Split both your 1pps and 10MHz and then run cables off the splitter to each
X310 separately using "equal length" cables and you should be "good enough",
dont daisy chain :)
> On May 14, 2018 at 4:28 AM harfan ryanu via USRP-users
> <usrp-users@lists.ettus.com> wrote:
>
> Hi All,
> I am building application with two USRP X310 configuration using daisy
> chain. When i try to synchronize both USRP using this :
>
> usrp.ptr->set_clock_source_out(true,0);
> usrp.ptr->set_time_source_out(true,0);
> usrp.ptr->set_clock_source("external",1);
> usrp.ptr->set_time_source("external",1);
>
> My configuration is the first usrp (with addr0 configuration
> 192.168.140.2) has an sma cable connected to the PPS Trig Out and Ref Out,
> while the other end of the sma cable is connected to second usrp (
>
> with addr1 configuration 192.168.40.2) through PPS Trig In and Ref In.
>
> I got an error message telling RuntimeError: Reference Clock PLL failed
> to lock to external source.
>
> I have explored some question in the past saying USRP x310 is not
> suitable for daisy chain and still in experimental however that thread is
> from 2014, i dont know if it is still valid.
>
> Could anyone help me to solve this problem?
>
> I am very grateful for any respond and help.
>
> Thank you very much,
>
>
> Regards,
>
> Harfan
>
> Sydney Uni
>
>
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