Absorber Lined Shielding Enclosure (ALSE) Measurements 

Measurement Description

ALSE validation is done in accordance (similar) to CISPR 25 Ed. 3.0 (2008) on the customer's test bench.

In the frequency range from 150 kHz to 30 MHz measurements are done with a monopole antenna compliant to the standard. Field is generated by a test harness that is fed by a generator and terminated with an artificial network.

In the frequency range 30 MHz to 3 GHz we use our optimized procedure: the field is generated by our small conical dipole antenna PCD3100 or a small omni directional dipole POD16, operated close above the metal plane and placed in five positions (instead of the test harness). A detailed description of this procedure was published at "An Accurate Validation Procedure for Component Testing Chambers" at the CE-Mag issue 11/12 2002 and can be found in our download section. Measurements are done with biconical and log. per. and horn antennas in horizontal and vertical polarisation.

The use of our calibrated antennas is included. For measurement with customer's equipment, we need the test bench, a calibrated test receiver or spectrum analyser with GPIB interface and RF-cables.

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