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Re: [Discuss-gnuradio] VGA-based DVB-T modulator


From: Daniel O'Connor
Subject: Re: [Discuss-gnuradio] VGA-based DVB-T modulator
Date: Tue, 14 Jun 2005 09:34:00 +0930
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On Tue, 14 Jun 2005 08:17, Johnathan Corgan wrote:
> 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.

There's a link on the page Seth sent..
http://www.erikyyy.de/tempest/

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
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