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
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