In message <[email protected]>, dated Sat, 7 Dec 2013, Derek Walton <[email protected]> writes:

In the meantime, can anyone make suggestions about what may cause this noise, besides parasitic oscillations/faulty parts, and what radiating mechanisms can be uninfluenced with the protection measures I took.

You **seem** to have covered all the angles, but we must conclude that you haven't. Are you QUITE sure about the absence of ambient? Will the chip makers proudly confirm that they 'improved' on or more of the devices? Did you try another spectrum analyser?
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

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