Hi Ofer, Here is my understanding - The E310 can sync to a PPS signal (either external input or obtained from GPS). From this PPS, the E310 derives the 10MHz ref signal and uses that as ref for LO signal. So, there will be lots of phase variation between the LOs in all of your E310 devices even though they will all be trying to stay in sync with a 1 pulse-per-second signal. - Regarding your time synchronization question, there are examples of setting the E310 clock (using set_time_next_pps, I think) to match the GPS clock. Thus, all of your E310s could have the same time. But, how do you plan to control all of your E310s when you want the transmit to turn on? Will you have an SSH session to each of them? Rob
On Fri, Dec 4, 2020 at 2:28 PM Ofer Saferman via USRP-users < usrp-users@lists.ettus.com> wrote: > Hello, > I would like to synchronize several E310 devices. > It is my understanding that the only way to do that is by connecting a GPS > antenna and performing disciplining to a derived 1-PPS signal. > I have a few questions to help me better understand how to make it work: > 1. Does GPS disciplining achieve frequency lock between devices or phase > lock? > 2. How to start transmitting at the exact moment on all synchronized > devices? Can the unit clock be synchronized to GPS clock? and then just > start the transmission with some delay from unit clock on all devices? Can > someone share the relevant C commands to perform the time synchronization > to GPS clock or point to a relevant code example? > > Thanks, > Ofer Saferman > > > -- > This message has been scanned for viruses and > dangerous content by *MailScanner* <http://www.mailscanner.info/>, and is > believed to be clean. _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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