all iron said:
It is my very limited understanding that the delta 4000 has a modulated response to targets ( meaning ) no matter how deep the target, the audio response would be the same.
To correct you, the Delta uses a
saturated audio response. That is, any target that produces sufficient signal response to be processed will be, and at the full audio strength. In short, the audio is
saturated to a full-audio level.
all iron said:
My other detecter< Omega 8000 does not have this and the deeper the traget the fainter the audio respons may be.
Correct, and that is a
modulated audio response wherein the close targets will produce the loudest or strongest audio and, as the targets distances away from the search coil, the signal strength gets weaker and the audio is now
modulated, or diminished, as the target response decreases or weakens in strength.
all iron said:
With that being said, what are the pros and cons to a modulated detector.
It seems like this would be a no brainer when it comes to metal detectors (why wouldn't they all be built with this feature?)
No, I would not like to have all my detectors produce a saturated audio response. There are two reasons why I wouldn't:
1.. For too many decades I have learned and enjoyed a modulated response audio because it can provide more audio definition about the targets size or shape or possible depth. Here I am mainly referring to coin hunting. It lets me hunt a site where I might want to be more attentive to the weaker, and possibly deeper, targets that might be older dated coins.
2.. When I want to hunt in a true Threshold-based All Metal mode I can, but when I work a site in the motion Discriminate mode, I still want to achieve the best depth I possibly can. The modulated audio circuitry usually affords that kind of result.
Why and Why-Not own a model, like the Delta, that uses only a saturated audio? Well, here's the simple good and bad of it:
Good.. I enjoy using my Delta for quick work of typical playground areas, like wood-chip and sand-filled sites, because I want to get all I can and the strong audio response is something I don't mind hearing. Also, when I use the Delta as a loaner the family member or friend, or the property owner who granted permission and is now hunting with me, can easily hear the target response without using headphones. If it was a modulated audio they might have more difficulty hearing weaker signals.
BAD.. When I use it, like any detector I own, I like to get the most performance possible when I am hunting any site where older and/or deeper targets might be. A saturated audio design requires a certain amount of target signal response in order to be 'accepted' and then process to response with the full-strength saturated audio. If the targets is too small or too deep, the signal might not be process and, therefore, I can't get the best depth like I would out of something similar (like an Omega using the d1 or d2 Audio Tone ID option).
Like I always say, there is no such thing as a 'perfect; detector. I like to own a couple (few
) that can compliment each other and better fit certain hunting applications.
Monte
