FM modulation with usrp-2900

[Andrei_Babaev]

Hello everyone!
I am quite new to SDR and decided to start with a simple project with. I am trying to transmit frequency modulated signal with first channel of usrp 2900 and receive it with the second. I have written some code using modulation toolkit but I can't make it work. My program is able to rebuild the transmitted waveform, but amplitude and frequency parameters stay wrong, no matter what input parameters I set (picture 1 is transmitted waveform, picture 2 is received waveform). Kindly guide me what am I doing wrong, thanks in advance

receiver

 

[谭家易]

Hi

You could run: C:\Program Files (x86)\National Instruments\LabVIEW 2019\examples\instr\niUSRP\ModulationToolkitExamples\niUSRP EX FM Demod Sound Card (Queue).vi

This VI is FM demodulation