Hello, I know that the 10GbE ethernet interface is adding an extra 500us round trip time delay with fiber DAC. I tested it myself. 1 GbE would probably give a similar delay as well. So do you think it would stay below our delay budget of 250us?
Regards, Akın On Fri, 1 Mar 2019 00:24 Nate Temple <nate.tem...@ettus.com wrote: > Hi Rob, > > Yes, that's correct, you can use the WR-LEN with the X310. > > Regards, > Nate Temple > > > > > > > On Wed, Feb 27, 2019 at 12:40 PM Rob Kossler <rkoss...@nd.edu> wrote: > >> Nate, >> Although the X3xx series to not natively support White Rabbit, I believe >> that they can get all of the benefits by using a WR-LEN in close proximity >> to the X310. Is that correct? >> >> Rob >> >> On Wed, Feb 27, 2019 at 11:45 AM Nate Temple via USRP-users < >> usrp-users@lists.ettus.com> wrote: >> >>> Hi Akin, >>> >>> The Octoclock-G would be suitable for this purpose, and yes, it does >>> contain a GPSDO (OCXO). https://kb.ettus.com/GPSDO#GPSDO_.28OCXO.29 >>> >>> The Octoclock-G does not contain an antenna, you must provide one to the >>> GPS Antenna input (SMA). >>> >>> The X3xx series do not support IEEE 1588, however, the N3xx series USRPs >>> do support White Rabbit, which is an extension of the IEEE-1588-2008 >>> standard. More info can be found here on it >>> https://kb.ettus.com/Using_Ethernet-Based_Synchronization_on_the_USRP%E2%84%A2_N3xx_Devices >>> >>> >>> Regards, >>> Nate Temple >>> >>> On Wed, Feb 27, 2019 at 8:31 AM akin soysal via USRP-users < >>> usrp-users@lists.ettus.com> wrote: >>> >>>> Hello All, >>>> >>>> >>>> I have a question. We want to synchronize the clock of the two USRP >>>> X310s with a GPS or IEEE 1588 standard. I would like to synchronize the two >>>> USRPs with each other so that the base station and user terminal would not >>>> experience any synchronization issue. I also would like to synchronize one >>>> of the USRP X310s with an external base station, which supports IEEE 1588 >>>> and GPS clocks, and we have a synchronization budget of about *250us*. >>>> >>>> >>>> I learned that the setup that worked in France is using the following >>>> Ettus product: >>>> >>>> >>>> https://www.ettus.com/product/details/OctoClock-G >>>> >>>> >>>> Do you think that this would suffice for our needs? It has its own GPS >>>> clock and antenna inside, right? It is compatible with USRP X310? >>>> >>>> >>>> I know that the product specification does not include IEEE 1588, so I >>>> am concluding that it would not be possible to use this standard for our >>>> scenario, do you agree? >>>> >>>> Thanks and regards, >>>> >>>> Akın >>>> _______________________________________________ >>>> USRP-users mailing list >>>> USRP-users@lists.ettus.com >>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>>> >>> _______________________________________________ >>> USRP-users mailing list >>> USRP-users@lists.ettus.com >>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>> >>
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