Are the antennae situated outdoors? It can take almost an hour to achieve lock from a cold start.
Sent from my iPhone > On Feb 19, 2021, at 4:14 AM, Johannes Demel <de...@ant.uni-bremen.de> wrote: > > Each USRP has its own GPS antenna. One of those you buy at ettus.com as a > recommended accessory. > >> On 18.02.21 15:05, Marcus D Leech wrote: >> 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
