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We report a SDH/SONET multi-rate SFP module with a gain selectable transimpedance amplifier (TIA) and a dual-loop APC based on top and bottom level hold. With compliance to SDH (STM-1/4/16) and SONET (OC-3/12/48) specifications even without an additional cost requirement, multi-bit rate operation with higher received sensitivity, fully dual-loop APC operation up to 3 Gbit/s and dynamically rate selecting...
Underground power transmission lines of 60 kV and over now in use in Japan are mostly oil-filled (OF) cables. In particular, the use of 140-kV OF cable has been sharply increasing of late. The cable is liable to various kinds of mechanical damage (excluding mechanical fatigue phenomena), some of which are considered to affect adversely its performance. Therefore, by subjecting a 140-kV single-core...
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