A
Anonymous
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How does the Explorer Ground balance? This is what Minelab states as the primary reason the detector is time domain and why the most costly circuits for frequency domain are not needed so hear is an explanation.
The Explorer has what is called a cycle of pulses that are long and short. One long and one short pulse of energy is a cycle. Two pulses is the sequence which repeats over and over. The detector samples the receiver at precise time during a cycle. Ferrite in the soil can be magnetized but will not retain that magnetism as a result of the pulses of energy from the coil. Although there are thousands of pulses per second there is enough time for the ferrite to be magnetized so that between pulses the ferrite magnetic domains reverse directions. This reversal of direction can be measured by the electronics. The ferrites can be clearly identified from metal targets in the soil.
The detector looks the instantaneous ground signal and the historical ground signal. That is it keeps a record so to speak of what the ground minerals look like as we sweep the coil and compares this to what it looks like at the current instantaneous level. The historical and instantaneous data is averaged and the detector predicts what is ahead and also what has been plus what is and can eliminate almost all of the signals from the ground.
This is not automatic ground balance as used by other single frequency or multi frequency detectors. However, if we turn Semi-auto ON then there is some automatic ground compensation added which is one reason why the threshold is more stable with Semi-auto ON.
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<STRONG>The Explorer is not an automatic ground balance detector but instead has ground compensation which is really very different than phase balance null used by most detectors</STRONG>.</span> <STRONG><span style="background-color:#ffff00;">The method used in the Explorer is far superior to others in my opinion </span></STRONG>with compensation instead of manual or auto ground balance. This is one reason for the superior depth and discrimination at depth by the Explorer.
The Explorer has what is called a cycle of pulses that are long and short. One long and one short pulse of energy is a cycle. Two pulses is the sequence which repeats over and over. The detector samples the receiver at precise time during a cycle. Ferrite in the soil can be magnetized but will not retain that magnetism as a result of the pulses of energy from the coil. Although there are thousands of pulses per second there is enough time for the ferrite to be magnetized so that between pulses the ferrite magnetic domains reverse directions. This reversal of direction can be measured by the electronics. The ferrites can be clearly identified from metal targets in the soil.
The detector looks the instantaneous ground signal and the historical ground signal. That is it keeps a record so to speak of what the ground minerals look like as we sweep the coil and compares this to what it looks like at the current instantaneous level. The historical and instantaneous data is averaged and the detector predicts what is ahead and also what has been plus what is and can eliminate almost all of the signals from the ground.
This is not automatic ground balance as used by other single frequency or multi frequency detectors. However, if we turn Semi-auto ON then there is some automatic ground compensation added which is one reason why the threshold is more stable with Semi-auto ON.
<span style="background-color:#ffff00;">
<STRONG>The Explorer is not an automatic ground balance detector but instead has ground compensation which is really very different than phase balance null used by most detectors</STRONG>.</span> <STRONG><span style="background-color:#ffff00;">The method used in the Explorer is far superior to others in my opinion </span></STRONG>with compensation instead of manual or auto ground balance. This is one reason for the superior depth and discrimination at depth by the Explorer.