DDS Spurs - RadioBanter

February 25th 16, 11:14 PM posted to rec.radio.amateur.moderated

rickman

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First recorded activity by RadioBanter: Nov 2012

Posts: 989

DDS Spurs

I'm considering building a DDS to use as a VFO. I've heard of concerns
about the close in spurs which can be a problem. However, I think I can
address the close in spurs caused by phase quantization. I should be
able to get those to the -120 dB ballpark. The spurs caused by
amplitude quantization would limited by the DAC which will be a lot
worse for higher sample rates. But -96 dB ballpark is not inconceivable.

--

Rick

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