I've owned a ONE XL for 3 weeks. The first two weeks it worked great, but last weekend as I was driving around it suddenly lost its GPS fix 
. It was working fine, and then it just stopped. I continued to drive for a few more hours, rebooted a number of times, but I was unable to obtain a fix again. It was just stuck at my last known position.
I called tech support today, and they told me to delete QuickGPSFix from the TT Home downloads folder on my PC, which would force it to reinstall the next time I connected and update the ephemeris data. I did this, and almost instantly I had a new fix! Great, everything seems back to normal, but I'm still wondering if my device has a problem.
If the real problem was simply that the ephemeris was out of date, then that doesn't explain this:
1) Why did I lose my GPS fix suddenly in the middle of my trip? As long as you have a fix, the GPS receiver should update its own ephemeris. That data is contained in the GPS signal.
2) Even if the ephemeris was out of date (however unlikely that was), the receiver should not need recent ephemeris data to reacquire the GPS signals. The process may take much longer, but any GPS receiver should be able to wake up from a cold start. So, eventually I should have obtained a new fix anyway.
Has anyone else had this issue? Is there a problem with my unit? When I'm on the road I obviously can't connect to TT Home to update the ephemeris data, so if this is going to cause me to lose my fix every so often then I think I have to look for a new unit.
. It was working fine, and then it just stopped. I continued to drive for a few more hours, rebooted a number of times, but I was unable to obtain a fix again. It was just stuck at my last known position.I called tech support today, and they told me to delete QuickGPSFix from the TT Home downloads folder on my PC, which would force it to reinstall the next time I connected and update the ephemeris data. I did this, and almost instantly I had a new fix! Great, everything seems back to normal, but I'm still wondering if my device has a problem.
If the real problem was simply that the ephemeris was out of date, then that doesn't explain this:
1) Why did I lose my GPS fix suddenly in the middle of my trip? As long as you have a fix, the GPS receiver should update its own ephemeris. That data is contained in the GPS signal.
2) Even if the ephemeris was out of date (however unlikely that was), the receiver should not need recent ephemeris data to reacquire the GPS signals. The process may take much longer, but any GPS receiver should be able to wake up from a cold start. So, eventually I should have obtained a new fix anyway.
Has anyone else had this issue? Is there a problem with my unit? When I'm on the road I obviously can't connect to TT Home to update the ephemeris data, so if this is going to cause me to lose my fix every so often then I think I have to look for a new unit.
