RX DC Offset

Hello,

I am trying to receive a signal using LMS API c++ library. Whenever I plot the samples I received, there is always a random DC offset occurring somewhere randomly. I tried to calibrate RX as well but no help although the calibration finishes successfully. Any thoughts on this?

Screen Shot 2021-04-08 at 17.37.43

Screen Shot 2021-04-08 at 17.35.32

Screen Shot 2021-04-08 at 17.37.34

Thank you in advance,
Ugur.