Hello,
I am a beginner with USRP. Please help with my problem.
Please see the attached two pictures captured by a spectrum analyzer. In
usrp1_64MHz_harmonic.JPG, I just powered up the motherboard without any
daughterboard. I guess the harmonics comes from the fact that we have 64MHz
ADC. In rxf400_4MHz_harmonic.JPG, I transmit ofdm signal at 420MHz using
daughterboard RXF400. Beside the 64MHz harmonic coupling with the
transmit signal, I also see the 4MHz harmonics.
Do you know why these happen and how to mitigate them? I appreciate your
answers.
Thank you,
Quoc
usrp1_64MHz_harmonic.GIF
rxf400_4MHz_harmonic.GIF