On Sun, July 8, 2012 1:02 am, Peter P. wrote:
> I asked here before but my email went to the bit bucket somehow. Do peopl=
e
> consider using an ISM band clock xtal in an attempt to move all/most self
> generated harmonics out of normal radio bands? This is more for keeping
> radiated noise out of one's own project than for passing RFI emissions
> conformance testing.

I really doubt it would make much difference- your effort is better spent
doing good layout- watching where the return current flows, short current
paths, etc. Self noise and harmonics are really hard to predict- while
*most* are at at a small integral multiple of the fundamental, they can
interact, and  go all over the place.  If you are doing a radio where the
fundamental is right on the crystal's frequency, it might make a bit of a
difference, but no matter what, good signal integrity will be the key to
the best performance.

Matt Bennett
Just outside of Austin, TX
30.51,-97.91

The views I express are my own, not that of my employer, a large
multinational corporation that you are familiar with.
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