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BPC (time signal) : ウィキペディア英語版 | BPC (time signal) BPC is the callsign of a time signal broadcasting from the BPC Shangqiu Low-Frequency Time-Code Radio Station, cooperatively constructed by the National Time Service Center of the Chinese Academy of Sciences and Xi’an Gaohua Technology Co., Ltd.(), since April 25, 2002. BPC transmits a time signal on 68.5 kHz, which can be used for synchronizing radio controlled clocks. As opposed to other time signal transmitters, the signal format is not published openly; a special license is required. The transmission site is situated near Shangqiu, Henan Province at .〔http://www.time.ac.cn/serve/e_c.htm〕 BPC broadcasts at 90 kW for 21 hours per day, with a 3 hour break from 05:00–08:00 (China Standard Time) daily〔 (21:00–24:00 UTC). BPC includes both conventional amplitude modulated time code and additional spread-spectrum time code, about which little is known. ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「BPC (time signal)」の詳細全文を読む
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