Seth David Schoen wrote:
Someone proposed this a while ago, but Fabrice Bellard (who is also responsible for cool stuff like the tcc compiler, which lets you use C as a scripting language and lets the Linux kernel compile itself at boot time) has used a VGA card's DAC as an RF modulator to produce a valid DVB-T signal.
I sure wish I could remember where to find it, but I've seen demonstrated a program that would generate valid AM waveforms by displaying certain pictures on a video screen. You'd enter a target frequency (I think in the HF range) and choose a MIDI sound file, and it would "modulate" the CRT display to emit RFI at that frequency with the tones riding as AM modulation. Very spooky. It was a demonstration of the security hazards associated with CRT displays (TEMPEST stuff) in a very palpable way.
-Johnathan _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
