Is notch filtering an option on the X70?

[jnw8w8]

I have downloaded the manual for the Xterra 70 and cannot tell if the X70 allows notch filtering. If notch filtering is not something that can be programed in as a pattern is this much to be concerned about?

 

[1859large]

Patterns just takes out parts of the "spectrum" with one button. Pattern 1 is rejects iron etc. Or you can hit a pull tab, say TID16 and you can reject that as per the manual. it will place an X on the bars you have manually selected out. You can eliminate your selection resetting the unit to factory settings.

I have played with that feature at home but have never used it in the field. Where I hunt it is so quiet that I like to hear iron much of the time to remind me somebody has been there before. When iron gets noisy I use pattern 1 to quiet it.

HH

1859

 

[DFXDon]

I don't know how you can miss notch filtering in the manual It is one of the strong points on the Terra series detectors and you can do them on all of the x-Terra's on all the patterns or what ever you want to do then just reset everything back to factory with one push of the button this is one fine machine and you should fall in love with it at once, Good hunting and keep reading that manual until you get your x-Terra then watch the video several times;
Don

 

[Digger]

Although they are not specifically referred to as modes, I like to think of the X-70 as having 5 hunt modes. One is the Prospecting mode, which is a true all metal mode, allowing the user the ability to operate with adjustible iron mask functionality. The other 4 are found in the Coin/Treasure mode...... All Metal, Pattern 1, Pattern 2 and Pattern 3. The C/T All Metal mode allows for the detection of both ferrous and non-ferrous, with zero discrimination. The 3 Patterns are each fully programmable and allow the user to set the 28 notch segments according to the ferrous (or non-ferrous) content of the targets you want to accept or reject. Each of those 28 notch segments can be set to either accept or reject, in any of those 3 Patterns. And each of those Patterns can be set differently. Although the X-70 comes preprogrammed for specific notch segments "turned on or off" in each Pattern, you can tweak each of the 3 Patterns for your hunt preferences. For example, if you were specifically hunting for US coins, you could set Pattern 1 to reject all ferrous targets, Pattern 2 to reject anything with a TID of less than 10, to allow for US nickels, and Pattern 3 to accept 10, 12, and nothces 24 -48. This would "get rid of most modern trash" and still accept most US coins. I say MOST as the 3-cent nickel reads a 6, if I remember correctly.
As someone who hunts in All Metal (99% of the time), and the multi-tone mode, I do have one of my Patterns set to accept all targets. The reason is that when the X-70 is turned off after a hunt, when it is turned back on it will be set at the last Pattern mode you used. Since I like to hunt in all metal and sometimes, when arriving on site, get in a hurry to swing the coil, I don't want to be 15 minutes into a hunt before I realize that I am rejecting certain targets. That is why I set my Pattern 3 up with zero discrimination. If I do happen to forget to move from the initial Pattern to All Metal, I am still hunting in a zero discrimination mode, due to my "default" Pattern 3 being set with all notches accepted. In other words my Pattern 3 is a mirror of the all metal mode, and is the Pattern that loads when I turn on the detector. The other 2 Patterns are set to accept all targets except the common notch segments for trash common to the area I might be hunting. I seldom (if ever) use those Patterns. But if the area is littered with a specific type of "junk", and I am tired of digging those targets, I can simply switch to the Pattern that has it rejected and resume my hunt. JMHO HH Randy

 

[jnw8w8]

I see now. I was looking for some reference to the word "Notch" but now I see that MineLab refers to this feature as Patterns. If I am reading the manual correctly the default pattern 2 for instance would be the equivalent of notch filtering that eliminates three blocks of signal, -8 to -6 and then 14 to 26 and finally 48. How does one determine which signals to eliminate or "notch out". Is this best done experimentally?

 

[BarnacleBill]

Well unless you're doing something very naughty, it looks like your ip address resolves to Rice U. down Tejas way. So we will assume that you are interested in U.S. based ID's. Take a look in the FAQFAQ at the top of the page for Digger's ID chart. That will give you a starting point of where desired targets ID at. Then, while in the field if you run across a consistent trash target at a particular ID it can be notched out. This can be done manually or semi-manually. Semi-manually is very very easy, wave the bad actor in front of the coil and with the ID still on the screen, push the accept/reject button, and the target is notched out. A black bar/segment will now appear at the bottom of the screen showing that segment/ID notched out.

HH
BarnacleBill

 

[jnw8w8]

No worries Bill; I

 

[thedeserttortoise]

No worries Bill; I