Hello, On Tue, 4 Mar 2008 09:13:25 +0800 <[EMAIL PROTECTED]> wrote:
> I am the hardware engineer dedicate to RF parts. After reading your > statement about this issue, this issue may be caused by bad > connection of internal GSP antenna. Some tests should be performed on > your Neo. I will also send you two antennas. One is internal and the > other one is external. thanks for offering that, but no need. I already have an external antenna here and I have a couple Neos from which I can take internal antennas. > 1. Replace the new one on your Neo and check signal quality (In > open-sky, the TTFF is less than 50s) > If the result follows my expectation, the reason for this issue may > be repeat de-assembling to damage the RF cable of the internal GPS > antenna. I already tested another (known good) internal GPS antenna which didn't work either. My multimeter says the cable on both antennas are okay. > If not, I think you can do the next test > > 2. Plug the external antenna in our Neo and check the signal quality > > If the GPS is normal, I think the RF switch circuit (ESD sensitive) > is complete break-down. Yeah, did that and it got a fix in ~40s, so the GPS chip itself is working. > I will send you these two antenna as soon as possible. If any > question, let’s discuss together. If you have an idea what I can do to test the RF switch circuit let me know. I do have a soldering station and know how to use it. :-) Regards, Daniel Willmann
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