I have removed OpenBTS and USRP drivers and reinstalled with same results. On the USRP the 'E' LED is active which indicates a reference lock. When I ran kalibrate with the -x option this comes off and ./kal -s GSM900 finds nothing. Is there any additional info I can provide to assist with troubleshooting this problem?
> From: firstname.lastname@example.org > Date: Thu, 23 Feb 2012 17:39:34 +0400 > Subject: Re: [Openbts-discuss] Network does not appear in list > To: email@example.com > CC: firstname.lastname@example.org; email@example.com > > Thomas, > > On Thu, Feb 23, 2012 at 11:05, Thomas Tsou <firstname.lastname@example.org> wrote: > > On Wed, Feb 22, 2012 at 6:18 AM, Samuel Liverpool <email@example.com> wrote: > >> Hi Alex, > >> > >> No I am not sure that it is being used by the USRP, but I did follow the > >> instructions to enable it and therefore assumed that it is working. I also > >> see a reference to it in kal. Here is the output from kal -s GSM900 > > > > Let me say first that there was a bug in Kal that would prevent > > auto-configuration of the GPSDO. It should have worked fine if you > > explicitly specified the external reference. > > > > https://github.com/ttsou/kalibrate-uhd/commit/3809ed65 > > > > That said, the GPSDO should configure itself automatically in OpenBTS > > and kal. However, you can explicitly specify the 'external' reference > > in either case. External means the internal on-board reference is > > disabled and the front panel connection _or_ GPSDO is used - which one > > is determined by the jumper setting. > > > > In kal you can specify the reference on the command line. With OpenBTS > > there is the "--with-extref" option at build time. > > Hum. Should we probably make it a runtime configuration option? > > >> linux; GNU C++ version 4.6.1; Boost_104601; UHD_003.004.000-122b947 > >> > >> -- Opening a USRP2/N-Series device... > >> -- Current recv frame size: 1472 bytes > >> -- Current send frame size: 1472 bytes > >> -- Found a Jackson Labs GPS > >> -- Setting references to the internal GPSDO > >> -- Initializing time to the internal GPSDO > > > > It is possible that kal started with the GPSDO and then proceeded to > > disable it, which would be very confusing. Sorry about that. > > > >> UHD Warning: > >> The hardware does not support the requested RX sample rate: > >> Target sample rate: 0.270833 MSps > >> Actual sample rate: 0.271739 MSps > > I wonder, is automatically Kal doing resampling with USRP2? > > > -- > Regards, > Alexander Chemeris.