most of the time.
The MXT will track and adjust quite quickly and, if you are fortunate to live and hunt in an area with relatively low mineralization, you will experience very little tracking change or radical change that you will hear.
I live in an area with a lot of mineralization. Not only is the mineralization high (typically a ground phase reading of at least 73, very seldom less, and frequently in the 81-86 range), but it can change a lot in just a few steps at some of the more challenging older parks in town or at locations out in the woods, mountains, or deserts.
When I am working sites with extreme ground, such as those reading 81-85, I can use the 'turn-on' locked GB that's an 85, or I can simply survey the exposed rock and/or dirt in my hunting area in the Prospecting mode and select a high phase reading spot for the area to balance to and then 'Lock' the GB.
Either way I can end up with a somewhat positive Ground Balance. A slightly positive GB will eliminate false signals over holes and depressions, or especially in these environments when you might be sweeping over some highly mineralized rocks that are just barely sub-surface.
The nice thing about the MXT is that it is always monitoring the changes in the ground and if you pause, toggle to 'Ground' and then back to 'Lock', you have updated the GB setting based on the tracking.
I have found that in conditions with extreme mineralization and with very frequent and subtle changes in the ground phase, the very fast Autotrac circuitry can be <EM>too</EM> aggressive. Better performance can be had by locking the GB setting. It only makes sense that the 'Lock' function is there for a purpose so I put it to good use.
<EM><STRONG>Monte</STRONG></EM>
