In SX Microcontrollers, SX/B Compiler and SX-Key Tool, davehein wrote:

High frequency RF signals to not travel well through earthen materials.  I recently used an RF transmitter to located a buried wire.  The wire is around 12" to 18" below the surface.  Initially, I tried a transmitter in the 400 MHz range, and I couldn't pick up a signal at all.  After doing some research I found that buried wire detectors normally operate in the AM radio band around 500 KHz to 1 MHz.  This frequency band works much better.
 

Adobe may allow more RF through than soil.  It seems like the only way to know for sure is to run a few tests.

 

Dave

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