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ANSWER:  You set A.C. Sensitivity levels when designing or installing a program.  When on site detecting you may need to higher or lower A.C. Sensitivity according to your detectors stability, because AC Sensitivity has a major affect on depth and sensitivity in the Audio Discrim modes. Always set as high as site conditions will allow up to number 74, the numbers above 74 may not give any more depth but they can affect stability.  Causing Threshold Tone to pulsate along with some Graph smear.  Only lower to stabilise your detector.  Do not lower to increase any other adjustments, as you will be trading away some depth.

It essential to find the best program possible for general detecting that is capable of finding those elusive gold and hammered coins, I believe if you have a program that is sensitive to these items. That same program will find the rest of the copper brass bronze and lead etc items, when you have found one you are happy with. Install it in one of your custom program slots, then tweak the same program up a little and install it in another custom program slot, for searching very good ground conditions. Then detune the same program a little for poor ground conditions and install it in another custom slot. Then detune the same program even more for bad ground conditions. This method lessons the need for making adjustments on site, you just select a program according to the site conditions, I always start in the general detecting program, then go up or down the programs as the site dictates. This facility works the same in the Eagle Spectrum, XLT, and DFX Detectors

QUESTION:  When do I adjust D.C. Sensitivity?

ANSWER: You set D.C. Sensitivity when designing or installing a program, when using V.C.O. on for Pin-pointing. Or on site if you want to detect in the All Metal Mode or Mixed Mode Audio, whatever program you are using. D C Sensitivity has major affect on depth and sensitivity in the all Metal Mode, and when the loop is stationary or moving very slowly in Mixed Mode Audio.  Always set as high as site conditions will allow in both these modes, the High numbers may not give any more depth but they can affect stability.  Only lower to stabilise your detector. When using the Audio Discrim Mode, set no higher than 45 or it may distort your Pin-Pointing. Do not lower when detecting in All Metal Mode to increase any other adjustments, as you will only be trading away depth and sensitivity. Make sure Threshold Tone is stable, before turning Audio Discrim Off to select All Metal Mode, or turning Mixed Mode Audio on. This facility works the same in te Eagle Spectrum, XLT, and DFX Detectors.