# Uhd blocks missing

**URL:** <https://www.ruby-forum.com/t/uhd-blocks-missing/231306>\
**Category:** GNU Radio\
**Created:** [August 2, 2014, 2:05am UTC](https://www.ruby-forum.com/t/uhd-blocks-missing/231306 "2014-08-02T02:05:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [August 2, 2014, 2:05am UTC](https://www.ruby-forum.com/t/uhd-blocks-missing/231306/1 "2014-08-02T02:05:39Z")

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Hello,

I am using ubuntu 13.10 and I installed gnuradio using the ‘apt-get  
install  
gnuradio’ command as described here

[http://gnuradio.org/redmine/projects/gnuradio/wiki/InstallingGR](http://gnuradio.org/redmine/projects/gnuradio/wiki/InstallingGR)

I did not experience any errors or issues with the above install. Now  
it’s  
not clear to me how I should proceed to get the gr-uhd blocks to appear  
in  
gnuradio-companion so I can use my USRP N210. I’ve installed the uhd  
software as described here

[http://code.ettus.com/redmine/ettus/projects/uhd/wiki/UHD\_Linux](http://code.ettus.com/redmine/ettus/projects/uhd/wiki/UHD_Linux)

after installing gnuradio (order of operations issue?) but I still don’t  
have access to usrp\_sink or usrp\_source from gnuradio-companion. What  
steps  
should I take?

Thanks,  
Rich

---

<div class="post-metadata">

**Author:** ![reback](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/b5ac83/32.png) [@reback](https://www.ruby-forum.com/u/reback)\
**Post date:** [August 2, 2014, 2:40am UTC](https://www.ruby-forum.com/t/uhd-blocks-missing/231306/2 "2014-08-02T02:40:56Z")

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On 08/01/2014 08:04 PM, Richard B. wrote:

> the uhd software as described here
> 
> [http://code.ettus.com/redmine/ettus/projects/uhd/wiki/UHD\_Linux](http://code.ettus.com/redmine/ettus/projects/uhd/wiki/UHD_Linux)
> 
> after installing gnuradio (order of operations issue?) but I still  
> don’t have access to usrp\_sink or usrp\_source from gnuradio-companion.  
> What steps should I take?
> 
> Thanks,  
> Rich

The version of Gnu Radio you’ll have from the official repos is going to  
be horribly out of date, which is part of the reason that Ettus offers  
a combined installation package for GR+UHD:

[http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki/GNURadio\_Linux](http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki/GNURadio_Linux)

So, I would do a:

sudo apt-get purge gnuradio gnuradio\* uhd uhd\*

And then follow the instructions given above from the Ettus site, OR:

Or use PyBombs or build-gnuradio to install from source:

[http://gnuradio.org/redmine/projects/gnuradio/wiki/InstallingGRFromSource](http://gnuradio.org/redmine/projects/gnuradio/wiki/InstallingGRFromSource)

–  
Marcus L.  
Principal Investigator  
Shirleys Bay Radio Astronomy Consortium

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