Delta Pitch (dP) mode

[Mike Hillis]

The R6 enhancement includes the new delta Pitch (dp) discrimination mode. You might remember from past posts that I often would get great audio without any visual id.

Well, I had figured out what is happening and it is easy for you to see the same thing. Whats happening is that since the dp mode isn't doing any sampling (no internal threshold for the signal response to pass through) it responds to targets beyond the ability of the meter to identify. It also responds audibly to targets that are beyond the audio limits of the other modes. Another words, this is the deep search mode for the discrimination side.

I discovered this while investigating very weak signal responses from deep targets while hunting in 3 tone mode. These targets would give very weak audio and intermediate visual responses. I discovered that when switching over to the dP mode, the audio was significantly stronger while the visual in most cases did not display. Switching back to 3 mode, the audio again was very weak. Turning up the sensitivity 10+ numbers would raise the audio to the dP audio level and of course, restored a visual display.

You can easily verify this on your own. Find a fairly deep target in one of the other processing modes. Then turn your sensitivity down until you get a very weak, repeatable audio signal and an intermediate visual response. Now switch audio modes to dp. You'll see the visual display may give a very intermediate to no response at all, but the audio id will be much stronger than what you heard in the other mode. Then switch back to the starting mode and see how far you need to raise the sensitivity to match the dP mode's audio strength. I think you will be surprised.

You need discrimination at the extreme edge of depth, think dP.

HH

Mike

 

[earthmansurfer]

Another post for my archive! I'm glad you brought this up Mike, because last week when I was hunting I hit a few spots where I just got an audio signal in 3 or 3b mode. This time around I don't think I put in into Db mode. I am new with an id machine and need to remember to dig those audio only targets. I was thinking it was something deep but it was "crackely" and I took the lazy approach.

I am hunting a playground next to a 500 year old castle and almost only pull 1920 era coins. I know something old must be in the area and what I dig is only 3 to 5 inches deep as it is. I'm going to hit that playground again and focus on those deep sounds (after a light rain preferably, they seem to appear then).

I first started hunting with my T2 in Db mode but once I found it was continous I switched to sampled due to the trash and target quantity... but come to think of it, it worked well! I need to play with it again.

Any more comments on Db mode or the other modes in relation to hunting conditions? Is it so bad to use Db mode around allot of targets? I did read those comments already posted.

Sincerely and thanks,
Earthmansurfer

 

[jbow]

Seem's so to me that the number id locks in much better in the other modes. I am having a hard time in general with the vid, it just don't seem to lock in on consistant numbers like my Soverign GT, the GT is much more reliable with the TID using a Digimeter. It could be something I am doing or setting wrong though...

J

 

[earthmansurfer]

J,

Come to think of it I think I noticed it in 3b mode a few times but I will need to verify it next time out. Hopefully will get out this weekend and let you know. Gonna be looking for deep uns

EMS