WIZ750SR-100 radiated emissions

Dear all,

We designed a PCB board in which WIZ750SR-100 fits.
While doing an radiated emission test we saw a big spike at 57MHz and its harmonics (114 MHz and 171MHz).

Is something inside the WIZ750SR-100 working at 57MHz?

The emission came from other electronics. Nothing to do with Wiznet

Hi, @jmiguelg.
Thank you for the feedback.
If you have any other questions, please leave a post on the forum.