This experience must have included the use of schematic diagrams, a variety of test equipment, and the application of appropriate electronic formulas involved in such duties as testing, troubleshooting, modifying, designing, calibrating, installing, maintaining, repairing, constructing, developing, and instructing on electronic equipment, or similar functions. Some examples of qualifying specialized experience include: Work as a technician, instructor, inspector, or mechanic (civilian or military) that showed progression in theoretical and practical knowledge of electronic theory, and of the characteristics, function, operation, and capabilities of a variety of types of electronic equipment.