Automatic test equipment is any automated device that is used to test printed circuit boards, integrated circuits, or any other related electronic components or modules.

Nowadays, ATE devices are essentially always controlled by computers although in the past, custom-designed controllers or even relay controls were used.

An ATE system can be as simple as a digital multi-meter (DMM) whose operating mode and measurements are controlled and analyzed by a computer, or as complex as a system containing dozens of complex test instruments capable of automatically testing and diagnosing faults in complex electronic systems.

ATE Systems are used to test a wide range of electronic devices and systems, from simple components (resistors, capacitors, and inductors) to integrated circuits (ICs), printed circuit boards (PCBs), and complex, completely-assembled electronic systems.

ATE is widely used in the electronic manufacturing industry to test electronics components and systems after they are fabricated. ATE is also used to test avionics systems on commercial and military aircraft. ATE systems are also used to test the electronic modules in todayÕs automobiles.

Over the past four decades, ATE has grown from specialized systems for electronics test applications to a wide range of applications in all facets of the electronics industry.