I mean, my understanding of the trials of TEMPEST were that it was designed to reproduce the image that was displayed on a screen at any given time rather than detect the use of TV receiver sets.
I understand that for the most part, the TV detector vans used a similar technique used to find cold war spies transmitting covertly - that is to say, broadcasting a specific frequency known to resonate with particular components of a receiver, and listen for the telltale high frequency squawk that was produced as a result of the receiver’s operation.
Advance in technology from the 80s onwards and the move to digital decoding all but fucked this technique.
I mean, my understanding of the trials of TEMPEST were that it was designed to reproduce the image that was displayed on a screen at any given time rather than detect the use of TV receiver sets.
I understand that for the most part, the TV detector vans used a similar technique used to find cold war spies transmitting covertly - that is to say, broadcasting a specific frequency known to resonate with particular components of a receiver, and listen for the telltale high frequency squawk that was produced as a result of the receiver’s operation.
Advance in technology from the 80s onwards and the move to digital decoding all but fucked this technique.