Hi guys, as I wrote before ( but the message did apparently not hit the list since I used a different email address ) I had the hardware fix applied on friday but used a 0603 cap instead, which fit quite nicely.
After further testing I can only congratulate the OM-team for their quick and easy fix: whether inside at the window, in a moving train or in narrow streets, the FR is aquiring a Fix consistenly within about 120s from cold start under the most difficult conditions, and of course even faster at consecutive tries ( warm start ). Under normal conditions, a TTFF of 40s seems to be the maximum needed even for a cold start, which in my opinion is exceptionally good! The SD-Card (4GB) still works as expected by this RF only fix, and there is no need to unmount it ... Btw, this was all done with the mwester-andy kernel from 080716... Big thumbs up to everyone at OM, now let the mapping begin ;-) Stefan On Fri, Jul 18, 2008 at 1:26 PM, Stefan Fröbe <[EMAIL PROTECTED]> wrote: Great work, and I can confirm this to be working just fine !!! That's an advantage of working in a company in the semiconductor business: enough people with the skills and tools able to try this modification out on a lunchbreak - now I get a TTFF from cold boot of 150s under most difficult conditions: Clouds / Mist, and high buildings on two sides. The previous software-only improvements were of mixed results: only once did a fix occur, and by far not as fast as the 34s I got without SD-Card. Will keep you updated on further results this weekend, but so far it is great news to see a fix this quickly! Keep up the great work and spirit, Cheers, Stefan On Sun, Jul 20, 2008 at 6:25 PM, Yaroslav Halchenko <site-openmoko.org@ onerussian.com> wrote: > hm... or alter clocking pulse sufficiently for unstable SD performance > with some (or all) SDs... how could we know for sure unless verified > empirically... (noone could guess that having SD impacts GPS for quite > a while, right?) > > I am not yet planing to do this hw mod on my phone, thus I can't really > compare, and it would be great if anyone having such modded phone (I > guess OM people) do such a simple test (basic IO testing of SD card > similar to the ones which were posted to this list before). > > NB It would be really pathetic if then after new 'fixed' units are > shipped, and new owners start complain that 50% of SD cards do not work > or get significant performance reduction, right? So why not to make sure > (I bet they already did smth like that thus it is just for someone from > OM give results with numbers) > > On Sat, 19 Jul 2008, Michael Kluge wrote: > > > This additional capacitor has been added between clock and GND for the > > SD card. So it is most probably just there to filter frequencies higher > > than the clock rate itself. > > > Michael > -- > Yaroslav Halchenko > Research Assistant, Psychology Department, Rutgers-Newark > Student Ph.D. @ CS Dept. NJIT > Office: (973) 353-5440x263 | FWD: 82823 | Fax: (973) 353-1171 > 101 Warren Str, Smith Hall, Rm 4-105, Newark NJ 07102 > WWW: http://www.linkedin.com/in/yarik > > _______________________________________________ > Openmoko community mailing list > email@example.com > http://lists.openmoko.org/mailman/listinfo/community >
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