JPS6440937U - - Google Patents

Info

Publication number
JPS6440937U
JPS6440937U JP13547587U JP13547587U JPS6440937U JP S6440937 U JPS6440937 U JP S6440937U JP 13547587 U JP13547587 U JP 13547587U JP 13547587 U JP13547587 U JP 13547587U JP S6440937 U JPS6440937 U JP S6440937U
Authority
JP
Japan
Prior art keywords
received signal
detection circuit
length
receiver
abnormality
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13547587U
Other languages
English (en)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP13547587U priority Critical patent/JPS6440937U/ja
Publication of JPS6440937U publication Critical patent/JPS6440937U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Description

【図面の簡単な説明】
第１図は本考案による信号端局装置の受信器の
一実施例を示すブロツク図、第２図は搬送保護継
電システムの一例を示すブロツク図、第３図は従
来の信号端局装置の受信器の一例を示すブロツク
図である。 ２……受信回路、３……受信信号断検出回路、
４……周波数ずれ検出回路、５……安定化回路。

Claims (1)

    【実用新案登録請求の範囲】
  1. 搬送保護継電装置に用いる信号端局装置の受信
    器において、受信信号を入力とする受信回路と、
    前記受信信号の半サイクル長または一サイクル長
    を測定し規定長以外のときには異常とする周波数
    ずれ検出回路と、前記受信信号のレベルを測定し
    規定レベル以下のときには異常とする受信信号断
    検出回路とにより構成し、前記周波数ずれ検出回
    路と前記受信信号断検出回路のいずれかが異常検
    出時は前記受信回路の出力を安全側にロツクする
    ようにしたことを特徴とする信号端局装置の受信
    器。
JP13547587U 1987-09-07 1987-09-07 Pending JPS6440937U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13547587U JPS6440937U (ja) 1987-09-07 1987-09-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13547587U JPS6440937U (ja) 1987-09-07 1987-09-07

Publications (1)

Publication Number Publication Date
JPS6440937U true JPS6440937U (ja) 1989-03-10

Family

ID=31395133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13547587U Pending JPS6440937U (ja) 1987-09-07 1987-09-07

Country Status (1)

Country Link
JP (1) JPS6440937U (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0466289U (ja) * 1990-10-19 1992-06-10
JPH06307172A (ja) * 1993-04-24 1994-11-01 Tokyu Constr Co Ltd 分解・組立自在な工事用シャッター

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0466289U (ja) * 1990-10-19 1992-06-10
JPH06307172A (ja) * 1993-04-24 1994-11-01 Tokyu Constr Co Ltd 分解・組立自在な工事用シャッター

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