JPS5784367A - Echo detector employing simulated noise series - Google Patents

Echo detector employing simulated noise series

Info

Publication number
JPS5784367A
JPS5784367A JP16029380A JP16029380A JPS5784367A JP S5784367 A JPS5784367 A JP S5784367A JP 16029380 A JP16029380 A JP 16029380A JP 16029380 A JP16029380 A JP 16029380A JP S5784367 A JPS5784367 A JP S5784367A
Authority
JP
Japan
Prior art keywords
signal
output
repeater
point
sent out
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
JP16029380A
Other languages
Japanese (ja)
Inventor
Nobuyuki Tokura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP16029380A priority Critical patent/JPS5784367A/en
Publication of JPS5784367A publication Critical patent/JPS5784367A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Locating Faults (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

PURPOSE:To conduct measurement of a distance between a repeating point and a reflecting point, by transmitting simulated noise series and the delay signal from a transmission terminal by time-division multiplex, changing delay amount, and correlating a time-division multiplex signal with a reflected wave in a repeater. CONSTITUTION:In order to measure a reflection from a fault 28 in a terminal station 11, a signal generator 11 is connected with a transmission passage signal input terminal 18, and a measurement signal is sent out to a signal transmitting cable 31 of a transmission passage 21. The signal is amplified in a repeater 4 and sent out through a coupler 22. A reflected signal from the fault 28 is extracted by the coupler 22 of a reciprocal receiving unit 21 in the repeater 4 and multiplied by an output of a repeating amplifier 19 by a multiplier 23, and by conducting time integration of integral-number-times period of simulated noise series by an integrator 24, the output is put into a corelative operation.A correlative output is sent out to an output terminal 25 through a fault information transmitting cable 5 and indicated on an indicator 26. It is possible, by using said reflection characteristic, to detect the faulty point 28 which is beyond the repeating point.
JP16029380A 1980-11-14 1980-11-14 Echo detector employing simulated noise series Pending JPS5784367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16029380A JPS5784367A (en) 1980-11-14 1980-11-14 Echo detector employing simulated noise series

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16029380A JPS5784367A (en) 1980-11-14 1980-11-14 Echo detector employing simulated noise series

Publications (1)

Publication Number Publication Date
JPS5784367A true JPS5784367A (en) 1982-05-26

Family

ID=15711838

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16029380A Pending JPS5784367A (en) 1980-11-14 1980-11-14 Echo detector employing simulated noise series

Country Status (1)

Country Link
JP (1) JPS5784367A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5481195A (en) * 1992-06-19 1996-01-02 Siemens Aktiengesellschaft Method for finding a fault on an electrical transmission line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5481195A (en) * 1992-06-19 1996-01-02 Siemens Aktiengesellschaft Method for finding a fault on an electrical transmission line

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