A coaxial feedthrough connector for connecting an RF signal through a wall in a hazardous environment and particularly to an antenna. During operation, the system receives a posterized image, wherein pixels in the posterized image have color values that belong to a set of posterized color values, which is a subset of a set of possible color values for the deposterized image. The plurality of systems uses the usable frequency band by means of coexistence and frequency-sharing according to a reference model. Duplicate tradelines within each household are removed from consideration in a size of wallet estimate. A second die is attached to the heat sink.