Yikes - why even mention the E and B fields? They aren't relevant to the rest of the article.

A few hours playing with Sine and Cosine generators in GNU radio can take you from book knowledge of I/Q complex signals into fully grokking it. You don't even need a radio, just your existing audio I/O.

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dsp_man 4 days ago | parent | next [-]

I mentioned E and B fields so that the reader knows why we focus exclusively on sinusoids. Plus, linking the sinusoid to something we see in physics makes it more real.

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ygritte 4 days ago | parent | prev [-]

> existing audio I/O

I never knew there even is such a thing. Where can I find it?

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galangalalgol 4 days ago | parent [-]

There is a source block for your mic and or audio in. That was one of the first things I played with to understand sdr. I remember seeing a strong tone on a waterfall plot that I could not hear, thinking it was an articfact, then looking at the frequency and realizing I wouldn't be able to hear it. Turned out it was a crt TV. That kind of dates the story. Fun to be had.

	▲	ygritte 3 days ago \| parent [-]
		Dang, I just realized that I misread it. I was seeing "I/Q" where it says "I/O". My bad.