" But powerful software-defined radios (SDRs) can change from baby monitor to emergency services dispatcher or air traffic controller, just by loading and executing different software."
I think they must be referring to some of the RF*** modules that can be set to any frequency in a wide band, with AT commands, but of course you are still going to need the RF tuned circuits, so I dont think there would be a little box with switches marked "baby monitor" " emergency services dispatcher" or "air traffic controller " on the market soon :-)
They probably mean stuff like this:http://gnuradio.org/redmine/projects/gnuradio/wiki
Uh Uh I sound like a "whenwe" :-(
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