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BPM (time service) : ウィキペディア英語版 | BPM (time service) BPM is the call sign of the official short-wave time signal service of the People's Republic of China, operated by the Chinese Academy of Sciences, broadcasting from CAS's National Time Service Center in Pucheng County, Shaanxi at , roughly 70 km northeast of Lintong, along with NTSC's long-wave time signal BPL on 100 kHz. BPM is broadcast at 2.5, 5.0, 10.0, and 15.0 MHz, the same frequencies as WWV and WWVH, following the schedule listed below:〔(【引用サイトリンク】 url = http://www.time.ac.cn/center/222.html )〕 == Transmission format ==
BPM transmits different signals on a half-hour schedule, modulated with 1 kHz audio tones to provide second and minute ticks: BPM is idiosyncratic in that it transmits UT1 time between minutes 25 through to 29 and 55 through to 59, which creates an odd click-beep effect when heard below a stronger time signal station such as WWV.
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「BPM (time service)」の詳細全文を読む
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