Threshold

[Anonymous]

I have read a few posts relating threshold to depth sesitivity. My understanding was that the threshold just let you know if you were over targets that you had disc'ed out. How can threshold affect depth?

 

[Anonymous]

I don't think it affects depth per se.... but is a manifestation of how "hot" the machine is running and how receptive it is to the faint whispers. If you hunt in an area where mineralization is high... you'll get a lot of falsing, so turning sensitivity down to return to a steady threshold will affect signals from the DEEPEST targets. If the mineralization is negative you'll "loose" the threshold, but what really is happening is you're getting a lot of falsing in the iron range that is being rejected by discrimination setting...... so what you perceive as a loss of threshold is really a constant stream of signals in the rejected range of the discrimination pattern. This also holds true in trashy areas where the loss of threshold is really the nulling effect of the constant foil/pulltab hits that are being rejected.
I never have seen signals in these situations as deep as in "clean, trash-free ground". I believe that the deepest signals are tough for the machine to process fully when it is in the middle of constantly processing a seamless stream of loud shallow trash signals or a constant blare from ground mineralization.
Hope this helps, Mike.