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.