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Did anybody try to use Learn Mode to check local ground mineralization and at what sensitivity or stable threshold is enough to get maximum from the d

I have a lot of material on my disk and will dig it up. I have posted on this several times but don't recall which forum. I have done a lot of testing of the sensitity, audio gain, manual, semi-auto, ground noise and induced EMI and how they interact. It appears to me that the learn function is the least understood and used function of the detector for that reason.
HH, Cody
 
As mineraliztion differs from area to area and state to state...Idea is to set your threshold to your hearing, use the noise reduction to find which one works best and slowly raise your sensitivity and when it starts to affect you steady threhold has to be backed off. Must be done in manual as semi-auto will keep changing. Either we are reading a different manual or you have a better interpetation of the learn feature as thats not its purpose...Some fellows seem to e able to run in high twenties while other have an erratic machine trying to reach 20 so indeed it all comes down to your area..
 
I intended to say that in general the factory presets are very good with one exception. <span style="background-color:#ffff00;">The audio gain needs to be higher than 5 because the audio is modulated at 5 or below. The strengty of hte audio depends on the distance of the target to the coil which makes very deep targets had to hear. I think most folks could do just fine with this increased to between 8 to 10.</span>
My conclusions are that a lot of brute force is used to compensate for other settings. Audio gain is similar to preamp gain and will have a tremendous affect on the opperation compared to sensitivity <span style="background-color:#ffff00;">but we seem to go for sensitivity at maximum and then manual with the audio gain set lower. </span>
<STRONG>It is easy to see audio gain as having 32 sensitivity set points. Set audio gain first with the sensitivity at 16, the mid point, then go up or down on a target to see where depth is best in an area. It is important to keep the detector noise cancelled when we change sensitvity or audio gain. However, we can quickly find the best point that is site specific.</STRONG>
We equate maximum depth to soil minerals but this is only one variable. The external variable include the entire soil matrix and environmental conditions. The setting are also major variables as the have a dramaticaly change the overall way the detector respond to the external variables.
Minelab has done a great job of making all this very easy for us. I often think of how importnat it is to read the manual and follow the suggested process of learning the detector. The more I read the manual, test and use the detector the more I appreciate what an outstanding machine we have and what a great job they did with the manual.
<STRONG>Starting poit is factory presets and in my opinion the audio gain at no less than 8 for most soil minerals.</STRONG> We also fail to see that on most detector there is some way to adjsut for changing soil minerals with a control know or other setting. A major way this is done with the Explorer at different audio gain and sensitivity setting is with semi-auto.
It sounds like I promote semi-auto but really I don't. I do know that it plays a major function in that we can change other settings and semi-auto compensates for a changing soil matrix and other external variables and is very effective in doing so. The User's Manual points this out but we seem to go for manual sensititity at maximum as brute force way to try to get maximum depth.
Forgive me if I said much of this in the previous post as I am still doing the retirement years firt cup of coffee thing.
HH, Cody
 
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