Systems and methods for processing sensor data and self-calibration are provided. A manufacturing model is defined. The weightings of the plurality of channels can be done using a slicer variance, a PLL variance or another method. The second display box is inverted and reversed and is located above the first display box to form a rectangularly shaped shipping combination. The frequency difference detector outputs a fractional frequency difference signal based on a frequency difference between the local clock signal and the reference clock signal.