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Book Exerpt: "Automatic Sensitivity"

C

cjc

Active member
19/ Automatic Sensitivity
When and how to use automatic sensitivity is for sure the most common question that new Sovereign users ask, and there is a lot to be learned from how this feature works. At first glance, the machine seems easier to use in auto. There is less nulling as you increase your sweep speed and less need for good coil control. What auto sens does is to run the machine through a range of settings as it encounters the ground. It then settles on the range which is performing best at getting a target in that ground. Unlike a single setting, some of these will be too low and not bring up targets. Some will also be too high and cause the ground to overpower targets. The plus side is that these multiple settings will act to saturate the ground reasonably well to give the detector stable smooth operation.
In manual sensitivity, it
 
Interesting. What do you think Sens actually is? Is it output power of the TX or amplification of the RX signal?

It sounds like he is saying the Auto Sens continually updates based on what is coming back up through the coil. I'm not sure of what the physics of that means.

I have a related question for All Metal searching.

One of the features on the GT is "accu-track" which in All Metal will re-ground balance the detector as you go.

What did previous Sovereigns do? Obviously they didn't continually reground because you can scan over a faint signal as much as you like and it won't be ground balanced away. Did they also re-ground but not as often? Or did they set ground once as they went into All Metal? Or were they fixed ground in All Metal?
 
More into the practical side of detecting that the tech, but I think that this is what multi fq does--it allows smooth operation over changing ground by way of EM saturation--there's no need for a changing setpoint, although it gives more precision as with the GT.
clive
 
"Finding Gold, Silver and Coins with the Minelab Sovereign and Excalibur Metal Detectors" 2006 by Clive James Clynick

Would Clive James Clynick be user cjc?

If so, how can I get a copy of your book?

del
 
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