What is DUT?
DUT (Device Under Test) is a generic term used in telecommunications and electronics testing to refer to the specific device being evaluated. It can refer to a 5G smartphone, IoT module, base station component, RF front-end module, or any equipment undergoing testing and measurement. Related terms include EUT (Equipment Under Test), SUT (System Under Test), and UUT (Unit Under Test). In the context of 5G NR, the DUT is typically a UE or gNB being tested for conformance to 3GPP specifications.
How Does DUT Work?
During testing, the DUT is connected to test equipment — either through conducted connections (cables) or radiated connections (OTA in an anechoic chamber). The test system generates stimulus signals, applies them to the DUT, and measures the DUT’s response. For conducted testing, RF cables connect to the DUT’s antenna ports. For OTA testing (mandatory at FR2/mmWave), the DUT is placed in a test chamber and communicates wirelessly with measurement antennas. The test system evaluates parameters such as transmit power, receiver sensitivity, EVM, throughput, and beam management performance.
Use Cases
5G NR UE and base station conformance testing, production line end-of-line testing, R&D prototype validation, carrier acceptance testing, and regulatory certification (FCC, CE, PTCRB, GCF).
3GPP / Standards Reference
3GPP TS 38.521 (NR UE conformance testing), 3GPP TS 38.141 (NR BS conformance testing)
Related Terms
OTA | CATR | NFTF | IFF | EIRP
Learn More
This glossary entry is part of the 5GWorldPro Complete 5G Glossary. To go deeper into 5G architecture and technology, explore our 5G Training courses.
