Hi all,

Making some tests I have found that my system (USRP + RFX900) transmits an 
important signal (it seems a tone) without any application running, just when I 
plug the power source it transmits this unwanted signal. I'm working at the 
GSM900 downlink frequency band (between 935 and 960 MHz) and the signal appears 
close to the upper side of this band, around 959,6 Mhz. 

My system makes an spectrum sensing for that band and it locates the present 
signals, so it produces an error because it detects this undesired signal 
generated by itself. Any idea of the problem? Any solution?

Thanks!
                                          
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