[USRP-users] USRP X310 GPS or IEEE 1588 Synchronization

Rob Kossler rkossler at nd.edu
Wed Feb 27 15:39:54 EST 2019


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 at 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 at 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
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>>
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