[USRP-users] [Openbts-discuss] [ANNOUNCE] OpenBTS USRP2 support

hanwen kidult.hanwen at gmail.com
Tue Nov 30 16:44:34 EST 2010

Hi, *,

The OpenBTS works with my USRP2+1 WBX works pretty fine. Actually, this is
the first time in my life that I successfully made a call with OpenBTS. As I
don't have RFX900/1800 boards, I tried to make it work with USRP1+WBX before
but failed.

THANKS to Thomas and other guys contribute to this UHD-supported OpenBTS!

I still got the ALARMS when starting OpenBTS:
1291152553.1603 ALARM 3073911008 TRXManager.cpp:447:setMaxDelay: SETMAXDLY
failed with status -1
1291152553.1605 ALARM 3073911008 TRXManager.cpp:458:setRxGain: SETRXGAIN
failed with status -1

And when I tried to use rxgain command to set RX gain, I still get this:
1291153403.5711 ALARM 3074988256 TRXManager.cpp:458:setRxGain: SETRXGAIN
failed with status -1
new RX gain is 0 dB

Any clue for this problem?


2010/11/17 Thomas Tsou <ttsou at vt.edu>

> I'm announcing the availability of USRP2 support with OpenBTS. The
> patch set consists of a new device implementation that uses the UHD
> driver from Ettus Research and allows the use of an external 10MHz
> reference clock. Additional implementation details can be found in the
> comments and commit log.
> Download:
> git clone git://github.com/ttsou/openbts-uhd.git
> git clone http://github.com/ttsou/openbts-uhd.git
> http://github.com/ttsou/openbts-uhd/tarball/master
> GitHub:
> http://github.com/ttsou/openbts-uhd
> Build:
> USRP2 support requires the UHD driver and firmware. GNU Radio is not
> required.
> http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki
> ./bootstrap
> ./configure --with-uhd
> make
> Without the '--with-uhd' option, the standard USRP1 implementation
> will be built.
> Release Notes:
> *The USRP2 is clocked at 100MHz and does not output fractional sample
> rates, so only the non-52M Transceiver is available.
> *Tested with a single WBX board, which is capable of operation on all
> 4 GSM bands. Other boards should work, but are untested.
> *Operation in the upper bands (1800, 1900MHz) requires an external
> reference for reliable operation. This is true to a lesser extent in
> the lower bands as well.
> External Reference Clock:
> The front panel 10MHz reference input of the USRP2 can be used to
> improve stability of the internal oscillator (~20 ppm). To test
> frequency offset, a modified version of Kalibrate -
> http://thre.at/kalibrate - is available. Information and examples for
> the UHD development branch can be found here.
> http://ttsou.github.com/kalibrate-uhd
> That's about it. Hopefully, a number of people will find this useful.
> Let me know if you have any questions. Comments and feedback are
> always welcome.
>  Thomas
> ------------------------------------------------------------------------------
> Beautiful is writing same markup. Internet Explorer 9 supports
> standards for HTML5, CSS3, SVG 1.1,  ECMAScript5, and DOM L2 & L3.
> Spend less time writing and  rewriting code and more time creating great
> experiences on the web. Be a part of the beta today
> http://p.sf.net/sfu/msIE9-sfdev2dev
> _______________________________________________
> Openbts-discuss mailing list
> Openbts-discuss at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/openbts-discuss
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20101130/80353b3a/attachment-0002.html>

More information about the USRP-users mailing list