Proposed Changes to Radiated RF-Field Immunity Test Method to Better Measure Acoustic Noise in Telephones

Masamitsu TOKUDA  Ryoichi OKAYASU  Yoshiharu AKIYAMA  Kusuo TAKAGI  Fujio AMEMIYA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E79-B   No.4   pp.528-533
Publication Date: 1996/04/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Discharge and Electromagnetic Interference)
Category: 
Keyword: 
acoustic noise,  telephone,  radiated RF-field immunity test,  information technology equipment,  CISPR,  

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Summary: 
Based on the test method proposed by Sub-Committee G of the International Special Committee on Radio Interference, most telephone receivers in Japan have insufficient immunity to acoustic noise caused by radio-frequency fields. This is because the modulation depth of the RF signal used is too high to accurately simulate the audio-frequency components of TV video signals. Reducing the modulation depth from 80% to 5% produces a more realistic simulation.