Performs the set-up, calibration, testing and troubleshooting of circuits, components, instruments and mechanical assemblies. Determines and may develop test specifications, methods and procedures from blueprints, drawings and diagrams. Tests and troubleshoots assemblies and/or final systems. May complete rework on assemblies and/or systems as a result of testing. Prepares technical reports summarizing findings and recommending solutions to technical problems. May assist in the selection and set-up of specialized test equipment.