More depth and how to get it :)

[Chris(SoCenWI)]

One of the merits of the FBS 28 frequencies is that lower freqs are better at somethings and higher better at others. I'm guessing that they are looking at a low, mid and high frequency and adjusting the sensitivity of the circuitry picking up similar sensitivities accordingly.

Makes more sense than size.

Chris

 

[GraveDiggerMax-VaBch-Va]

n/t

 

[Beachcomber]

switches on the outside. In the past when I have had headphones with controls on the outside they kept getting turned or switched every time I would turn my head when hunting in the Winter with the hood up on my Parka. Never had a problem with the Deep Woods. Well see what happens later in the Winter with the Black Widows

HH

Beachcomber

 

[jbow]

n/t

 

[Doctorcoinz]

Forget e - mails when needing advice from places ,, it's SO easy for them to ignore you. I always get my answers by simply lifting the thing people forget to use - the 100 year old invention called the phone!. Many companies ignore e mails. Tried e mailing minelab once over a problem with no response from them , lifted the phone problem solved.

 

[Erik in NJ]

Yes, I think you are right....they are using 3 different circuits, posibly combined with different software for each, essentially yielding 3 different algorithms for determining sensitivity, then they are simply doing a floor() or min() or the three values, choosing the lowest or most conservative value as the overall sensitivity. The way I see it after reading the Minelab document, sensitivity is simply a type of "threshold" for reporting signals (remember the hardware is always seeing all targets, real and false) back to the user - the higher the sensitivity the more targets or all different signal sizes are reported to you via audio and on the screen, but also the more falsing as well. I suspect that when you set the sensitivity in manual too high, you get a fairly high false to real sigal ratio. This is my interpretation now.

 

[jbow]

knowing which channel is running highest when you're in auto and which is lowest might make a difference in how you set the sensitivity. Also understanding what ML means, exactly, by a large, medium, and small signal. Suppose you were looking for small jewelry at a bit of depth. Knowing how auto is actually setting the channels might help you decide whether it would be better to hunt in auto or manual. If you were hunting for something small and the small channel was lowest and the larger was higest... would that make a difference. In that case would it be better to use manual sensitivity, even if not set very high. I don't see any way to determine which channel is running high and low in auto. Maybe that is something that they can add to the next generation, and indicator of which channel is running highest and lowest in auto sens... or maybe it doesn't matter... I don't know.

What do you think?

J

 

[Erik in NJ]

By a large, medium, and small signal - they probably mean the amplitude of the signal that they are receiving off the target, so I'm assuming that a small signal could either be a small, shallow target or a deep larger target. There's probably a pre-defined threshold for each signal size.....interesting stuff. They probably have different circuits that do the analysis on targets that are divided into three categories. I'll have to read their answers again and mull it over - maybe send them some follow-up questions through you if you are going to follow up with them. I will say their lucid replies did remove the shroud of mystery surrounding a number of these questions.