Mirrored Falloff Profile

The expectation that a symmetric accessory loses field strength at the same rate in opposite directions from center. Measured along x- and x+, or along y- and y+, the two curves should track each other reading for reading. When they separate, the field is stronger on one side than the other at the same distance. The cause is usually physical: uneven winding, a core that sits off center, or a probe that drifted away from the center line during the sweep. A mismatch is worth chasing before the numbers are trusted, because every radial metric assumes the center is really the center. Field Symmetry puts a number on how well the arms agree. See Multi-Axis Scan and Measurement Origin.