[Discuss-gnuradio] Sensing behavior

[Catalin Lacatus]

Hello,

Running usrp_spectrum_sense.py I didn’t find some explications to the algorithm 
behavior.
For example, I am using an usrp to transmit a 400Hz tone on 6 MHz. 
With the other USRP I am sensing the band 4.5MHz to 13.5MHz.  
I found the presence of signal at 6Mhz (the correct one) and also at 9MHz (a residual one). 
Any idea what the 9MHz residual signal represents? It seems that the 9MHz signal 
is not an aliasing problem. Any solution to remove it?

Thank you,

Catalin