> It's the rise/fall time of the signal edges that causes the radiated EMI
> and
> ringing, not the frequency of the signal. However, from a practical
> standpoint, it is unlikely that the Tx/Rx ouputs have fast enough edges to
> cause a significant problem.


I had this happen on a design once, radiated plenty of energy around 162
MHz.
Pegged the meter at FCC testing.  Somewhat embarrasing.
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