[USRP-users] USRP N210 send and receive strange

Marcus D. Leech mleech at ripnet.com
Tue Sep 10 09:17:09 EDT 2013


On 09/10/2013 04:25 AM, ??? wrote:
> Dear all,
>     I have three new USRP N210 with SBX Board (Rev 5.1) which I just 
> received from ettus. When I use our LTE code to test the new USRP(one 
> USRP to send,and another USRP to receive), I find the code can not run 
> properly, because the frequency offset is too large,up to about 
> 1.5kHz.   However, when I only change the SBX board from new Rev5.1 to 
> Rev5, the code can run correctly, and the frequency offset is about 
> 300~400Hz.
>
>     So I do not understand why the performance of new sbx 
> sub-board(Rev5.1)  is even worse than the old one. Or is there anyone 
> can tell me whether the result has relationship with uhd drivers?  We 
> use uhd_3.1.2 drivers, but it has previously been very stable and 
> never has such a problem about frequency offset.
>
>    Can anyone help me?
>    Thank you!
>
> ------------------
> Zhonghua He
>
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users at lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
What is your operating frequency?


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