I don't know anything about this besides it turns on and looks neat lol. No further testing was done nor do I know how to test. This TELEQUIPMENT S51B Oscilloscope is a reliable and efficient tool for measuring and displaying oscillations. It is ideal for use in various industries such as business and industrial settings, as well as in the field of test, measurement, and inspection. The analog oscilloscope type ensures accurate readings, and its brand, TELEQUIPMENT, is known for producing high-quality equipment. The model, S51B, is a great choice for those in need of an oscilloscope for their work. Its powerful features allow for comprehensive analysis of oscillations, making it an excellent tool for problem-solving and troubleshooting. This item is listed in the categories of Business Industrial, Test, Measurement Inspection, and Analyzers Data Acquisition, and is sure to meet the needs of those searching for a reliable and efficient oscilloscope.