Title :
Evaluation of acoustic noise level of telephone receiver measured by radiated RF field immunity test
Author :
Tokuda, Masamitsu ; Okayasu, Ryoichi ; Akiyama, Yoshiham ; Rikiishi, Satoru ; Takagi, Kusuo ; Amemiya, Fujio
Author_Institution :
NTT Telecommun. Networks Labs., Tokyo, Japan
Abstract :
According to the test method proposed by Sub-Committee G of the International Special Committee on Radio Interference, it seems that almost all telephone receivers have insufficient immunity to acoustic noise from radio-frequency fields. This paper shows that the modulation depth of the RF signal in this test is too high to model the audio-frequency components of TV video signals, from which most of this noise comes, and that the modulation depth should be reduced from 80% to 5% for a more realistic simulation
Keywords :
acoustic noise; electromagnetic compatibility; electromagnetic fields; radiofrequency interference; telecommunication equipment testing; telephone interference; telephone sets; telephony; CISPR/SCG; RF signal modulation depth; TV video signals; acoustic noise level; audio-frequency components; radiated RF field immunity test; radio-frequency fields; simulation; telephone receiver; test method; Acoustic measurements; Acoustic noise; Acoustic testing; Electromagnetic interference; Noise measurement; RF signals; Radio frequency; Receivers; TV; Telephony;
Conference_Titel :
Electromagnetic Compatibility, 1995. Symposium Record., 1995 IEEE International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3608-9
DOI :
10.1109/ISEMC.1995.523554
