little help... VDI %

[McMurphy]

Hi guys, quick question because I'm too sleepy after a 9 hour hunt to look at the manual.

Using V3i for 4 weeks now and loving the machine, something new I learn every hunt. Today I notice when using analyze you get a percentage. Is this the probability the machine thinks its symbols or VDI is correct? If so do you keep swinging until you get the best percentage before you call it

thanks in advance

 

[Larry (IL)]

Yes, it is another tool to help you to deside to dig or not but I would not rely on it. I would use the audio, signagraph, VDI and dominate frequency in that order to help you deside to dig. Then comes the other "tools" like analyze and %. I would suggest digging all interesting signals at first to get the feel for what the V3i is telling you and you will will quickly learn what is a good target or not.

 

[Rob (IL)]

There is no need to keep swinging to try to improve the % reading. If you get a low reading the detector is not sure of the target. If you get a high reading the detector is confident it knows what the target is. It would be low on a scale of whether I would dig or not dig.

 

[nw1886]

What Larry said doesn't mean that VDI % doesn't have it's place.....it's just that by the time "you" analyze the "big three", you usually have the info to dig or not. Since the beginning of detectors, audio is the one thing that we all get the most info from. It's the first info to us as alert and aspects of size,intensity,depth and influence from a possible adjacent targets can all be there in one neat little package. (That's a lot of info and it's the good stuff.)




Signagraph typically mirrors audio visually, can affirm and give you a visual "scratch pad" on what you are hearing, and it is also good for giving you an indication of you having your sensitivities balanced well or not, by red smearing in the iron range. (Think of it as audios side kick for more details and confirmation.)

VDI's and dominant frequency (when looked at together on an interesting target) is where the fun starts. As you learn, you'll see "patterns of predictability". Digging the targets that fall within predictable good range is what you mostly do but.....when anomalies show up that are not a typical "pairing" between a VDI range and a dominant frequency....... so much COOL stuff acts like this. (A higher percentage of this can be added value metals.)

I use look at VDI % when running into occasional can slaw patches and when getting those "flitters" of good VDI's on deep marginal targets. This info is important to me then.



You are definitely in the groove to fully enjoying this box. (We are ALL still learning and figuring out ways to shorten the distance between the computer in the box and the one between the ear muffs!) Fun project to have and it varies between us all....and..... when you get to point where you are enjoying the one between the "muffs".as much as the one in the box...........you have arrived!

 

[McMurphy]

smearing in the iron range
can slaw patches

Thanks to all, and please define these terms when you get a chance so I completely understand. Batttery is charged and i'm heading back out... LETS GET SOME !!!!

 

[Rob (IL)]

Can slaw is cutup aluminum cans. So can slaw patches are areas with a lot of can scraps.

This a screen with no smearing.
[attachment 202856 2011-06-29_144543.jpg]

This is smearing
[attachment 202857 2011-06-29_144448.jpg]

 

[McMurphy]

Yea, this is the kind of stuff I can't find in the manual About smearing, each horizontal line represents one of the 3 tracking freq's on this screen and I would think they would never agree and line up on any one target but apparently they can because I see it happening in the field.

 

[yazoo]

I might add also that even though there is smearing,if there is a good tone hid in the mix there might be a good target hid amongst the trash of the signal. Yazoo

 

[Larry (IL)]

The bars can line up because of the normalization option being turned on. The VDI should be the same or close to it on all three frequencies on a good target that is shallow. This will start to vary as the targets get deeper.