[Discuss-gnuradio] USRP - underflow / overflow problem

[Narayanan, Sivaramasubramanian (R&T)]

Hi,

 

I am using the USRP board with two Basic Tx boards in both the Tx slots. I am also using both the Rx slots with Basic Tx on A side and TVRX on B side.

 

I am using Tx side interpolation rate as 400 and Rx side decimation rate as 250.

 

I am using a GUI with one button control to enable the Tx board and also a scopesink to plot the received waveform. I am using NBFM Tx/Rx blocks, filter blocks etc. I am using both the Tx and Rx parallely with each Tx/Rx pair tuned to different frequency (100 MHz and 150Mhz)

 

As soon as I run the program, I get messages like

 

uUuUuUuUuUuUuUuUuUuUuUuUuUuOuOuUuOuUuOuOuUuUuOuUuUuOuOuOuUuUuUuUuUuUuUuUuUuUuUuU
uUuUuUuUuUuUuUuUuUuUuUuUuUuUuUuUuUuUuUuOuOuUuUuUuOuOuUuUuUuUuUuUuUuOuOuUuUuOuUuO
uOuUuUuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuUuUuUuUuUuUuOuU
uUuOuUuUuOuUuUuUuUuUuUuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuOuO.

 

Please let me know what goes wrong and how to get rid of this problem.

 

Thanks and Regards,

Sivaram