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The Pip
The Pip is the nickname given by radio listeners to a shortwave radio station that broadcasts on the frequency 5448 kHz by day, and 3756 kHz during the night.〔(【引用サイトリンク】title=The Pip )〕 It broadcasts short, repeated beeps at a rate of around 50 per minute, for 24 hours per day. The beep signal is occasionally interrupted for voice messages in Russian. The Pip has been active since around 1986, when its distinctive beeping sound was first recorded by listeners.
The station is commonly referred to as "The Pip" among English-speaking radio listeners. In Russia, it is known as (Kaplya) "the drop". While its official name or callsign is not known, some of the voice transmissions begin with the code 8S1Shch (Cyrillic: ),〔 which is generally considered to be the name of the station. However, this code may not be a callsign, but instead serve some other purpose.〔
Radioscanner.ru identifies the owner of this station as a North-Caucasian military district communication center with callsign "Akacia" (ex-72nd communication center, Russian "72 узел связи штаба СКВО")
==Format==
The station's format resembles, in many ways, that of its presumed sister station, The Buzzer. Its signal consists of short beeping sounds that repeat at a rate of approximately 50 beeps per minute. It is transmitted on the frequency 5448 kHz during the day and 3756 kHz at night.〔 The times at which the station switches from the day to the night frequency or vice versa are changed over the course of the year, presumably to match the changing lengths of day and night.〔(【引用サイトリンク】title=Enigma 2000 Control List )〕 Higher frequencies have better propagation characteristics during the day, while lower frequencies do better in darkness.
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「The Pip」の詳細全文を読む
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