These images illustrate the setup used for radiated emission testing of an electronic device. Radiated emission testing is a crucial step in ensuring that a device complies with regulatory standards regarding electromagnetic interference (EMI). The tests are conducted in a controlled environment, typically an anechoic chamber, to minimize external interference and reflections.
The images show the device under test (DUT) placed on a turntable. The turntable allows the device to be rotated, enabling measurements of emissions from all angles. The first image shows the setup for testing below 1 GHz, while the second image shows the setup for testing above 1 GHz. The difference in setup is due to the different wavelengths of the signals being measured. Above 1 GHz, absorbers are used to minimize reflections and create a more controlled environment.
The goal of radiated emission testing is to measure the strength of electromagnetic radiation emitted by the device. These measurements are then compared to regulatory limits to determine if the device complies with the standards. Compliance with these standards is essential for ensuring that the device does not interfere with other electronic equipment.