I've pulled down GnuRadio, and it's pretty cool

At the moment I'm trying to understand how to use a vector source (0,0,0,1,=
1,1,0,0,0,...) and a multiply block to "gate" the signals, there's an error=
 I don't understand: Source IO size "80" does not match sink IO size "8".

But I have three sine sources and an adder, and "sinks" that show me FFT an=
d waterfall.

Looks like a pretty powerful tool to set up a consistent signal source that=
 I can then impair with noise etc so I can feed that to my DSP.


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