   
>> Well,
>>
>>    Sean is sick in bed from taking Malaria shots since he is traveling to
>> Ghana to speak. I have been
>>    Busy at the wharehouse and Wolfgang is aware of your issue and we have
>> folks on it trying to duplicate
>>    the issue and figure it out. Sean, for example, has had no issues in TPE,
>> west coast USA, east coast USA,
>>    and columbia with his phone.  So, after we duplicate the problem then we
>> can figure the cause. Software,
>>    component failure, test leakage.
>>
>>    On the inside of your phone there is a datecode, serial number etc.
>> Email that to wolfgang
>>
>> Steve  
>>
>> -----Original Message-----
>> From: Marcus Bauer [mailto:marcus.bauer at gmail.com] 
>> Sent: Monday, July 07, 2008 10:05 AM
>> To: List for Openmoko community discussion
>> Cc: Sean Moss-Pultz; Wolfgang Spraul; steve
>> Subject: Re: GPS
>>
>> On Mon, 2008-07-07 at 18:24 +0200, Mathias Ballner wrote:
>>     
>>> hi all,
>>> today i tried to get the gps running, but i didn't get a gps fix i 
>>> tested it with tangogps (nice tool!) and openmoko-agpsui the only 
>>> output i got was:
>>>       
>>> http://scap.linuxtogo.org/files/6d11990f0c82d92f0252742d7ef44950.png
>>> what do i do wrong?
>>> mathias
>>>       
>> It seems nobody gets a quick fix. Times range from 10 to 60 minutes if any
>> fix at all. There is a similar thread running on the developer list but no
>> answers from Openmoko. Normal for a cold start would be 45secs-2min and with
>> agps ~15secs. This is industry standard and stated on the specs page of
>> u-blox. The GTA01 (Neo 1973) gets a fix in one minute after a cold start.
>>
>> All modern chips (and the u-blox is a modern chip) can get a fix without
>> downloading the full almanac (which takes 12.5 minutes). The ephemeris is
>> sufficient and comes in 30secs.
>>
>> I think this is an important issue and hope that Sean or Wolfgang can give
>> answers. I CC'd Steve too, because this equally effects the VAR markets.
>>
>> If they don't answer it is probably the best to send your FR back before the
>> warrenty expires and buy a new FR once this issue is resolved.
>>
>> Marcus
>>
>>
>>
>>
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>> community at lists.openmoko.org
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>>     
>
>
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