Re: [Discuss-gnuradio] Unable to tune Tx or Rx with XCVR2450 on USRP2

[Manav Seth]

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...

On Wed, Jan 27, 2010 at 8:52 PM, Ian Holland <address@hidden> 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";

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