A inkjet printer cartridge is described including at least one print head for printing data on a support, wherein a thin printed circuit is permanently fixed to the printer cartridge and a miniature data processing unit fixed to the printed circuit analyzes a stream of printing commands for controlling the print head to authenticate the data to be printed on the support. The monoblock includes a case having a base and a cover dimensioned and configured to the base. The system also takes advantage of the depth of the shaft to add a heat exchange system that is used to control the temperature within the structure. Specifically, the invention modifies a program control information signal at the cable headend before the modified signal is transmitted to each set top terminal. The electrode structure has a large region of linear force to provide low torque-ripple allowing simple highlow voltage pulsing instead of analog high voltage waveforms. The software proxy process provides filter and protocol functions to facilitate interconnection between heterogenous communication systems.