Re: [USRP-users] Problems receiving with B210 and X310

[Michael Dickens via USRP-users]

Hi Andrew - That's certainly interesting! Have you tried a more recent
version of UHD? 3.14.1.1 is the latest release, and it might contain fixes
for the issue you're having. Worth a try IMHO. - MLD

On Mon, Oct 28, 2019 at 2:41 PM Boggio-Dandry, Andrew via USRP-users <
usrp-users@lists.ettus.com> wrote:

> Hello,
>
>
>
> We are having trouble with spikes in received signals. This happens with
> both the X310 and B210. We have a stable setup using Ubuntu 17.10 and UHD
> 3.10.3.0. There are no receive problems. On Ubuntu 18.04 and/or Ubuntu
> 16.04, however, no matter the version of UHD these spikes appear. For
> example, our Ubuntu 17.10 running UHD 3.10.3.0 with a B210 and Ubuntu 18.04
> running UHD 3.10.3.0 with a B210 were both set to receive and captured the
> following *at the same time* using rx_samples_to_file --freq 2.484e9
> --rate 20e6 --gain 20 --args --wirefmt sc16 --file file_13.dat --duration 1.
> We did not transmit anything, we just wanted to capture the noise.
>
>
>
> *Plotting real part of received noise from Ubuntu 17.10, UHD 3.10.3.0
> setup:*
>
>
>
> *Plotting real part of received noise from Ubuntu 18.04, UHD 3.10.3.0
> setup:*
>
>
>
> As you can see, the spikes appear on the B210 capture on the machine
> running Ubuntu 18.04 with UHD 3.10.3.0. When you zoom in very close on the
> spikes:
>
>
>
>
>
> Any idea why this may be happening? Any suggestions would be appreciated.
>
>
>
>
>
> [image: Logo] 
>
> *Andrew Boggio-Dandry* *| Ph.D. Student*
>
> *Department of Electrical & Computer Engineering,*
>
> *University at Albany, State University of New York*
> *e:* aboggio-dan...@albany.edu
>
> *w:* https://www.andrewboggio.com
> *m:* 518-687-3102
>
> [image: facebook icon]  [image:
> twitter icon]  [image: linkedin icon]
>  [image: instagram icon]
> 
>
>
>
>
>
>
> ___
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>


-- 
Michael Dickens
Ettus Research Technical Support
Email: supp...@ettus.com
Web: https://ettus.com/
___
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

[USRP-users] Problems receiving with B210 and X310

[Boggio-Dandry, Andrew via USRP-users]

Hello,

We are having trouble with spikes in received signals. This happens with both 
the X310 and B210. We have a stable setup using Ubuntu 17.10 and UHD 3.10.3.0. 
There are no receive problems. On Ubuntu 18.04 and/or Ubuntu 16.04, however, no 
matter the version of UHD these spikes appear. For example, our Ubuntu 17.10 
running UHD 3.10.3.0 with a B210 and Ubuntu 18.04 running UHD 3.10.3.0 with a 
B210 were both set to receive and captured the following at the same time using 
rx_samples_to_file --freq 2.484e9 --rate 20e6 --gain 20 --args --wirefmt sc16 
--file file_13.dat --duration 1. We did not transmit anything, we just wanted 
to capture the noise.

Plotting real part of received noise from Ubuntu 17.10, UHD 3.10.3.0 setup:
[cid:image001.png@01D58D9D.AB734DA0]

Plotting real part of received noise from Ubuntu 18.04, UHD 3.10.3.0 setup:
[cid:image002.png@01D58D9D.AB734DA0]

As you can see, the spikes appear on the B210 capture on the machine running 
Ubuntu 18.04 with UHD 3.10.3.0. When you zoom in very close on the spikes:

[cid:image003.jpg@01D58D9D.AB734DA0]

Any idea why this may be happening? Any suggestions would be appreciated.


[Logo]
Andrew Boggio-Dandry | Ph.D. Student
Department of Electrical & Computer Engineering,
University at Albany, State University of New York
e: aboggio-dan...@albany.edu
w: https://www.andrewboggio.com
m: 518-687-3102
[facebook icon] [twitter icon] 
  [linkedin icon] 
  [instagram icon] 




___
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com