Treadmill mode can be used if the person plans to remain on the force plate for a long period of time. If this is the case, then it is important that the person wearing the system calibrates facing the same direction as the jump (or other task) and does not impart any rotations during the measurement. However, if the majority of the environment is clean magnetically, then you should not have any problems calibrating without treadmill mode in a “clean” area then performing the task on the force plate. You may have to re-calibrate due to impact conditions but it is likely that the force plate itself will not affect the data as long as the person does not remain on the force plate for extended amounts of time.