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Re: Question about the sensitivity readout...Rain check Steve...matt
Posted by: metalpopper
Date: November 30, 2017 08:17PM



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Re: Question about the sensitivity readout...
Posted by: Jason in Enid
Date: November 30, 2017 09:04PM
No metalpopper, you are incorrect

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Re: Question about the sensitivity readout...
Posted by: sgoss66
Date: November 30, 2017 09:47PM
Matt --

That is not it. When that picture was taken, my manual sensitivity was set at "30." If I switched to manual, that 28 changed to "30" -- in other words, it would change immediately to show that I was then at manual 30. However, even doing so (switching to manual 30), the green number (suggested sensitivity) remained at 20. Additionally, if I moved to a different location and the green number went down to, say, 18, the white number (the sensitivity number the machine was currently running) would likewise go down a digit or two, to 26 or 27. The white number is DEFINITELY the value of sensitivity that the machine is currently running at -- whether in auto, auto+3, manual, whatever the case.

So, since I was in auto +3 at that point, we can conclude that the machine was "wanting" to run at 25, such that if I was running regular auto, with no "+", it WOULD have been running at 25. But running at auto +3 had it thus running at 28.

Steve



Minelab CTX 3030
Minelab Equinox 800
Garrett ProPointer AT
Lesche hand digger
Lesche 38D Ground Shark "King of Spades"

Norman, OK

Re: Question about the sensitivity readout...
Posted by: IDXMonster
Date: November 30, 2017 09:51PM
Steve-
The machine is measuring the ground on 3 channels...hi,med,low
The white number on the left is your running number...either the Manual level you have set or the highest of the 3 channels. Lets say...
Channel 1 is running 20
Channel 2 is running 22
Channel 3 is running 24
The average is 22. This is your green number,your suggested sensitivty.
When in Auto,for a readout it will use the highest of those 3 channels,24.
In Auto +3 the white number would read 27. The green number would be 22.
Sometimes the hi,med and low channels are further apart,depending on conditions. Such as....
Channel 1 is running 20
Channel 2 is running 25
Channel 3 is running 15
The average is 20,again,your suggested sensitivty number in green.
You can now see how the running(white) and green(suggested) could be 8 points apart. Because it’s using the highest of the 3 channels as a readout which is the mid channel at 25,adding the “+3” causes it to be at 28.
When you choose Manual sensitivty all of the 3 channels are commanded to that value. This can be detrimental to not only your ability to hear real targets amid the ground noise,but also the machines ability to electronically sort the “wheat from the chaff” and report real targets with any kind of accuracy.
In very clean black dirt or straight sand is where I might give Manual sensitivty a try,IMHO.
Clear as mud?:smile:

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Re: Question about the sensitivity readout...
Posted by: sgoss66
Date: November 30, 2017 09:59PM
NO, IDX. Very clear, actually.

Where did you learn that part about how the machine is using "three channels" to test the ground, and the average is the "suggested sensitivity" -- the green number? I did not know that...very good stuff, right there.

Steve



Minelab CTX 3030
Minelab Equinox 800
Garrett ProPointer AT
Lesche hand digger
Lesche 38D Ground Shark "King of Spades"

Norman, OK

Re: Question about the sensitivity readout...
Posted by: IDXMonster
Date: November 30, 2017 10:07PM
Steve,it was explained in a couple of posts by Randy Horton and Johnny Anglo a while back. Since my copy and paste skills absolutely stink,I had to recite it from memory. Even though I wish the CTX had an analytics screen so I could see for myself where the individual channels are running,it wouldn’t do me any real world good with the controls we are given. This is where we have to trust what Minelab has designed,and with good faith earned from prior machines, we can.

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Re: Question about the sensitivity readout...
Posted by: sgoss66
Date: November 30, 2017 10:40PM
Gotcha. THANKS, my friend!

Steve



Minelab CTX 3030
Minelab Equinox 800
Garrett ProPointer AT
Lesche hand digger
Lesche 38D Ground Shark "King of Spades"

Norman, OK

Re: Question about the sensitivity readout...
Posted by: JackalopeZL1
Date: November 30, 2017 11:28PM
Quote
IDXMonster

When you choose Manual sensitivty all of the 3 channels are commanded to that value. This can be detrimental to not only your ability to hear real targets amid the ground noise,but also the machines ability to electronically sort the “wheat from the chaff” and report real targets with any kind of accuracy.
In very clean black dirt or straight sand is where I might give Manual sensitivty a try,IMHO.
Clear as mud?:smile:

Good read there on how the sensitivity works IDX! But without just trying to start a argument I have to completely disagree with the manual sensitivity being "detrimental" and not being able to hear good targets. I run my CTX in very bad ground every hunt and have for well over 1000 hrs., I almost always run in manual finding good targets that absolutely will not even break threshold in auto. I even had a deep wheat last week that did just that at 8".(pic of what it ran in auto) In manual 27 the wheat was a good clean high tone and when I switched to auto it would only null threshold(TH set at 16). I do this with almost every deep target and have actually documented this hundreds of times.

I have heard these analogies, "It is like running your high beams in fog, you can't hear the good targets" or "the ground will null out your machine and you won't hear good targets" I haven't seen this at all.

Even in relatively clean ground back in NJ I dug a 14" DB large cent that would not break threshold at all in auto. I could go through many more examples but the only down falls I have found to running in Manual is you absolutely will deal with more falses with iron and sometimes on shallower targets you will not get a screen ID, but the sweet tone is ALWAYS there on those real targets. I do have times I will go to auto to get a ID on targets if shallow when this happens..

One thing this has done for me, It indeed helps your brain be the discriminator it should be, you learn to decipher good targets from bad in short order with these falses. The falses are a side effect I have no issue dealing with and even doing so I have found this to not be that much more than in auto, and indeed less than any other machine I have had. I absolutely would not have dug many of my best finds in Auto around my area.

In clean ground running manual may not be for you but you could be surprised what you may find if you try it for a while. I would love to have ground that in Auto I could dig that 9" dime. It will not happen often where I do it with manual regularly.

Here is a shot of my normal auto screen in my Wonderful goldrush areas!! And either way keep having fun hunting!! And the CTX rocks!!



Edited 1 time(s). Last edit at 11/30/2017 11:41PM by JackalopeZL1.




Re: Question about the sensitivity readout...
Posted by: IDXMonster
Date: December 01, 2017 01:02AM
Yep,there must be a wide variety of ground conditions. I’ve never witnessed what you’re describing or even come close. Basically no target that registers in Auto will ever come in better in Manual,and often times it’s worse. Big coins will always hit better but if you’ll never dig a 9” Dime then Manual likely IS the better choice. I’ve just never seen it NOR have I seen a video example of it.

Re: Question about the sensitivity readout...
Posted by: IDXMonster
Date: December 01, 2017 07:28AM
Jackalope ,one thing I didn’t consider...are you running in Combined or in 50 CO? I read your part that said “the sweet tone is always there”. In Combined it’s just reporting one tone per bin,which may be where my downfall is regarding Manual. All the falsing AND the high bin tone are impossible to distinguish from one another for my ears,but with 50 CO perhaps that’s easier to interpret?

Re: Question about the sensitivity readout...
Posted by: JackalopeZL1
Date: December 01, 2017 08:07AM
No I only run combined. Hate 50 co :)

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Re: Question about the sensitivity readout...
Posted by: sgoss66
Date: December 01, 2017 08:47AM
Wow, guys. I LIKE convective multitones! Probably because I'm coming from an Explorer and that's the way I hunted the Explorer, so it feels "homey" to me! :) I DO have another mode, programmed to my user button, that is running "combined" -- and I switch over to it to listen every time I hit a potentially good target, but so far my normal hunt mode is multi-tone. I LOVE running that full range of Minelab tones!

Steve



Minelab CTX 3030
Minelab Equinox 800
Garrett ProPointer AT
Lesche hand digger
Lesche 38D Ground Shark "King of Spades"

Norman, OK

Re: Question about the sensitivity readout...
Posted by: JackalopeZL1
Date: December 01, 2017 09:15AM
You are crazy!! LoL

No I am glad it has it. I even use a 50 co confirming program to switch over to. I love the simplicity of the 4 co tones and 1 iron or low tone. A little less for my ears to comprehend. Can't wait to get out this weekend if I remember and I have a deep target I will try to video.. I feel a Old silver in my near future :) maybe text worthy. So have your phone ready. hahaha



Edited 1 time(s). Last edit at 12/01/2017 09:19AM by JackalopeZL1.

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Re: Question about the sensitivity readout...
Posted by: sgoss66
Date: December 01, 2017 10:10AM
Jackalope --

Good luck! I will look for a video of old silver!

As for the multi-tones, I just really got used to it from all of those years swinging the Explorers. I LIKE combined, but just getting one flat, non-nuanced tone for a "bin," containing a whole bunch of CO numbers, seems to be "wasting" just a bit of the audio capability of the unit. BUT, that said, it's really nice "hearing" the iron...

You know what I'd REALLY love? A combined option where you could run the full MULTI-TONES above your FE bin. Now THAT would be MOST awesome!!!

Steve



Minelab CTX 3030
Minelab Equinox 800
Garrett ProPointer AT
Lesche hand digger
Lesche 38D Ground Shark "King of Spades"

Norman, OK

Re: Question about the sensitivity readout...
Posted by: JackalopeZL1
Date: December 01, 2017 10:19AM
Maybe that could be a software update? I like options :) We should write minelab engineers with your suggestion..

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