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Why do I get tons of positive vdi numbers in the red and rejected?

D

DavefromCt

New member
I notice that with my other white's units if it was a rejected target it would give me negative numbers but on this one, for instance, in coin mode (or any other mode) I get +83 colored red....why doesn't it say -83 like it should, and should I be digging red numbers?...I thought they represented rejected targets.....very frustrating!
 
Something doesn't sound right. Did you make changes in the program like color or discrimination. I would reset the program to factory original and see what happens.
 
That's one of the first things I did, is restore the programs to factory...it's really confusing me...if I'm in coin or coin and jewelry mode, high numbers like 75, 83, etc. should always be green I thought!
 
I know what you mean Dave, Mine does that from time to time. I just take it as heavy iron. I have dug those before and it turned out to be iron. Mine will give a good solid tone and a +83 but the band will show up red but it will also jump sometimes into the - range. It is frustrating but I have learned to ignore it. Maybe one of the techs could tell us why this happens sometimes. I have had this happen on more than one vision and in the stock programs mode.
 
Thanks...it's nice to know some others are experiencing this. You may be right...the key is probably to just ignore it!
 
Dave, If you have access to a 5.3 or 9.5 concentric coil, give one of them a try. The D2 coil is wonderful, but it loves iron! You will get signals constantly from iron scrap. The concentrics will not respond to the bottlecaps, iron scraps or nails like the DD's do. If ypu have a DFX, MXT,or M6 try swapping the 9.5 coil with your V3. I think your VDI #'s will be more to your liking.
John London
 
Yes it happened to me to it seems to maybe be a little bug because its usually +83 that does it. It did to me on a quarter solid red bar with a +83. I have also heard the software updates are up to 1.3 maybe it addresses this problem.
 
I've been trying to reproduce this without any success. Can those of you that see this verify that I am reading this correctly?

Are you seeing a spectragraph line at +83 that is colored red as well as the VDI number displayed being +83? (This is how I read the posts and what I have not ever had happen to me)

-or-

Are you seeing a VDI number displayed of +83 and the spectragraph red line is in a different region of the spectragraph (in a rejected region)?

Thanks

Anne
 
I see the + 83 and I get the good tone with it and when I look at the spectrograph, it has a red bar in the -83 range
 
Thanks for your reply Magic,

That's what I expected to hear.

Do you have the spectragraph configured to show intensity or consistency?

If you have the spectragraph set up for intensity and you have a very large piece of iron, it will overwhelm a quarter (or other coin). The Spectragraph showing the strength (intensity) of the signal is the default value. Iron has a tendency to also show up all over the spectrum, so there will be times when it reads as a rejected target as well as an accepted target. If you have a fast enough recovery delay, a large chunk of iron may have some ripple effects that extend beyond the decay timing and one of the ripples will then be seen as a new target. If that new ripple reads as an accepted target, the VDI # will be displayed but the signal will be small enough to not register on the spectragraph because the intensity of the iron at its peak is so overwhelmingly large. Other possibilities exist - mostly a large signal will be large enough to prevent the smaller signals from showing up on the spectragraph - they're still there, just not enough resolution with the eyes or the pixels to see them compared to the large signal.

Or you may actually have a coin buried with that large chunk of iron. I have a pair of metal scissors. I ran the scissors and a quarter across the loop. The signal from the scissors was so large that the signal from the quarter wasn't able to show up on the spectragraph - it was just too small, but I still saw the +83 VDI # displayed.

I personally like intensity better, but if this is a problem while hunting, trying out the consistency setting might be an option. It shows a lot more scatter from ground effects though. But, you are much more likely to see a coin buried with a large chunk of iron too. (Expert menu/configure/Live search screen/search/spectragraph/consistency) Even with consistency, a large chunk of iron may still overwhelm the signal for a coin, but I was able to see my quarter most of the time when I ran the scissors and quarter across (not one on top of the other - the scissors did have a very large influence on the VDI reading). Depending on the ground, consistency may be unusable though.
 
Just thinking about this, If you have visual disc off as in some factory programs you may get a positve 83 but no spectragraph block. (This happened alot on my DFX). Now as v3 displays all 3 frequency info what you may be seeing is the rejected info of the other two frequencies. Try correlate next time this happens to see if it supresses it. Iron is typical of this high VDI to negative VDI swing. Might not be a bug just another way v3 is telling you it's trash.
 
DELTA196 said:
Just thinking about this, If you have visual disc off as in some factory programs you may get a positve 83 but no spectragraph block. (This happened alot on my DFX). Now as v3 displays all 3 frequency info what you may be seeing is the rejected info of the other two frequencies. Try correlate next time this happens to see if it supresses it. Iron is typical of this high VDI to negative VDI swing. Might not be a bug just another way v3 is telling you it's trash.
Click to expand...

Visual reject on the V only affects the display of the VDI #. The spectragraph is showing all information whether the target is rejected or accepted (at least all that it can). If Visual reject is enabled, the VDI #'s for rejected targets will not be displayed. If it is disabled, all VDI #'s are displayed (rejected and accepted).
 
ak_1234 said:
Thanks for your reply Magic,

That's what I expected to hear.

Do you have the spectragraph configured to show intensity or consistency?

If you have the spectragraph set up for intensity and you have a very large piece of iron, it will overwhelm a quarter (or other coin). The Spectragraph showing the strength (intensity) of the signal is the default value. Iron has a tendency to also show up all over the spectrum, so there will be times when it reads as a rejected target as well as an accepted target. If you have a fast enough recovery delay, a large chunk of iron may have some ripple effects that extend beyond the decay timing and one of the ripples will then be seen as a new target. If that new ripple reads as an accepted target, the VDI # will be displayed but the signal will be small enough to not register on the spectragraph because the intensity of the iron at its peak is so overwhelmingly large. Other possibilities exist - mostly a large signal will be large enough to prevent the smaller signals from showing up on the spectragraph - they're still there, just not enough resolution with the eyes or the pixels to see them compared to the large signal.

Or you may actually have a coin buried with that large chunk of iron. I have a pair of metal scissors. I ran the scissors and a quarter across the loop. The signal from the scissors was so large that the signal from the quarter wasn't able to show up on the spectragraph - it was just too small, but I still saw the +83 VDI # displayed.

I personally like intensity better, but if this is a problem while hunting, trying out the consistency setting might be an option. It shows a lot more scatter from ground effects though. But, you are much more likely to see a coin buried with a large chunk of iron too. (Expert menu/configure/Live search screen/search/spectragraph/consistency) Even with consistency, a large chunk of iron may still overwhelm the signal for a coin, but I was able to see my quarter most of the time when I ran the scissors and quarter across (not one on top of the other - the scissors did have a very large influence on the VDI reading). Depending on the ground, consistency may be unusable though.
Click to expand...

Thank you for your reply, That does make sense to me. Hopefully, this will be added to a book at a later date for better explanation on the V3.
Thanks again for explaining!
 
Thanks everyone for the very informative comments. I think what I'll do is mainly trust the signagraph and not so much the numbers. The large red bar in fact did appear in a rejected area so that should alert me to the fact that it's probably iron.
 
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