How do I find the magnetic sweet spot for the motion tracker?

Mounting your motion tracker (MT) on a suitable location can really improve your measurements. If possible, avoid mounting the MT directly on ferro-magnetic material. For light disturbances, a distance of 20 to 30 cm may already be sufficient to prevent any effect on the orientation output. If direct contact or close proximity with ferro-magnetic material cannot be avoided, choose sites where the material is continuous (in contrast to corners, joints, welded seams, ...). Moving parts should be avoided entirely.

The MT Manager can be very helpful in locating an adequate mounting site for the MT as it can visualize magnetometer readings in real time. Connect the MT and open the calibrated data display. By moving the MT over possible mounting sites, you can scan the local magnetic distortion. Pay particular attention to the norm of the magnetic field vector and try to find a site where the norm is close to 1 and ideally remains constant when moving the MT a few inches about. Avoid mounting the MT close to sharp corners in ferro magnetic material to minimize the gradient of the magnetic field.