A system is disclosed that protects private data of users while permitting the monitoring or tracking of electronic devices that are shared for both business and private purposes. In this apparatus, a separating part separates symbols received from a modulating part into symbols to be assigned to a first subcarriers group and into symbols to be assigned to a second subcarriers group. Through incorporation of measurements of values, such as an area under a pulse waveform curve, that are time-domain functions of a change in amplitude of the pulse waveform over a duration of the waveform, embodiments of the present invention represent a significant improvement upon previously described methods of measuring pulsus paradoxus. The measuring apparatus may also measure lengthwise tilt of the length of the lane surface in selectable increments. This avoids cumbersome bit-oriented logic, while also avoiding a very large LUT that would otherwise be required to represent the same codebook. The anisotropic conductive film is laminated over the substrate to cover the terminal pads.