Got some great feedback from the community about fixing our EMI problem. In summary:
- Try Lifting the USB’s ground on one side or the other.
- The last faraday cage we use was likely steel, which can have enough resistance to pass radio frequency. Try aluminum faraday cage.
- Use USB cable with ferrite bead like this one Dave purchased:
I have an electronics chassis I’ve recycled to try as the next faraday cage: