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Date Posted: 16:00:03 08/16/02 Fri
Author: Ralph
Subject: Re: High Frequency
In reply to: Reg 's message, "Re: High Frequency" on 13:51:13 08/16/02 Fri

Right you are...... no relative motion, no signal. Applies to both the target and the ground minerals, and whenever the ground matrix has a very consistent mineralization level, there is little if any worry in the discrimination mode. The real workout for the filters (or the SAT you mention) is when the ground becomes inconsistent. Before the advent of variable SAT (vSAT), we had to "compromise" between our fixed SAT speeds and coil sweep speeds to try to keep things quiet with earlier all-metal gold machines.

My intent was to point out that it is not so much the level of ground mineralization present as it is the inconsistencies of that mineralization as the coil sweeps along that causes the most problems in small or deep target masking..... much the same as a hot rock can be viewed as a MAJOR inconsistency in the background :)

Ralph

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