Hello, To get time and frequency alignment on a pair of E31xs you can supply the 1PPS to both units. The example programs do not all support setting the time source. http://files.ettus.com/manual/page_usrp_e3x0.html#e3x0_hw_sync
Here is an example which supports setting the time source, you can modify other examples based on this. https://github.com/EttusResearch/uhd/blob/maint/host/examples/test_pps_input.cpp#L68 Are you trying to achieve phase synchronization? Regards, Derek On Tue, Jul 25, 2017 at 11:40 PM, Cho, Daniel J (332C) via USRP-users < usrp-users@lists.ettus.com> wrote: > Hello – > > > > I have 2 USRPs (both E310/E312) which I want to sync up using an external > clock. I read that the embedded series cannot take in a 10MHz reference > clock but can take in a 1PPS. I generated a 1 PPS signal using a signal > generator and using a power splitter, I sent the 1PPS signal to both USRPs > via the sync port on the USRPs. When I try to run an example programs > (rx_samples_to_file on one USRP and tx_samples_from_file on the other USRP) > using the ref argument, it says that the ref argument is not supported. > How can I sync up the two USRPs? > > > > Thanks > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >
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