How works semi auto sensitivity on explorers? :shrug:

[stasys]

after using year exceptionally manual sensitivity started to think why Minelab did automatic sensitivity? probably exist real good point in this, but absolutely dont understand how explorer decides to drop or add sensitivity? maybe how much target in second under coil? or something similar? it would be some simple logic if all iron discriminated and its not possible to hear how many targets we passing with coil, but if in TTF we can hear everything and decide how much to drop manually .
anybody can explain me this simple semiauto 90s. technology? Thanks Stasys

 

[Big Fang Coin Biter]

I think it works like this. Imagine that you are hunting with your thumb on the sensitivity button. As you come onto an area with lots of nulls, you set the sens lower until the threshold comes back most of the time. As you get out of the null area then the sens increases.

It is a good question on what would happen in say, ferrous tones with no discrimination. In that case I cannot say what would happen. Maybe it is the number of targets per sweep or something like that.

Anybody know for sure what happens?

HH - BF
PS your avatar scares me...

 

[Southwind]

I may be wrong but this is what I've understood to be the difference between manual and auto sensitivity.

In manual sensitivity all 3 frequencies are set at the same level. In auto the detector determines the optimum frequency and adjust that frequency to the highest suggested level but leaves the other 2 at a lower/minimum? level to improve stability.

My experience in my soil has been that auto +3 does a far better job than manual at any level. I run Manual 29 to check iffy signals, but I've noticed I ALWAYS get a better quality signal AND VDI reading when in auto. I have yet to fins one single signal, even ones on the very edge of the E-Tracs ability, that manual improved the signal.

 

[stasys]

-- moved topic --

 

[Hotcz70]

all who respond please make sure to stay on topic as to not confuse Explorer users with what they are learning.

I think this can be a good learning topic...but not when E-Trac settings or features are mentioned as to how auto sensitivity works on the Explorers.

The E-Trac and Explorers are two different machines...and this is an Explorer forum.

 

[D&P-OR]

Right on Bryce! -----Two different "animals"----more so in some areas than others.---------Del

 

[ohio fred]

If you set the auto to say 8 and find a coin at seven inches it will pick it up and you will hear it.Switch to manual 8 and you probably wont hear it till you reach manual 15 or 16,the explorer i believe in auto will adjust to ground if you under power it till it reaches 16 factory setting.So i believe if you are in a hot area that it is best to use manual 1 to 16 went hunting to actually hunt that area better.In auto in a hot area the machine is making adjustments to reach 16.were in manual from 1 to 16 it is going to be what you set it on.It must make adjustments after receiving the return signal.Iam just guessing waiting for expert answer .

 

[ohio fred]

In a hot area i would run manual up to 16 then in other areas i would switch back and forth between auto and manual,auto so machine runs smoother and manual to run a little hotter in area or to identify deep signal or iffy coin signal.I think auto cuts down on chatter in a lot of areas and give you a more steady threshold.Not sure not a engineer .I think running auto so it is smooth and increasing gain to hear a deeper coin.

 

[mickfin]

Southwind i thought the Explorers had 28 freqencies???? Mickfin, Thanks

 

[Big Fang Coin Biter]

n/t

 

[sgoss66]

I think southwind is at least "close" to being right. I'm a bit hazy on this myself, but I seem to remember reading this -- Andy's book, maybe?

Steve

 

[Larry (IL)]

The Explorer or any other detector can transmit a hundred frequencies Mick and that doesn't mean squat, it is how many that is being processed on the return signal that matters. To the best of my knowledge, the explorer is a dual frequency or three at the best, machine. It is how the received signal is being processed that sets Minelab apart from the others.