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| Introduction Originally used for comparative testing of security products, this automated test facility using a large GTEM test cell was developed and used by Cranage engineers to assist in developing PIR movement detectors with immunity exceeding 50V/m. The testing system accurately plots the equipment under test (EUT) immunity threshold (V/m) against frequency for keyed carrier, pulsed and amplitude modulated carrier waves. Field strength measurements are made using a 3-axis E- field probe.
Technical Data Frequency range: 20Hz
to 6GHz Test Set-up The EUT is placed in the GTEM test cell above the ground reference plane in a test fixture manufactured from low permittivity dielectric. This is placed within a uniform E-field below the septum with supply, control, and monitoring cables leading out at the ground reference plane. Ferrite decoupling is applied at the ground reference plane to prevent RF currents affecting external instrumentation. Cable disposition is noted and if necessary a second test fixture used to provide a stable reference. Want to find out more? Cranage
EMC & Safety www.cranage.co.uk |
