How are you delivering the GPS antenna signal to the USRPs? Via a splitter? Does that splitter provide DC pass-through?
Sent from my iPhone > On Feb 18, 2021, at 7:07 AM, Johannes Demel via USRP-users > <usrp-users@lists.ettus.com> wrote: > > Just a quick follow-up. The B210 finally got a GPS lock. (I had to wait for > ~2h). Though, all N310s still don't. > >> On 18.02.21 10:12, Johannes Demel via USRP-users wrote: >> Hi all, >> I have some N310s and a B210 that I try to sync with a GPSDO. All of them >> recognize their GPSDOs but fail to lock. >> My phone can see ~7 Satellites. We have a RPi with a GPS module that locks >> to GPS in the same hall. We switched antennas but still, we can't sync any >> of the USRPs to GPS. >> I tried: >> ``` >> lib/uhd/utils/query_gpsdo_sensors >> ``` >> and >> ``` >> lib/uhd/examples/sync_to_gps >> ``` >> but even after a day, they always return "GPS does not have lock" and >> "WARNING: GPS not locked - time will not be accurate until locked". >> `gpsmon` on the N310s reports 0 Satellites. But it has a list of satellites. >> Since we have several devices in that room that are able to acquire a lock >> but none of our USRPs with their GPSDOs, I wonder what is going on. Do they >> need a very strong signal? >> Cheers >> Johannes > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
