About five years ago I got a product CE tested for $7500. The testing house provided advice, and they retested until it passed as part of the upfront cost. It passed on the second attempt (barely). Since, I've read "High-Speed Digital Design: A handbook of black magic" several times until I mostly got it and I probably won't have nearly as much trouble in the future. I highly recommend the book.

About five years ago I got a product CE tested for $7500. The testing house provided advice, and they retested until it passed as part of the upfront cost. It passed on the second attempt (barely). Since, I've read High-Speed Digital Design: A handbook of black magic several times until I mostly got it and I probably won't have nearly as much trouble in the future. I highly recommend the book.