[USRP-users] Does each antenna of USRP N210 can both transmit and receive?

Alex Zhang cingular.alex at gmail.com
Tue Jun 26 12:23:36 EDT 2012


Hi Nick,

Do you have any comments on my problem?

Thanks.

On Mon, Jun 25, 2012 at 3:33 PM, Alex Zhang <cingular.alex at gmail.com> wrote:

> Maybe I did not use the SBX correctly.
> What I observed is that the if the my USRP tries to receive something
> right after it just complete a packet transmission, it always fails in
> receiving the correct data, even the repsonder sends out the reply
> correctly. Thus I add delay at the responder before each reply is
> transmitting, as the other side is still in TX/RX switching.
>
> Please see this link for my problem description.
> http://comments.gmane.org/gmane.comp.hardware.usrp.e100/3964
>
> I have tried to set the TX and RX at different antennas, like the RX is
> RX2, TX is at TX/RX. But the problem still there, more like as working in
> half-duplex mode.
>
>
> On Mon, Jun 25, 2012 at 3:04 PM, Nick Foster <nick at ettus.com> wrote:
>
>> On Mon, Jun 25, 2012 at 12:58 PM, Alex Zhang <cingular.alex at gmail.com>wrote:
>>
>>> SBX board claims to support full-duplex.
>>> However, I still have problem in using SBX board to carry out the
>>> full-duplex communication.
>>>
>>
>> Alex,
>>
>> SBX is by design full duplex. XCVR2450 is half-duplex by nature and was
>> not designed for simultaneous TX/RX. Could you please elaborate on how SBX
>> is not functioning in full duplex mode in your application?
>>
>> --n
>>
>>
>>>
>>> On Mon, Jun 25, 2012 at 1:39 PM, <mleech at ripnet.com> wrote:
>>>
>>>> **
>>>>
>>>> On 25 Jun 2012 14:33, Weixian Zhou wrote:
>>>>
>>>> I am using USRP N210 and the daughter boards are XCVR2450. Does each
>>>> antenna can both transmit and receive, or one antenna can only transmit and
>>>> another can only receive?
>>>>
>>>> --
>>>> Regards,
>>>> Weixian Zhou
>>>>
>>>>
>>>> http://files.ettus.com/uhd_docs/manual/html/dboards.html#xcvr-2450
>>>>
>>>> Either port can perform either function.  But it's a half-duplex
>>>> device, so you can't TX and RX at the same time.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> USRP-users mailing list
>>>> USRP-users at lists.ettus.com
>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>>
>>>>
>>>
>>>
>>> --
>>>
>>> Alex,
>>> *Dreams can come true – just believe.*
>>>
>>>
>>> _______________________________________________
>>> USRP-users mailing list
>>> USRP-users at lists.ettus.com
>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>
>>>
>>
>
>
> --
>
> Alex,
> *Dreams can come true – just believe.*
>
>


-- 

Alex,
*Dreams can come true – just believe.*
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