Effet de sol et Track lock Prizm 6

[le moustik]

Ci-joint extrait de la notice en anglais bien sûr de mon prizm 6.

. The Prizm 6T has automatic ground tracking to eliminate false targets due to ground mineralization. After you turn the detector on, 6T will automatically balance to the local ground conditions to ensure proper target identification. The balance procedure is simple and can be done using either of two methods.
If you simply sweep the loop back and forth across the ground, the detector will automatically balance to the ground. Make sure there are no metal targets in the area that you sweep the loop over.
Another way to balance the 6T is to bob or pump the loop from surface to about 12 inches above the ground. After a few pumps of the loop from surface to 12 inches, the 6T will then be ground balanced The 6T will automatically track the ground as the mineraliation changes.
Trac Lock (Ground Tracking Lock) locks the ground rejection level at its current setting, indicated on the right side of the display with a padlock icon. Unusually inconsistent grounds (spotty bits of significant mineral among lower or higher mineral base) can cause difficulties for the automatic system. The ‘average ground” setting chosen by the automatic system may not be ideal for eliminating ground noise and providing reasonable stability (few enough signals to recognize metal targets). Allowing the 6T to track to a troublesome spot of mineral (sweeping or pumping over it until it no longer responds) then locking the Trac feature at that level, allows greater overall performance in some areas. Another option for difficult ground areas is searching in the All Metal mode. Automatic Ground Tracking provides optimum performance when the changes in the ground mineralization are progressive. Trac Locking tends to improve performance when searching highly spotty mineral changes or anytime an average ground setting doesn’t provide good results. When Trac Locked, 6T continues to calculate an ideal “average ground” rejection level. Upon Unlocking Trac, 6T instantly chooses that level.
Qui pourrait m'expliquer comment fonctionne exactement l'effet de sol!
J'ai me semble-t-il a peu près compris mais je voudrais confirmation.
D'autre part cet effet de sol intervient-il en mode tout métaux?
Merci aux pros de m'aider!