On Sun, 26 Jun 2011 14:54:48 -0400
gene heskett wrote:
> I do not see how a repeatable, and therefore measurable quadrature
Really? Because I'm generating some quadrature samples right now - they're how software-defined radios work. In this case you generate two local oscillators 90 degrees apart and use them to switch a pair of synchronous detectors. The resulting downmixed RF is now at audio frequencies (just like a direct-conversion receiver) and can be passed to a soundcard, then processed on the PC to extract a particular signal.
See https://github.com/gordonjcp/lysdr if you want to play.
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