Hi Team,
We have Developed the 10BASE-T1L Field Device with Class 0 SPoE Module and for the power extraction we have used same component used in the CN0575 Development Board and then I sent the whole thing to an accredited EMC lab and it failed in radiated emission. See the attached captured images.
Currently we are seeing three key noise signals that we are focusing our attention on
1.SPI Clock Line
2. MSD1278T-224KLD -Coupled Inductor
3.Additional signals at 111 MHz and 143MHz
What modifications are needed in the design to get lower radiated emission?
Any help is appreciated