the tracker IV has the two knobs set up --where the pioneer has a push pad
personally I like the turn knob set up and 3 "mode" toggle switch of the tracker IV -- the tracker IV has a useless "strenght meter' -- on it (pay it no mind) * --basically put - the tracker IV is a sound hunter "tones' machine -- no visual display --it tells you whats in the ground via 3 differant tones =--low , middle and high tone --
the first toggle setting is "all metal" --it finds --"all metals" and only issues 1 tone (since your looking for all metals your not trying to sort out or culling any metals so one tone is all thats needed.)
the second toggle setting is "tone setting" -- it will give you 3 (low -mid-high) differant tones --low tone for iron --mid tone gold / aluminum --high tone for copper and silver --this hits all metal but gives you a possible ideal of what it is before digging
the third toggle setting is the "discrimation" setting -- it can give 2 (mid /high) or the standard 3 differant tones depending on how high or low you set its discrimation level at -- in discrimation mode --the power / sensitivity knob is used to up or lower how much discrimanation one is using -- using discrimanation one can basically get the machine to ignore certain metals -- there is a metal scale that as you go up it certan metals will "fall out of detection" -- there is an order in which it occurs -- the tracker IV when properly adjusted "discrimation" wize can tell most pulltabs from gold items -- if detected pull tabs will be "crackly' where as gold will "ping solidly" -- by using ones ears carefully one can learn the tonal differance fairly easily.
