JP4083763B2 - 告知放送用光受信機 - Google Patents
告知放送用光受信機 Download PDFInfo
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- JP4083763B2 JP4083763B2 JP2005267524A JP2005267524A JP4083763B2 JP 4083763 B2 JP4083763 B2 JP 4083763B2 JP 2005267524 A JP2005267524 A JP 2005267524A JP 2005267524 A JP2005267524 A JP 2005267524A JP 4083763 B2 JP4083763 B2 JP 4083763B2
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- optical receiver
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- 230000003287 optical effect Effects 0.000 title claims description 146
- 230000005540 biological transmission Effects 0.000 claims description 89
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000013307 optical fiber Substances 0.000 description 19
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000001131 transforming effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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Description
図1は、本発明の実施形態1に係る告知放送システムの全体構成を示しており、この告知放送システムは、光ファイバケーブルを用いたケーブルテレビのネットワークを利用して構築されたものである。
図3は、本発明の実施形態2に係る告知放送システムの全体構成を示しており、この告知放送システムも、実施形態1の場合と同様に、光ファイバケーブルを用いたケーブルテレビのネットワークを利用して構築されたものである。尚、実施形態1の場合と同じ部分には同じ符号を付して示している。
40 加入者設備
50 第2光受信機(告知放送用光受信機)
51 受光部
52 光電変換部
53 RF信号変圧部
Claims (4)
- 光伝送線路設備を経由して伝送された光伝送信号を告知放送端末に入力して告知放送を行うようにした告知放送システムの加入者設備に設けられ、FM周波数帯の音声情報信号が変換されてなる単一波長領域の光伝送信号を受信してFM周波数帯の音声情報電気信号を出力する告知放送用光受信機であって、
上記光伝送信号をFM周波数帯の音声情報電気信号に変換する受光部と、
上記受光部に連設され、該受光部により受光された光伝送信号を電気エネルギーに変換する光電変換部と、
上記光電変換部により得られた電気エネルギーの供給を受け、上記受光部から出力されたFM周波数帯の音声情報電気信号を上記告知放送端末の適正な入力電圧レベルに変圧して出力するRF信号変圧部とを有することを特徴とする告知放送用光受信機。 - 請求項1に記載の告知放送用光受信機において、
FM周波数帯は、70〜90MHzとされていることを特徴とする告知放送用光受信機。 - 請求項1に記載の告知放送用光受信機において、
受光部により受信される光伝送信号の波長領域が、1310nm帯であることを特徴とする告知放送用光受信機。 - 請求項1に記載の告知放送用光受信機において、
受光部により受信される光伝送信号の波長領域が、1550nm帯であることを特徴とする告知放送用光受信機。
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JP2005267524A JP4083763B2 (ja) | 2005-09-14 | 2005-09-14 | 告知放送用光受信機 |
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JP2005267524A JP4083763B2 (ja) | 2005-09-14 | 2005-09-14 | 告知放送用光受信機 |
Publications (3)
Publication Number | Publication Date |
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JP2007081874A JP2007081874A (ja) | 2007-03-29 |
JP2007081874A5 JP2007081874A5 (ja) | 2007-09-13 |
JP4083763B2 true JP4083763B2 (ja) | 2008-04-30 |
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JP2005267524A Active JP4083763B2 (ja) | 2005-09-14 | 2005-09-14 | 告知放送用光受信機 |
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JP (1) | JP4083763B2 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4452251B2 (ja) * | 2006-04-14 | 2010-04-21 | 三菱電線工業株式会社 | ケーブルテレビ放送システム |
JP5000389B2 (ja) * | 2007-06-13 | 2012-08-15 | Dxアンテナ株式会社 | 光放送伝送システム及び光端末装置 |
US9241199B2 (en) | 2008-02-11 | 2016-01-19 | Mitsubishi Cable Industries, Ltd. | Announcement broadcasting system, announcement broadcasting optical receiver used for the announcement broadcasting system, cable television broadcasting system, and optical receiver used for the cable television broadcasting system |
JP2012065332A (ja) * | 2011-10-31 | 2012-03-29 | Dx Antenna Co Ltd | 光伝送システム及び光端末装置 |
JP6883338B2 (ja) * | 2018-07-13 | 2021-06-09 | シンクレイヤ株式会社 | Ip放送システム |
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- 2005-09-14 JP JP2005267524A patent/JP4083763B2/ja active Active
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