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Question about the sensitivity readout...

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.
 
IDXMonster said:
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?:)
Click to expand...

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!!
 
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.
 
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?
 
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
 
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
 
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
 
I would love to somehow have iron false low! I guess it wouldn’t be a false then huh?:)
 
sgoss66 said:
Hey everyone...

Took my CTX out on its "maiden voyage" today. Let's just say I'm highly impressed. Very happy that a lot of the knowledge I gained about using Explorers over the past 7 years translates over pretty well to the CTX. First coin at my beaten-to-death park was a Sacagawea dollar; haven't dug one of those in ages and was a nice "inaugural" coin! Second, and last coin, was a 1920 wheat cent, perfectly vertical/on edge, at a measured 8" deep. There's a story to tell with that dig, but I'll do that later! ;) HIGHLY impressed with this machine...

Anyway, one thing I'm confused about...

Here is a screen picture from my CTX today.

[attachment 351797 sensitivityCTX.JPG]

I was running auto +3, as you can see. What I don't understand is the white and green numbers. I THOUGHT the white was the sensitivity I'm actually running, and the green was the suggested sensitivity. But, as you can see, the white number is saying "28" (which I am almost sure is the sensitivity the machine is currently running at), and yet the green number is saying "20" -- the "suggested sensitivity," right? The reason I am confused is, if the "suggested sensitivity" is 20, I would have thought "auto +3" would mean the machine would run at 23. But it's not, it's at 28.

Can anyone explain?

Steve
Click to expand...
Hi Steve,
The Green # is the suggested sensitivity, The large # on the left, if you are running manual it is the current sensitivity # that you set.In automatic Sensitivity it is the internal value that the detector is using.It depends if you are using auto or manual.
Jim
 
JackalopeZL1 said:
You could call it a false false..hahaha
Click to expand...

Great,now I hate them even more!:lol: It is weird,with my IDXPro which is a monotone machine it can be right next to a transformer and talking non-stop but I can still hear a coin in those conditions Regarding the CTX I should have said...”detrimental to ME”. Heavy on the “mental”...:)
 
Hey guys, here is a quick video showing manual vs auto. This is not as drastic (bad ground)as I find a lot but it indeed shows there is a much cleaner signal in manual. Ended up being a wheat.
Found a fake rolex today.. looked promising at first. :)


https://m.youtube.com/watch?v=1nInfA0JgF4
 
sprchng said:
Check out this ground reading
Click to expand...

you sir, have some VERY tough ground!!
 
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