Analog signals encoded with quadrature amplitude modulation pass through a coaxial cable at a particular baud rate. The black box parameter is provided for modelling parts of the transformer which cannot be accessed, typically the active parts of the transformer. The sharply biaxially textured substrate can be formed as a tape having a length of 1 km, or more. Pluralities of wire bonds electrically connect the set of semiconductor dies to the leadframe and to the divisional heat sinks respectively.