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

Nate Temple nate.temple at ettus.com
Thu Feb 28 16:25:14 EST 2019


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 <rkossler at 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 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
>>> _______________________________________________
>>> USRP-users mailing list
>>> USRP-users at lists.ettus.com
>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>
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>
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