USRP x300 Error: timed out waiting for consecutive locks on sensor "lo_locked"

[kevin22mf]

Hello everyone,

I got an usrp x300,  using a UHD command  "rx_samples_to_file "  to capture RF sample. The x300 worked normally many times, but now I get this error on  RX2 port of both RF A and RF B channels:

     Waiting for "lo_locked":_______
      Error: timed out waiting for consecutive locks on sensor "lo_locked"

I mainly use RF A channel on the x300 , when the error appeared, I changed  to the RF B channel,  it worked fine at first but then also got the same error. 

Is there anyone got the same error or has solution for this problem, please advice.

Thank you in advance