Reducing Harmonic Distortion on B205mini

[Trey]

 

I'm using a B205mini to transmit signals. When transmitting, I can see copies of the the SOI at harmonics of the center frequency. I ran some measurements of total harmonic distortion, and found it to range from 39% with a 100MHz to 23% with a 1GHz carrier. 

My main concern is for the lower frequency carriers, like 100MHz, because multiple harmonics will show up on a spectrum analyzer set to a wideband. I've looked at putting an RF filter at the output, but I need the system to be able to switch transmit center frequencies in a range from 100MHz to 5GHz.

Is it possible to reduce the harmonics by some hardware setting (driving with gnruadio)? 

Thanks,
Trey

 

[JColvin]

Hi @Trey,

I have been recommended by the Ettus team that support questions regarding Ettus products should be directed to the their mailing lists, https://kb.ettus.com/Mailing_Lists, where Ettus Research engineers, Ettus support, and customers themselves have been active for the last 10+ years.

If anything, this will at least reduce the time it takes for you to receive an accurate response since the Digilent staff will end up reaching out to the Ettus team about your query and relaying the answer back to you.

Thanks,
JColvin

[Trey]

Hi @JColvin, 

Thanks, I'll do that.

-Trey