Discrim nails, or Zero the audio?

[bchampNH]

Hi All,

My usual programs have very little discrimination and instead, I set the unwanted VDIs to have no audio tone. Lately, I've been wondering if this is worse than discrimination from a masking standpoint. For example, I hunt in sites with tons of square nails. If I discrim out these rusty nails(-48 VDI), does it 'free up' some processing power and allow good targets to come through better?

I'm planning on doing some testing, but thought I'd ask the forum first.

Thanks in advance!

Regards,
Brian

 

[Larry (IL)]

I also have most iron set to accept but zero tone just because I prefer it that way but according to what White's has said there shouldn't be much, if any difference in which method you use to discriminate iron or any other unwanted target.

 

[Rob (IL)]

The way the code is written the detector can react faster by having it accept all targets and setting a 0 tone to the ones you don't want to hear, rather than rejecting targets. So this and a shorter recovery delay might help.

 

[nw1886]

I have mine set like this also but do have one for detecting bulldozed sites with a huge mix of metals....almost a total rejection of large iron. Try not to use it but less studying the screen and seem to find more things covering a bit more ground.....jump back to the main "audio reject only" program at every chance possible.

 

[bchampNH]

Thanks very much for the info everyone!

Regards,
Brian

 

[corvair]

I run my programs to have the rejected VDI's use a 5 tone instead of zero. This was based upon Magic's program. I think the main reason Magic set his that way was due to having LOCK TRACK turned on so a manual balance is required periodically. If you have the rejected VDI's set at zero it makes it more difficult to balance since you may assume a spot is clear for the balancing but in reality it has some rejected iron targets(set at zero).

The 5 tone just gives you a "ticking" sound when the rejected targets are passed over. This ticking is not a distraction.

I like what Rob said about using zero tone to improve faster signal processing. I have wondered if that might be the case.The very fact the V3i can set individual tones to a low number or zero was one of the main selling features for me.Love that capability.

 

[Rob (IL)]

Magic uses the 5 tone to keep track of the iron in the area he is hunting. It's not needed for G/B. You check if the ground is clean in pinpoint for the purpose of getting a good clean bit of dirt. Pinpoint is all metal and will sound off even if you have the tones set to zero. Hope you are doing well with your V. Rob

 

[Low-Boy/LCPM]

you can always find clean ground with another program and then reground bal with the program you want to hun in.

 

[Larry (IL)]

You could, but why when all you have to do is squeeze the trigger for All Metal mode. (pinpoint)

 

[corvair]

Magic uses the 5 tone to keep track of the iron in the area he is hunting. It's not needed for G/B. You check if the ground is clean in pinpoint for the purpose of getting a good clean bit of dirt. Pinpoint is all metal and will sound off even if you have the tones set to zero. Hope you are doing well with your V. Rob

My mistake, for some reason I thought the 5 tone setting would impact using pinpoint for manual ground balance. I forgot about the all-metal mode - DUH! Thanks for clearing my old mind.

Question, If discriminate is turned off and you use the 0 audio setting to replace discriminated targets, wouldn't we then have the scenario of "masked" clean ground when manually ground balancing?

 

[ak_1234]

All metal mode (in search audio) is an all metal mode with an SAT filter applied. Pinpoint is the same thing, except there is no SAT. Tone ID will have no effect in either of these. So, if you pull the trigger to be in pinpoint, you can listen to the ground to find where there are no targets. Then balance (and the audio during your balance is also in all metal - no SAT). The only time tone ID will affect audio is during the discriminate audio mode.

 

[Rob (IL)]

I couldn't have said it better myself. Thanks Anne.[attachment 203722 731.png.gif]

 

[ak_1234]

Oops. I need to make a small correction. There is a filter during balancing, so you do need to keep the coil moving to balance. It is not the same as the SAT for the search all metal mode though. That's what I meant.

 

[Larry (IL)]

I would have to assume that the required "bobbing" of the coil during GB is adequate for keeping the coil moving?

 

[ak_1234]

Yes But just sitting it on the ground and leaving it there won't work.