The L3 coaxial system: Quality control requirements

Economic solution of the equalization problem in the L3 system required limitation of the excursions of the transmission characteristics from the design center. To implement this, a pattern of distribution requirements for component elements of the system was worked out utilizing basic quality control techniques. An analysis of the several methods employed is presented with particular emphasis on the intent of the choices which were made and the operating characteristics of the resulting procedures. One of the novel features is the three-cell selection method which insures that the product delivered has the kind of distribution that is wanted even while the process is in trouble distribution-wise.