chirper97
Sr. Member
- Mar 28, 2005
- 483
- 171
- Detector(s) used
- White's V3i, White's DFX 300, Garrett Infinium PI, Fisher CZ6A, Garrett Deepseeker and Groundhog ADS
- Primary Interest:
- All Treasure Hunting
DFX: Let's examine Jeff Foster's "Digging Deeper with the DFX"
I have 7 or so publications explaining how to get the most of the Whites DFX 300. I purchased my detector 5 years ago and have barely scratched the surface (no pun) with this incredible machine. In my recent perusals of these publications, Jeff Foster's "Digging Deeper with the DFX" http://www.fielddepth.com
stands head and shoulders above the rest. This thread is created with the goal of discussing Foster's book implications and real world application to treasure hunting. Foster writes with enthusiasm and demonstrates a deep understanding of the principles and practical utility of this machine.
I have read descriptions of ground filtering many times and it always seemed arcane and overly technical. Foster provides an easy to understand explanation and I now know why I am maintaining the sweep speed of the search coil. Here's a quote found on p. 54 of his book:
"GROUND FILTERING works by allowing only fast changing signals from the search coil to be processed by the DFX. This process is said to 'separate' the slower changing ground mineralization signal from the target signal. The effects of mineralization are minimized and an accurate VDI number of the target is obtained.
This concept of blocking slower changing signals while passing faster changing signals is key to understanding how GROUND FILTERING operates on the DFX. It is this principle that creates the motion requirement in 'Motion Mode.' The search coil must move, relative to the target, to create a fast changing signal. Because GROUND FILTERING works based on how fast a signal changes, it should be clear that the speed at which the search coil is moved past a target will have a significant impact on its performance."
I have 7 or so publications explaining how to get the most of the Whites DFX 300. I purchased my detector 5 years ago and have barely scratched the surface (no pun) with this incredible machine. In my recent perusals of these publications, Jeff Foster's "Digging Deeper with the DFX" http://www.fielddepth.com
stands head and shoulders above the rest. This thread is created with the goal of discussing Foster's book implications and real world application to treasure hunting. Foster writes with enthusiasm and demonstrates a deep understanding of the principles and practical utility of this machine.
I have read descriptions of ground filtering many times and it always seemed arcane and overly technical. Foster provides an easy to understand explanation and I now know why I am maintaining the sweep speed of the search coil. Here's a quote found on p. 54 of his book:
"GROUND FILTERING works by allowing only fast changing signals from the search coil to be processed by the DFX. This process is said to 'separate' the slower changing ground mineralization signal from the target signal. The effects of mineralization are minimized and an accurate VDI number of the target is obtained.
This concept of blocking slower changing signals while passing faster changing signals is key to understanding how GROUND FILTERING operates on the DFX. It is this principle that creates the motion requirement in 'Motion Mode.' The search coil must move, relative to the target, to create a fast changing signal. Because GROUND FILTERING works based on how fast a signal changes, it should be clear that the speed at which the search coil is moved past a target will have a significant impact on its performance."
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