2022-01-31 02:27 AM
2022-01-31 02:29 AM
You could start by posting some captures of your pcb design.
Which EMI compliance test are you failing?
2022-01-31 02:37 AM
2022-01-31 03:12 AM
How many layers did you used in pcb? Do you have a solid ground plane under signals?
2022-01-31 03:30 AM
I am using 6 Layers build as follow:
Yes Layer 2 is filled completely with GND Polygon
2022-02-02 12:44 AM
6 layer PCB is way out of my leage, i hope someone else can help.
Do you have any hint about where the problem could be?
I dont see any GND via stiching ,is that intentional?
Do you have any high speed buses/power switches/radios/ LED or motor driver/ in your board?
Did you split ground planes?
2022-02-03 01:52 AM
Hi,
Any Hint: The data send to the transceiver are with 800kHz oder 4MHz and this data is converter to a dfferential signal which is send through the ethernet connector RJ45. This noise is coming from this send path. I thought may be adding a serial capacitor at the termination resistor may help solve the problem, any idea?
The data send from the µC to the transceiver and from Transceiver to RJ45 is for LED control which as stated control with either 800kHz or 4MHz.
I will be delighted for your feedback