Notch = Discrimination

[Lodge Scent]

I was confused with the Notch versus Discrimination issue. I emailed the XP Factory in France and their answer was that when you Notch you are Discriminating. A Notch of 0-20 is the same as setting the Discrim to 20. It would seem to me then that if you are Notching from 30 to 50 for example, you are employing genuine Discrimination from 30 to 50. You are not just blocking the audio response in that range, you are Discriminating and will suffer the loss of sensitivity on the edges of that range as you would expect to with Discrimination. XP's actual response is below.

 

[Southwind]

will suffer the loss of sensitivity on the edges of that range

True for every detector I've ever owned. Some worse than others, but they all will loose sensitivity on the edge of that last discriminated/notched numbers

 

[beepsilver]

Good info--thanks for sharing the info!

 

[CZconnoisseur]

I figured as much but thank you for the confirmation!

 

[TedyOH]

So I've been lurking here for about a year, figured it was time to register, anyway.....I find this topic very confusing, to me XP's response basically means Discrimination is Audio Notch. When you notch or discriminate 0-20, the detector still sees the target in the 0-20 range, because the horseshoe tells you that, you just don't hear an audio response. So my question is why even call it discrimination? Why can you notch in 2 or 3 different ranges, why not just let you discriminate in 2 or 3 different ranges? Why does everyone say too much discrimination will cost you depth? I run discrimination around 4 and use full tones and no notch / discrimination just to avoid this confusion.

 

[EtracTom-AdirondacksNY]

Some machines Discrimination and Notching will cost you depth on that machine. I think I read that on the Deus it just masks the sounds but doesn't affect the depth. Some other machines are like this too it just depends on what you've got. Maybe Discrimination will affect depth a bit but Notching won't just eliminates the sound? I run Discrimination at 10 from Andy's book info myself. Silencer set at -1 is the key to maximum depth I think on this machine.

 

[HuntinDog]

These guys are French.... English at best is a second language.
I think you maybe miss interpreting what they are saying.
"The notch works LIKE discrimination"
They are not saying it is the same.
I have read that it notches out the audio of the notch zone, not the detection of the targets.

 

[Southwind]

Agreed! I think this letter is being miss interpreted. I think they're are simply trying to say Notch works like discrimination in that it stops you digging junk in the set range. Discrimination is different than notching as pointed out. Notching only stops the user from hearing the numbers noticed out. Discrimination uses filtering and that is where you CAN loose depth. Now that being said, because a target can have a jumpy VDI, and if it is just at the fringe of your notched range, notching can cause you to get a less than clean sound. But I'd call it a masking rather than a loss in depth.

 

[Lodge Scent]

These guys are French.... English at best is a second language.
I think you maybe miss interpreting what they are saying.
"The notch works LIKE discrimination"
They are not saying it is the same.
I have read that it notches out the audio of the notch zone, not the detection of the targets.

You could be right HuntingDog, I have read that too but it seems to me XP's statement..... " For example, if you adjust notch 0 - 20, it will give the same result as Discri at 20.", confirms the Notch and Discrimination are one and the same. If it was just an "audio notch", they couldn't say it would give you the same result as Discrimination.

 

[EtracTom-AdirondacksNY]

By using notch only to do that it was stated in here on this site somewhere that you would get signals on numbers 1 and 2 the very bottom of the discrimination range so it was advised to run some discrimination to cover that and then notch on up if one wanted for the rest.

 

[Hauptmann aD]

If you notch 0 ... 20 it will give you the same results as discrimination at 20 ... this holds true eventually but only, if you have set iron sound to 0. If iron is not set to 0, you will hear it with disc, but not with notch.
Also disc enables some more aggressive filtering, if set higher than 2.0.
Best greetings from Germany
Olaf

 

[Southwind]

if you have set iron sound to 0. If iron is not set to 0, you will hear it with disc, but not with notch.

Fact! So, your idea that they're saying discrimination and notch would give the same results is obviously not correct because it is not true. Seems to me they are giving a simple answer to your simple question. Essentially saying be it discriminating out 0-20 and notching 0-20 would have the same result in that you would eliminate targets that fall in the range of 0-20.