JPS5588441A - Searching system for faulty position of transmission line - Google Patents

Searching system for faulty position of transmission line

Info

Publication number
JPS5588441A
JPS5588441A JP16407578A JP16407578A JPS5588441A JP S5588441 A JPS5588441 A JP S5588441A JP 16407578 A JP16407578 A JP 16407578A JP 16407578 A JP16407578 A JP 16407578A JP S5588441 A JPS5588441 A JP S5588441A
Authority
JP
Japan
Prior art keywords
bipolar
transmission line
polarity
pulse
signal
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
JP16407578A
Other languages
Japanese (ja)
Inventor
Yukihiro Mochida
Tadao Ogawa
Masanori Arai
Hiroo Kitasagami
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16407578A priority Critical patent/JPS5588441A/en
Publication of JPS5588441A publication Critical patent/JPS5588441A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/404—Monitoring; Testing of relay systems with selective localization using different frequencies selected by local filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To omit the oscillator within the manhole and thus to increase the searching accuracy for the faulty position of the transmission line by detecting every coming pulse obtained by inverting the polarity of the bipolar signal with inversion of the output phase and then transmitting the output signal to the end office. CONSTITUTION:Repeater station devices TRS1 and TRS2 of the end office transmit the bipolar signals to the transmission line including repeaters RP-E and RP-W with inversion of the polarity every 1/2 cycle of the low frequency signal of frequency f. While the polarity of the bipolar signal is inverted to obtain the pulse via the common board and filter OSF within man hole MH, and this pulse is detected by bipolar side error pulse detector BEC. And the output phase is inverted through trigger-type flip-flop TFF, and the output signals are transferred to end offices TRS1 and TRS2. As a result, the oscillator can be omitted within MH, thus increasing the searching accuracy for the faulty position.
JP16407578A 1978-12-26 1978-12-26 Searching system for faulty position of transmission line Pending JPS5588441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16407578A JPS5588441A (en) 1978-12-26 1978-12-26 Searching system for faulty position of transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16407578A JPS5588441A (en) 1978-12-26 1978-12-26 Searching system for faulty position of transmission line

Publications (1)

Publication Number Publication Date
JPS5588441A true JPS5588441A (en) 1980-07-04

Family

ID=15786295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16407578A Pending JPS5588441A (en) 1978-12-26 1978-12-26 Searching system for faulty position of transmission line

Country Status (1)

Country Link
JP (1) JPS5588441A (en)

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