[USRP-users] Help: USRP N200 not detected

Ben Hilburn ben.hilburn at ettus.com
Wed Sep 4 20:17:49 EDT 2013

All -

Just to re-iterate Josh's point, we are looking into this now, and should
have a fix for our production test stand shortly.

Thanks for the bug report, and I'm glad that everyone (at least in this
thread) has been able to recover their devices. If anyone has any further
issues, please don't hesitate to contact us. We apologize for the
inconvenience, and thanks again.


Ettus Research, LLC <http://www.ettus.com/>   |   USRP <http://goo.gl/Ixjhh>

On Wed, Sep 4, 2013 at 5:02 PM, Juha Vierinen <x at mit.edu> wrote:

> About 10 of the recent USRP N200 devices that we have purchased have had
> bogus firmware (the devices were basically in a bricked state).
> This can be fixed by powering up the USRP with the blue button on the
> middle of the circuit board pressed down. After this the D and F leds are
> lit and the usrp has an ip address of This allows you to burn
> the most recent firmware.
> juha
> On Tue, Sep 3, 2013 at 8:12 AM, Mythili Vutukuru <mythili at cse.iitb.ac.in>wrote:
>> Hello all,
>> Our lab has recently acquired some N200 USRPs with SBX daughterboards. I
>> have an Ubuntu desktop with a gigabit ethernet interface. I have connected
>> the N200 + SBX to it via ethernet. I have installed GNURadio + UHD using
>> Marcus Leech's build-gnuradio script. I have configured a static IP of
>> on my machine. When I power my USRP on, all LEDs except LED B
>> flash (expected since LED B is MIMO cable which I am not using), and LED F
>> alone stays on. The ethernet light glows inside the USRP, so I know there
>> are no loose connections on the netwprk side. Now, the problem is that my
>> system does not detect the USRP at all.
>> ----------
>> mythli at mythli:~$ uhd_find_devices
>> linux; GNU C++ version 4.7.2; Boost_104900; UHD_003.005.003-119-ga812d8a3
>> No UHD Devices Found
>> -----------
>> When I open the net burner GUI also, my device does not show up. When I
>> try to ping, I get no reply. In tcpdump, I see that ARP
>> requests from my machine for are going unanswered. Here is my
>> machine:
>> ----------
>> mythli at mythli:~$ uname -a
>> Linux mythli 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:32:08 UTC 2012
>> i686 i686 i686 GNU/Linux
>> ----------
>> While I have used USRP1 + RFX2400 before, this is my first time using
>> N200. I have googled extensively on this issue, but I am stuck. I am
>> wondering if I am missing something fundamental in the setup. Any help /
>> tips / pointers are very much appreciated.
>> Thanks,
>> Mythili
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