ETTUS N210 spurious

[Fabien PELLET]

Hello,

When I put a signal generator that produces a sinwave at 1Khz and that 
feeds an USRP Sink with a frequency center at 12MHz for example, I got 
spurs at +/-32Khz, +/-64KHz and +/-96KHz at the output of my N210 (used 
with LFTX and LFRX). Whatever the frequency center of the USRP and the 
frequency of the baseband signal, I have to spurs around -70dBc.

Any idea on where it could come from ? Hardware EMC problem ? Digital 
treatment issue ? How to solve it ?

Best regards,

Fabien, F4CTZ