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d1g1man said:I am .... the proud new owner of an XL Pro!
d1g1man said:So far I understand it as this, maybe Monte or some of you can help:
1. You can treat it just as you do the GEB/DISC and crank up the SIG BAL, detuning the SIG BAL CC until you can get a solid ground balance with the DISC where ever you want it.. (accept nickel and above). While utilizing the AUTO GB feature.[size=medium]... You can increase the Signal Balance in the TR-Disc. mode, which functions like many models that use the term "Gain" or "Sensitivity" or "Pre-Amp Gain." I tend to set the Signal Balance as high as possible and still be able to maintain stable operation, regardless of the operating mode.
You DO NOT use the Signal Balance control to set the Ground Balance in any mode. In the TR-Discriminate mode, regardless of where you have the Sig. Bal. control set, you can MANUALLY GROUND BALANCE the XL Pro by using the lower-range for Ground Reject of the Disc. control as a coarse GB adjustment.[/size]
OR
2. You CAN NOT treat it as GEB/DISC (all of #1) Setting the AUTO GB to Lock and then detuning the SIG BAL from max to bad ground using the DISC knob to manually ground balance, giving you an all metal motion mode. Don't we already have two of those with GEB/SAT and GEB/NORM?[size=medium]... Maybe you're even getting me confused with your post!
The Auto-Trac function is only applicable when hunting in the GEB-Norm or GEB-Disc. or GEB-SAT modes. The Auto-Trac is simply an auto-tracking circuitry that will establish a functional GB for the mode chose at a given site.
It has no bearing on the function of the TR-Disc. mode.
As I stated earlier, you CAN make a manual GB adjustment in TR-Disc. by using the lower-end of the expanded Discriminate range. This will provide you with a non-motion All Metal search mode.
The Signal Balance control doesn't have anything to do with the actual GB function in any mode, except to help control the pre-amp gain of the received signal. The "Bad Ground" region of the Sig. Bal. control is there to acknowledge that some highly mineralized ground can, at times, cause you to have problems and you can't use a higher Signal Balance setting.
Yes, GEB-SAT and GEB-Norm are your All Metal, ground balanced search modes. But the ability to manually set such an operating mode is there if the operator chooses to use it.[/size]
It makes me think that TR/DISC is a NON-MOTION mode for LOW MIN, then it seems like it says is a NON-MOTION mode for all metal in HEAVY mineralization (Manual pages pages 27-28 )[size=medium]... It's there because sometimes a savvy operator would like to have manual control, and it can be handy for a serious nugget hunter ass well.[/size]
Or perhaps, it's just GEB/DISC on TURBO, freed up from the performance detracting ground minerals?[size=medium]... Nope.[/size]
Would someone please slap some sense into me and tell me what TR/DISC IS and IS Not and what it CAN and CAN NOT do? It just drives me batty that I cannot figure this out! I am not going to venture out to hunt unless I at least understand this mode and can ground balance the thing![size=medium]... TR-Disc. IS a conventional discriminate mode of operation that will correctly reject problem trash, especially iron, in the order of it's conductivity qualities and isn't 'fooled' by some trash (such as bottle caps) like a motion-based GEB-Disc. mode.
TR-Disc. IS handy at times when you're sampling ore specimens, or even hunting in a very iron-littered site .
TR-Disc. IS NOT as easy to use due to the falsing caused by changes in the coil/ground relationship. It IS NOT as easy to use due to the fact that in "bad ground" it will not have the depth of detection (ground handling abilities) of a motion-based Discriminate mode (GEB-Disc.).[/size]
Thanks! Ken
Okay, here we go.d1g1man said:I'm going to approach this as if I am standing in the yard with the detector in hand, reporting my findings and failures.
My confusion has to do with manual ground balance and tr disc, there are a couple things I want to touch on before I proceed.
Signal Balance is used to adjust maximum sensitivity while remaining stability.d1g1man said:"You DO NOT use the Signal Balance control to set the Ground Balance in any mode."
I agree, and I think I understand you that you do not use it to set the ground balance, the DISC is used for that (or auto GB). However it is a factor is it not in acquiring a good/proper ground balance to achieve good depth?
The terminology used for controls by manufacturers can often become a bit confusing. For example, let's look at the term "Signal Balance." It has been very easy for newcomers to consider this term to refer to the act of balancing the audio signal similar to "Ground Balance" where-by we balance the circuitry so that the audio Threshold sound (signal) remains the same from a low height to the ground.d1g1man said:The signal balance is an independent control (not having a second function if mode switch is changed).
It's singular function is to increase/decrease the amount of signal received by the detector from the coil.
Rather than look at it as reducing the control until Ground Balance can be achieved, simply think of it as a stability control, that you reduce until you achieve stability .. regardless of the operating mode you are using. For best depth of detection and target responsiveness, you want to operate with the Signal Balance set as high as possible WITHOUT being unstable.d1g1man said:Assuming that the SIG BAL is set at max, fully clockwise one must gradually decrease this control until ground balance can be obtained (auto or manual).
This makes sense to me as if the mineral content of the ground is low, it allows the circuit to reach deep into the ground without having much signal reflection. If we have a lot of minerals in the ground, the signal just gets thrown right back at the coil, therefore we need to decrease the SIG BAL (GAIN) to match it to the amount of reflected signal from the ground that the detector can handle.
Does this seem correct to you Monte?