Hello, Thanks to http://wiki.openmoko.org/wiki/Freerunner_Hardware_Issues , I ran into the following (and quite scary) thread : http://lists.openmoko.org/pipermail/hardware/2008-April/000055.html
So I was wondering, maybe the poor GPS performance issue many FR seem to have, especially on the internal antenna, is related to the GPS antenna MUX (the part responsible for the switch between internal antenna, and external antenna if you hook one up) selecting the external antenna, even when there isn't one ? The randomness of this issue could be explained because driving the mux with levels like 26% Vdd is kind of "grey zone" and can result in some devices working as expected and some selecting the ext. antenna without one and then having bad reception. I see one way to test this theory, by driving the select signal VCONT to 0V (Werner Almesberger talks about shorting R7616) and see if this improve reception on the internal antenna. This is pure speculation, I didn't test anything and perhaps that's just plain stupid but I'd love to hear from someone that focused on this issue back in April. -- Phyce _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
