Electronics is a vast field of study encompassing systems and technologies that control the flow of electrons and other types of charged carriers in various devices such as valves and semiconductors. The application of electronics is fairly widespread and is often the base for the growth of technology. Almost every new or old invention uses the concepts of electronics. Electronics is one of the primary branches of electrical engineering. To put electrical engineering into practice, a large number of electrical devices and equipments are required to test the workability and durability of complex electrical machines and systems.

Electronic test equipment is usually simple and cheap though there are compound electrical gears that are more difficult to test. Electronic test equipment is often referred to as test gear. These devices generate stimulus signals in order to receive responses from electronic gadgets referred to as Devices under Test (DUTs). By using these devices, the functioning of the DUTs can be proven and faults can be tracked and repaired.

Electronic test equipment can range from a simple light bulb to complex computerized and automated testing systems. There are different types of test equipment available for testing different devices. Basic electronic test equipments are used for simple measurement of the capacity of voltage and current in common circuits. Such test gear includes devices such as voltmeters, ammeters, galvanometers, ohmmeters, multimeters, power supplies, signal and pulse generators and oscilloscopes. These devices are usually digital and check simple prototypes. Certain advanced and less commonly used equipment such as clamp meters, electrometers, EMF meters, RF probes and logic analyzers are used to test the operation of higher and advanced components. Most test equipment used generate signals and hence are called signal-generating devices. Signal generating devices such as frequency synthesizer, function generator, pulse generator and signal injectors are used to generate signals for testing the working of electrical circuits.

Electrical test equipments have extensive use in fields such as aerospace, defense, automobiles and telecommunication. The use of these equipments helps in reducing the need for future quality assurance tests.