[Discuss-gnuradio] USRP inserts a peak in the carrier frequency

[frankist]

Hi,

I am using GNU Radio for 2 weeks. I always get in the receiver side a signal
with a peak in the carrier frequency when I turn on the transmitter even if
I send a signal made of zeros. You can see it in the picture 
http://old.nabble.com/file/p33648622/usrp_carrier_peak.png 

In spite of being handy to discover the frequency offset of my signal, it is
influencing my results when I try to measure the power of the received
signal. I thought this was the DC offset, but I read somewhere that USRP2
eliminates the DC Offset.

So, do you know what it is and how to remove it?
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