What Does ATX Analyze to Generate Tones?

[sborowko]

Does anyone here know what the ATX is actually measuring when it generates low-high and high-low tones? Since it is a PI machine and operates on a completely different principle from VLF machines, I'm wondering what it is measuring to generate these tones (Conductivity? Magnetic susceptibility?) How is it getting this info out of a pulse (not VLF) return? Is it looking at response time lag/decay time? Return pulse spreading? Some kind of return frequency content/Fourier analysis?

 

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[Terry Soloman]

Pulse decay differs in low / high conductive metals.

 

[sborowko]

Thanks Terry, I learn a little more each day!