On Thu, Aug 13, 2020 at 3:14 PM Marcus D. Leech via USRP-users <
usrp-users@lists.ettus.com> wrote:

> How are you detecting "lock"


By querying the "ref_locked" sensor, and also looking at the LED which is
consistent.


> Could you share a code snippet of how you set up the clocking parameters?


uhd_usrp_set_time_source(radio.usrp, "external", 0);

 Have you tried a different 1PPS source?


I've tried two different GPS. NB the GPS stays powered always between
application restarts and unplugging.

cheers,
Aaron

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