TempestSDR: Spying on Computer Monitors

 

TempestSDR Download

Once you have the TempestSDR software running you’ll want to load your SDR’s EXTio File.

Once you’ve started the software you’ll see the following interface.

From here it’s just a matter of locking on to your signal by entering the frequency and hitting the “AUT” button.
But how do you find that signal?

 

It is recommended to play a tempest video signal on the target pc, this will cause audible music to be heard within the signal when listened to using an SDR client such as SDR# when in AM mode.

An example of such a video is here: Tempest Video

Once you’ve found the strongest signal where you hear the audio enter it in the TempestSDR software and start fine tuning.