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This is another sample of data from the detector. This is from a flattened iron target.
XF YF angle
-27 -28
-22 -13
-13 17 -37
3 45 4
1 65 1
-8 72 -6
-23 60 -21
-40 39 -46
11 -3
13 -5
In this case assume there is a fixed threshold of +10 and the discriminator is set to accept any positive phase angle. The first 2 samples are below the fixed threshold so they are ignored. The next sample is above the threshold but the angle is negative, so the beep remains off and the moving threshold is set to 17. The next sample is above the threshold and the angle is positive so the beep is turned on and the threshold set to 45. The next sample leaves the beep on and sets the threshold to 65. The next sample has a negative angle so the beep is turned off and the threshold is set to 72. All the remaining samples are less than 72 so they are ignored.
The result is a short beep, 2/30ths of a second which sounds cut off compared to the long beep from a conductive target.
If the discrimination angle were set at 10 degrees then all the angles from this sweep would have been rejected and there would have been no beep.
Robert Hoolko
XF YF angle
-27 -28
-22 -13
-13 17 -37
3 45 4
1 65 1
-8 72 -6
-23 60 -21
-40 39 -46
11 -3
13 -5
In this case assume there is a fixed threshold of +10 and the discriminator is set to accept any positive phase angle. The first 2 samples are below the fixed threshold so they are ignored. The next sample is above the threshold but the angle is negative, so the beep remains off and the moving threshold is set to 17. The next sample is above the threshold and the angle is positive so the beep is turned on and the threshold set to 45. The next sample leaves the beep on and sets the threshold to 65. The next sample has a negative angle so the beep is turned off and the threshold is set to 72. All the remaining samples are less than 72 so they are ignored.
The result is a short beep, 2/30ths of a second which sounds cut off compared to the long beep from a conductive target.
If the discrimination angle were set at 10 degrees then all the angles from this sweep would have been rejected and there would have been no beep.
Robert Hoolko