Posted by Carl on 5/3/2008, 12:02 am, in reply to "Re: "buck shot at 6 inches"?"
64.12.116.13
Tom,
You can't compare a PI with a VLF this way. By varying the pulse delay you enable the machine to move from small, low conductors to high conductors. Unlike VLF single frequency machines that are low frequency (better on high conductors) or high frequency (better on low conductors), the PI responds to signal decay rates in targets. Varying the delay allows the PI to respond to longer/slower decay or faster/quick decay depending on whether the target is a high or low conductor. Perhaps someone who is familiar with PI operation could post a graph that will help people visualize how it works?
One of the challenges we face in switching from VLF to PI will be to understand how the technology is different. Although the boxes, knobs, coils, etc will look the same the technology will require us to think a little differently.
Carl
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