Electronic apparatus noise measurement method

Details Electronic apparatus noise measurement method Electronic apparatus noise measurement method

2009-10-16

2011-10-04

Natalini, Jeff (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Parameter related to the reproduction or fidelity of a...

C324S625000, C324S638000

Reexamination Certificate

active

08030947

ABSTRACT:
Second and third ports of a network analyzer are individually connected via cables to predetermined connection points on a differential transmission circuit on an object to be measured. A differential cable is connected to the differential transmission circuit. An antenna for receiving an electromagnetic wave radiated from the differential cable is connected to a first port of the network analyzer via a first cable. The network analyzer measures a three-port S parameter of the first, second, and third ports and calculates common-mode and normal-mode components of noise radiated from the differential cable. As a result, the source of noise in an electronic apparatus can be determined, and common-mode noise and normal-mode noise can be separately measured.

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Written Opinion of corresponding International Application No. PCT/JP2008/059031, dated Aug. 12, 2008.

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