häiriömittauksiin

Häiriömittaukset refer to electromagnetic interference (EMI) measurements. These measurements are crucial in evaluating the electromagnetic compatibility (EMC) of electronic devices and systems. EMC ensures that a device operates correctly in its electromagnetic environment without causing unacceptable interference to other devices. Häiriömittaukset are performed to ensure that a product complies with regulatory standards and does not emit excessive electromagnetic noise, nor is it unduly susceptible to external interference.

There are two primary types of häiriömittaukset: emissions measurements and susceptibility measurements. Emissions measurements assess the electromagnetic energy radiated or conducted by a device. Radiated emissions are measured in an anechoic or semi-anechoic chamber using antennas, while conducted emissions are measured using LISN (Line Impedance Stabilization Network) couplers on power and signal lines. Susceptibility measurements, on the other hand, evaluate a device's ability to withstand electromagnetic disturbances from external sources. Common susceptibility tests include radiated immunity, conducted immunity, electrostatic discharge (ESD), and electrical fast transient (EFT) testing.

The process typically involves placing the device under test (DUT) in a controlled environment, such as an EMC test chamber. Specialized equipment, including spectrum analyzers, receivers, signal generators, and amplifiers, is used to conduct the tests. Calibration of the test equipment is vital for accurate and repeatable results. Häiriömittaukset are essential throughout the product development lifecycle, from initial design to final certification, to guarantee that electronic products function reliably and safely in today's increasingly electromagnetically complex world.