Could someone explain to me.....

[Digger]

OK, one more question on Threshold setting and target response. Having worked with andgates and orgates myself, I understand the theory that some of you have posted as to the target response being non-related to the threshold setting. That makes sense to me, in a digital "insert sound here" world. In testing this theory, regardless of where I have the Threshold set, I have not been able to "not hear" a target that is there. Target response seems to always over-ride the threshold (or lack of threshold) that I have established. That further indicates that the threshold audio is a separate signal process than the target response, AND, the level that you set the Threshold has no effect on target response. So, if that is true, why would page 36 of the X-70 manual state:
"If the Threshold is set to a negative value, small target signals will not produce a signal big enough to go above the Threshold of audibility"? Maybe another conspiracy???

HH Randy

 

[Mike Hillis]

...function when you are in Prospecting mode? And while in the the Coin & Treasure mode it only functions as an audio response indicator for rejected targets?

Just guessing at the moment, but after yours and Bills posts, I'll bet thats how it operates.

HH

 

[steve herschbach]

Hi Guys,

From what I have seen so far the threshold is a true threshold in the Prospecting Mode.

In the Coin Mode, a positive target response seems to simply come in on top of the threshold sound. I have not yet been able to get the threshold to vary on the positive side while in coin mode. BUT rejected targets do cause the threshold to null, so it does repond on the negative side.

Curious indeed, but not bad. It is nice hearing rejected targets in the form of a null in the threshold. But I think what many of us hoped for was an increase in threshold on targets too weak to actually cause the regular target response to kick in. Kind of a "mixed mode" response.

I've not had time, or ground unfrozen enough to try it, but we need to hunt hard in the Porspecting Mode, find faint items, and then switch to the Coin Mode and check the targets again. Question of the day is can you really hit a coin deeper in the threshold based Prospecting Mode deeper than in Coin Mode?

Steve Herschbach
Steve's Mining Journal

 

[Digger]

remains arbitrary! I know that some say the MXT will detect coins deeper in the Relic Mode than in C/J. But, personally, I have not found that in my neck of the woods. To me it is just a two-tone C/J mode with different target indicators. And, living in Iowa, I (unfortunately) don't find a need to use Prospecting mode on the MXT. HH Randy

 

[steve herschbach]

Hi Randy,

I'm a relic mode guy myself on the MXT. The secret is the variations in the background all-metal tone that indicates a target beyond the range that kicks in a normal response on the MXT. When nugget detecting, if you get that threshold variation in Relic Mode, you kick some dirt off, and lo and behold a real target signal appears.

Which is why I am curious about the prospect Mode versus coin mode on the X-Terra. Some machines have quite a bit of difference in the depth of detection between all-metal and the disc modes. Some are so close it hardly matters. A CZ will hit a target about as deep in disc as in all-metal. It appears to me so far that on most targets the X-Terra 70 hits so well in coin mode that any gains in all-metal will be minimal indeed. But still enough to interest the nugget hunting or beach hunting crowd, perhaps, especially on tiny items.

Steve Herschbach
Steve's Mining Journal