Hi Daniel, Which RF daughterboards are installed in your X310? It appears that your X310 motherboard isn't talking to any daughterboard. Rob
On Tue, Oct 14, 2025 at 3:05 PM Daniel Mayer <[email protected]> wrote: > Hello, > I am attempting to transmit with a USRP X310 using the 'tx_waveforms' > example (./tx_waveforms --rate 25e6 --freq 900e6 --gain 20), but a > SignalHound spectrum analyzer placed next to the transmitting antenna of > the USRP is not picking up any signal above the noise floor at that > frequency. The spectrum analyzer shows signals transmitted by other > devices, so it seems unlikely that the spectrum analyzer is broken. > > The text output of the example is as follows: > >> Setting TX Rate: 25.000000 Msps... >> Actual TX Rate: 25.000000 Msps... >> >> Setting TX Gain: 20.000000 dB... >> >> *Actual TX Gain: 0.000000 dB...* >> Setting device timestamp to 0... >> >> *[WARNING] [0/Radio#0] Attempting to set tick rate to 0. Skipping.*Setting >> TX Freq: 900.000000 MHz... >> Setting TX LO Offset: 0.000000 MHz... >> *Actual TX Freq: 0.000000 MHz...* > > I did notice that the 'Actual TX Gain' and 'Actual TX Freq' are both set > to 0; could this be a cause of the problem? > > For completeness, here are the configuration parameters that the example > prints out: > >> [INFO] [X300] Radio 1x clock: 200 MHz >> Using Device: Single USRP: >> Device: X-Series Device >> Mboard 0: X310 >> RX Channel: 0 >> RX DSP: 0 >> RX Dboard: A >> RX Subdev: Unknown (0xffff) - 0 >> RX Channel: 1 >> RX DSP: 1 >> RX Dboard: B >> RX Subdev: UBX RX >> TX Channel: 0 >> TX DSP: 0 >> TX Dboard: A >> TX Subdev: Unknown (0xffff) - 0 >> TX Channel: 1 >> TX DSP: 1 >> TX Dboard: B >> TX Subdev: UBX TX > > > Thanks for your help! > > Daniel Mayer > _______________________________________________ > USRP-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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