Re: USRP N210 Synchronization

[Martin Braun]

USRPs typically operate with a 25% duty cycle PPS (i.e., 250 ms on, 750 ms off). But they will work with pretty much any duty cycle.

Check the levels are within limits (I don't have them off the top of my head). I would suggest you connect your PPS/10 MHz generator directly to the USRP, and see if that works. Then, the splitter to see if that's ruining your levels.

Note that we sell such a splitter: https://www.ettus.com/all-products/octoclock/

I might be more than your budget, which I understand, but it's what we usually use for these types of applications.

--M

On Wed, Mar 10, 2021 at 8:35 AM Vadym Sushko <vadim.sushko@gmail.com> wrote:

Hello. I am using USRP N210 devices in my work. I have the necessity to synchronize three USRP N 210 devices in order to implement coherent receiving for these devices. I would like to know if it is possible to synchronize the USRPs by using the splitted into three 10MHz and splitted into three PPS signals from one generator and connected correspondingly to each of the USRPs. Currently I have an error that my board "may not be getting a PPS signal, no PPS detected with the time interval".  What pulse duration should I use for PPS signal and how setup time interval for PPS detection? Maybe the problem is something else. 

Thank you in advance.