On 03/24/2020 12:49 PM, Olivier Ravard via USRP-users wrote:
Hi,In order to synchronize several devices, We used to use an external PPS and 10MHz reference and call set_next_time_pps. This works fine since many years using UHD 3.9 and N210. We recently use X300 + TwinRx using UHD 3.10.3 and it seems that it does not work. It seems that set_time_next_pps has no effect because the metadata.time_spec of the received streamed data always corresponds to the delay from the usrp object creation. Example: - during the synchro procedure: usrp.set_time_next_pps(time_spec_t(1585067798, 0.0)) - during receiving data: rx_stream->recv(&buff_sc16.front(), buff_sc16.size(), md, 1.0); cout << "received date :" << md.time_spec.get_full_secs() << " " << md.time_spec.get_frac_secs() << endl; // this line prints "received date :74 0.778126" if the usrp object was created since around 74 secs Does this function change its behavior ? thanks olivier
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