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122.88MHz device clock feedthrough to RF carrier

As shown in the picture, the device clock provided to AD9371, is modulated to RF carrier by -122.88MHz and +122.88MHz.

The configuration file is generated by TES default setup, therefore the -122.88MHz and +122.88MHz device clock should be suppressed by transmitting filter.

Please give me some suggestion to solve this issue,Thanks.

  • What is the LO frequency that you are using and what is the tone offset? If you change the sampling rate, is this spur frequency changing? Can you share with us the profile that you are using, so that we can load it into TES GUI and test?

    You can increase the dev_clk frequency if it falls inband or you can reject it using external filters if it falls out of band.