Am 07.02.2013 um 14:36 schrieb Pascal Gosselin: > > Yesterday I was able to confirm that the installation of the Golden Delicious > NavBoard V3 very seriously degrades the performance of GPS when using the > built-in GPS antenna. Getting a 3D fix is taking over 20 minutes on average > using the built-in GPS antenna. When using an external GPS antenna, the > issue goes away and an unaided GPS cold start can be achieved in about 41 to > 44 seconds.
Or can it be that the U.FL cable for the GPS antenna module is broken? I know that it is a weak point of the Openmoko antenna module design, but it can be repaired by cutting off the broken end and resoldering. If the cable becomes too short, get a precrimped 100mm U.FL - U.FL jumper cable and cut in the middle. In that case it could be that after mounting everyting, the LNA of the GPS Module is no longer working and you loose >20dB of signal amplification. You can easily check by measuring the DC-voltage at the GPS Module. Or the resistance at the U-FL end of the cable (should read ~50 Ohm). Nikolaus _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
