[LAD] Smallest, simplest, silliest SDR?

[Gordon JC Pearce]

On Sun, 2010-02-28 at 01:41 +0100, fons at kokkinizita.net wrote:
> On Sun, Feb 28, 2010 at 12:40:00AM +0000, Gordon JC Pearce wrote:
> 
> > I wanted a very simple SDR with jack inputs and outputs for a
> > demonstration I was doing.  I had a look at the DSP guts of dttsp and
> > quisk, and sat down to code.
> 
> Forgive my ignorance, but what is an SDR ?

Software-Defined Radio.  Basically you downmix incoming RF to the audio
range with two mixers fed 90 degrees out of phase.  You can then munge
this in various different ways to tune and demodulate various different
radio signals.

Gordon MM0YEQ