| Presentation | 2012-05-31 Investigation of the input impedance measurement technique of the telecommunication equipment in an operating state Naomichi NAKAMURA, Norihito HIRASAWA, Yoshiharu AKIYAMA, Nobuo KUWABARA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | As the equipment using inverter technology is increasing for power savings, it has been reported that the disturbance from inverter circuit affects telecommunication equipment such as DSL. To solve these problems, it is necessary to clarify the failure mechanism. One of the methods is to study the inducing mechanism of the noise at telecommunication ports by using equivalent circuits. However, measurement method of input impedance in the operating state has not been established yet. This report describes a new method of deriving an input impedance using a network analyzer, the coupling decoupling network (CDN), a capacitive voltage prove (CVP), and a current probe (CP). The method was evaluated by measuring a common mode impedance of the CDN. Moreover, the method was applied for measuring the input impedance of the VDSL modem ports. The results indicate that the impedance at line port and LAN port exhibit a capacitive load property less than 10 MHz but the impedance of mains port exhibits a resistive property more than 1 MHz. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | input impedance / S-parameter / conducted emission / propagation route |
| Paper # | EMCJ2012-15 |
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| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2012/5/24(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Electromagnetic Compatibility (EMCJ) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Investigation of the input impedance measurement technique of the telecommunication equipment in an operating state |
| Sub Title (in English) | |
| Keyword(1) | input impedance |
| Keyword(2) | S-parameter |
| Keyword(3) | conducted emission |
| Keyword(4) | propagation route |
| 1st Author's Name | Naomichi NAKAMURA |
| 1st Author's Affiliation | NTT Energy and Environment Systems Laboratories() |
| 2nd Author's Name | Norihito HIRASAWA |
| 2nd Author's Affiliation | NTT Energy and Environment Systems Laboratories |
| 3rd Author's Name | Yoshiharu AKIYAMA |
| 3rd Author's Affiliation | NTT Energy and Environment Systems Laboratories |
| 4th Author's Name | Nobuo KUWABARA |
| 4th Author's Affiliation | Kyushu Institute of Technology |
| Date | 2012-05-31 |
| Paper # | EMCJ2012-15 |
| Volume (vol) | vol.112 |
| Number (no) | 73 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |