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Re: [Discuss-gnuradio] Subject: Re: USRP testing plesae help

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] Subject: Re: USRP testing plesae help
Date: Sat, 14 Jan 2012 09:13:46 -0500
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20101027 Fedora/3.0.10-1.fc12 Thunderbird/3.0.10

On 14/01/12 07:33 AM, smith mark wrote:

When I tried to connect DBSRX2 to RXB or RXA the it wasn't detected. I mean when I ran usrp_probe the model shown was 'unkown' and frequency range was from -9000000.0 to 9.000000. Any help what I need to do in order to check the DBSRX2 ?

DBSRX2 is only supported under UHD, not under the "classic" drivers.  If you run:

uhd_usrp_probe --args "type=usrp1"

You'll find that it can cope with the DBSRX2 just fine. Since you're a new user of this gear, without any
  necessity of backwards compatibility with older software, you should be using UHD exclusively.

I downloaded UHD from link above, then I did following.
cd UHD.
cd host
mkdir build
cd build
cmake ../
make install

But then when I ran uhd_find_devices I got following output:
"Ignoring discovered device RuntimeError: Expected protocol compatibility number 9, but got 7: The firware build is not compatible with the host code build. 
No UHD Devices Found"
Lights D and F are on the N210. No other lights.
Another question what is minimum speed required for LAN(Etherenet) interface on PC ? 100Mbps or 1000Mbps ?

The ethernet-connected devices (USRP2, N2XX) require 1 GiGe--they won't work at any other rate.

Follow the instructions here to update your N2XX firmware:


If you used the "build-gnuradio" script to build your Gnu Radio + UHD installation, it will also have downloaded
  the very latest master firmware, and placed it in /usr/local/share/uhd/images.

You might also look at the overall UHD documentation here:


Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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