[prev in list] [next in list] [prev in thread] [next in thread]
List: usrp-users
Subject: Re: [USRP-users] Data rate is half of sampling rate
From: Marcus_Müller via USRP-users <usrp-users () lists ! ettus ! com>
Date: 2016-10-29 5:22:07
Message-ID: E8E5C2E9-8FED-4E28-9371-7D9DBF45A8A6 () ettus ! com
[Download RAW message or body]
[Attachment #2 (multipart/alternative)]
Dear Qi,
MHz is not a unit of storage bandwidth; did you mean MB/s?
Anyway, it's impossible to know what's happening here without knowing what kind of \
software you're using. You mention a file sink, so I guess this is a self-built GNU \
Radio flow graph?
Best regards,
Marcus
Am 28. Oktober 2016 19:53:17 MESZ, schrieb Qi Dong via USRP-users \
<usrp-users@lists.ettus.com>:
> Hi all,
>
> I am new to usrp devices. I am currently using N210 with daughter board
> UBX-40, trying to receive signals from the air, and write the raw data
> to a
> file sink.
>
> My problem is whenever I choose a sampling rate, the data rate written
> to
> file sink is always half of sampling rate. For example, when I set
> usrp sampling rate as 1Mhz, then I get 0.5Mhz data rate from the
> content of
> file sink. Did I miss something? I didn't see any setup options like
> down-sampling or decimation in usrp source block.
>
> Thank you
>
> Qi
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
[Attachment #5 (text/html)]
<html><head></head><body>Dear Qi,<br>
<br>
MHz is not a unit of storage bandwidth; did you mean MB/s?<br>
<br>
Anyway, it's impossible to know what's happening here without knowing what \
kind of software you're using. You mention a file sink, so I guess this is a \
self-built GNU Radio flow graph?<br> <br>
Best regards,<br>
Marcus<br><br><div class="gmail_quote">Am 28. Oktober 2016 19:53:17 MESZ, schrieb Qi \
Dong via USRP-users <usrp-users@lists.ettus.com>:<blockquote \
class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, \
204, 204); padding-left: 1ex;"> <div dir="ltr">Hi all,<div><br /></div><div>I am new \
to usrp devices. I am currently using N210 with daughter board UBX-40, trying to \
receive signals from the air, and write the raw data to a file sink. </div><div><br \
/></div><div>My problem is whenever I choose a sampling rate, the data rate written \
to file sink is always half of sampling rate. For example, when I set usrp sampling \
rate as 1Mhz, then I get 0.5Mhz data rate from the content of file sink. Did I miss \
something? I didn't see any setup options like down-sampling or decimation in \
usrp source block.</div><div><br /></div><div>Thank you</div><div><br \
/></div><div>Qi</div></div> <p style="margin-top: 2.5em; margin-bottom: 1em; \
border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />USRP-users mailing \
list<br />USRP-users@lists.ettus.com<br /><a \
href="http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com">http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com</a><br \
/></pre></blockquote></div><br>
-- <br>
Sent from my Android device with K-9 Mail. Please excuse my brevity.</body></html>
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
[prev in list] [next in list] [prev in thread] [next in thread]