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First Session With Version 2


dan_h

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E600, 11" coil, Minelab wired headphones, Park1 and F2 at 2.  All default settings.  Found 2 clad quarters, 4 pennies, other metal scrap.  Steel bottle caps produced a choppy signal that included some chirps.  No mistaking the caps for good items.  Of course, not every ambiguous or choppy signal should be skipped.  The Guide recommends using all metal to take full advantage of F2 so I tried that for while.  Went back to discrim pattern to screen our  other junk items.  

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8 hours ago, FloridaSon said:

Good report. Wonder why ML recommends all metal when as you said other items need to be discriminated out too?

 

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Because the filter enhances the iron signal while minimizing the false signal to give you more certainty it is iron.  You can't hear that pronounced telltale iron grunt if it is disc'd out.

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Discrimination and iron bias are two filters that work in tandem.  Applying too much of any filter (disc or iron bias) always impacts performance in some way or another as there are no free lunches.  In the case of iron bias, too much and you will negate iron falsing but at the expense of possibly causing nearby non-ferrous to be masked.  If you outright try to disc out bottlecaps or aluminum tabs in the mid target ID range (e.g., 12 to 15), then you will most certainly also notch out nickels and gold rings that fall in that target ID region.  I like to minimize filtering (disc or otherwise) to the extent my brain does not get overloaded or fatigued by the constant chatter, so that invariably means dialing in some disc or perhaps even iron bias.  Since Equinox does not have a true all metal mode (there is always some signal processing going on under the hood) even when all discrimination filtering is removed, even iron bias at 0 (either FE=0 or F2=0) does some level of iron bias filtering, albeit low levels and also note that FE=0 and F2=0 do not "turn off" iron bias filtering and those "0" settings are not equivalent (see this post by Steve).  If you want to remove all iron bias filtering, your only alternative is to go to single frequency because the iron bias filter relies on the multi-frequency signal of Multi IQ.

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