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I noticed in the manual the Ground balance numbers have some meaning; this seems quite unusual for a SMF.

Typical Ground Balance Ranges:

80–99: Highly ferrous (magnetite, ferrous oxide minerals, black sands, hot rocks, terra cotta)

50–80: Moderately mineralized soils (red clay, brown clay, iron-bearing clay minerals, etc.)

30–50: Likely an iron object or moist, salty soil

0–30: Highly conductive, non-ferrous minerals such as saltwater

 

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That looks like the same Ground Balance number descriptions as in the AT Max manual.  Maybe they just carried over this part instead of any revision, or perhaps it did not need to be. 🤔

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The Iron Audio is interesting and plays multi-roles. It also sets the tone break and behaves differently depending on discrimination.

Also “Most importantly, Iron Audio will produce a very distinctive Low-High-Low response to flat iron objects like bottlecaps or steel washers that normally trick detectors by producing a good Target ID and tone.”

If you have zero discrimination and turn Iron Audio on, the Low-Tone is replaced with Low-Med-Tone.

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6 hours ago, IBMe said:

It also sets the tone break and behaves differently depending on discrimination.

Actually, the discrimination setting sets the low tone break.  Disc setting and iron audio on vs. off determines whether the lowest frequency tone is audible.  Whether tones are set to 3 or 5 also play a role on whether the second lowest audible tone is low-medium or medium.

See the applicable manual pages below.

(Note that the VX5 diagrams below apply to the VX7/9 when the VX7/9 are set to 3 tones).

Screenshot_20241121_212051_AdobeAcrobat.thumb.png.59b473882bf4c1ba7dd7ee4d4d9401f1.png

Screenshot_20241121_212103_AdobeAcrobat.thumb.png.bbddc168f9941e2de5f9ec9513d2eb5f.png

8 hours ago, Mike_Hillis said:

Any idea what the pixel size of the target ID curser means?    Pictures show small medium and large.   Couldn't find it in the manual.

I think it is target strength or intensity, could also be thought of as a confidence indication.

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