Thanks Josh This partially fixed the problem, in the sense that samples are now displayed on the fft window when running usrp2_fft.py, and it no longer says "channel 0 not receiving". However, it still fails to set the frequency of the receiver. Also, when I run usrp_siggen.py, I still get the same problem that the Tx frequency can't be set. In verbose mode, the output of usrp_siggen.py is as below. Any ideas on what else could be wrong?
Regards Ian. USRP interpolation rate: 16 USRP IF bandwidth: 6.25MHz Set TX gain to: 15.0 Using auto-calculated mid-point frequency Failed to set freq. (...etc...) >Your firmware and fpga images on the sd card are probably out of sync. >You can find images here: http://gnuradio.org/releases/usrp2-bin/trunk/ >and here are instructions on how to burn: >http://gnuradio.org/redmine/wiki/gnuradio/USRP2UserFAQ >-Josh On 01/28/2010 06:14 PM, Ian Holland wrote: > Hi Matt > > I have tried usrp2_fft.py -f 2.4G and also usrp2_fft.py -f 5.7G as you > suggest below. In both cases, the fft window opens but no trace is > displayed, and I see the following output in the terminal: > > usrp2: channel 0 not receiving > usrp2::rx_sample() failed > > I only recently received my USRP2s and XCVR2450s, which were shipped at > the end of December. Are there any known issues with the firmware on the > SD cards at this time, or do you have any other idea why I can't seem to > tune frequencies on these cards? > > Thanks > > Ian. > > -----Original Message----- > From: Matt Ettus [mailto:m...@ettus.com] > Sent: Friday, 29 January 2010 12:35 PM > To: Manav Seth > Cc: Ian Holland; discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] Unable to tune Tx or Rx with XCVR2450 on > USRP2 > > > > The -f argument to usrp2_fft.py is the frequency. By putting "-f 1000" > you are telling the system to try to tune the xcvr2450 to 1 kHz. The > specified range is 2.4-2.5 GHz and 4.9 to 5.9 GHz. 1 kHz is WAY outside > > of that range. I would suggest you try something like: > > usrp2_fft.py -f 5.7G > > Matt > > On 01/28/2010 05:35 PM, Manav Seth wrote: >> Actually no...its always returning false... >> when I use usrp2_fft.py with -f 1000 then output does come but still > it >> is unable to set the initial frequency though it did receive. >> >> I am still trying to figure out the problem... >> >> On Thu, Jan 28, 2010 at 3:43 PM, Ian Holland >> <ian.holl...@rlmgroup.com.au<mailto:ian.holl...@rlmgroup.com.au>> > wrote: >> >> On Wed, Jan 27, 2010 at 8:52 PM, Ian Holland >> <ian.holl...@rlmgroup.com.au<mailto:ian.holl...@rlmgroup.com.au>> >> wrote: >> Hi All >> >> I have been trying to set the Tx and Rx frequencies when using an >> XCVR2450 with a USRP2, but it seems these keep failing. A snippet > of my >> source code is below for setting the Tx frequency. >> The output of this portion of code is "Failed to tune Tx", and the >> frequencies are all 0, with spectrum_inverted being false. >> I have also tried to use usrp2_fft.py, and this fails saying > nothing is >> received on channel 0. >> Does anyone know what the problem could be? >> >> Thanks >> >> Ian. >> >> /* try tuning Tx to a test frequency */ >> double Fc = 2400000000.0; >> usrp2::tune_result TxTuneResult; >> bool successTx = device->set_tx_center_freq(Fc, >> &TxTuneResult); >> if(successTx) { >> cout<< "Tx Tune Successful:\n"; >> cout<< " Baseband Frequency: "<< >> TxTuneResult.baseband_freq<< "\n"; >> cout<< " DxC Frequency: "<< >> TxTuneResult.dxc_freq<< "\n"; >> cout<< " Residual Frequency: "<< >> TxTuneResult.residual_freq<< "\n"; >> cout<< " Spectrum Inverted: "<< >> (TxTuneResult.spectrum_inverted ? "true" : "false")<< "\n"; >> } >> else { >> cout<< "Failed to tune Tx.\n"; >> cout<< " Baseband Frequency: "<< >> TxTuneResult.baseband_freq<< "\n"; >> cout<< " DxC Frequency: "<< >> TxTuneResult.dxc_freq<< "\n"; >> cout<< " Residual Frequency: "<< >> TxTuneResult.residual_freq<< "\n"; >> cout<< " Spectrum Inverted: "<< >> (TxTuneResult.spectrum_inverted ? "true" : "false")<< "\n"; >> } >> cout<< "\n"; >> >> _______________________________________________ >> >> >From: Manav Seth [mailto:smartyma...@gmail.com >> <mailto:smartyma...@gmail.com>] >> >Sent: Thursday, 28 January 2010 3:29 PM >> >To: Ian Holland >> >Cc: discuss-gnuradio@gnu.org<mailto:discuss-gnuradio@gnu.org> >> >Subject: Re: [Discuss-gnuradio] Unable to tune Tx or Rx with > XCVR2450 >> on>USRP2 >> >> >Ya, its failing for me too...set_tx_center_freq is always > failing >> (though I>am writing my code in python).. >> >not able to find the cause... >> >> Have you been able to get any of the pre-written scripts (e.g. >> usrp2_fft.py or usrp_siggen.py) working? I can't even get those to > work. >> I tried usrp_siggen.py in verbose this morning and noticed again > it was >> unable to set the Tx frequency. Also, I think the error I had > mentioned >> above re usrp2_fft.py would be because the rx frequency couldn't > be set. >> >> I have tried two of the daughtercards on one USRP2, and one of > those two >> cards on the other USRP2, and still can't get it to set, though it >> worked fine using the same code for the BasicTx and BasicRx. >> >> >> >> >> >> >> >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
