JPS5635557A - Searching system for repeating fault - Google Patents

Searching system for repeating fault

Info

Publication number
JPS5635557A
JPS5635557A JP11150579A JP11150579A JPS5635557A JP S5635557 A JPS5635557 A JP S5635557A JP 11150579 A JP11150579 A JP 11150579A JP 11150579 A JP11150579 A JP 11150579A JP S5635557 A JPS5635557 A JP S5635557A
Authority
JP
Japan
Prior art keywords
code
circuit
exclusive logic
output
differentiating
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.)
Granted
Application number
JP11150579A
Other languages
Japanese (ja)
Other versions
JPS6364930B2 (en
Inventor
Risuke Shimodaira
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11150579A priority Critical patent/JPS5635557A/en
Publication of JPS5635557A publication Critical patent/JPS5635557A/en
Publication of JPS6364930B2 publication Critical patent/JPS6364930B2/ja
Granted 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To search the fault of the repeating transmission system, by transmitting the code controlled by the repeater designating frequency signal to the repeating transmission line via the differentiating circuit and the differentiating mark code inverting circuit and then receiving this code. CONSTITUTION:The code row having a drift of the mark ratio is generated at the code generating circuit 65. And the exclusive logic sum between the code row and the output of the designated frequency generator 75 is obtained through the exclusive logic sum circuit 6 and then supplied to the code differentiating circuit 4. At the circuit 4 the exclusive logic sum is obtained between the code supplied through the exclusive logic circuit 41 and the output of the delaying circuit 42 to be applied to the differential mark code inverting circuit 1. And the output of the circuit 1 is transmitted to the transmission line 40. Then the code is detected through the repeater 6.
JP11150579A 1979-08-30 1979-08-30 Searching system for repeating fault Granted JPS5635557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11150579A JPS5635557A (en) 1979-08-30 1979-08-30 Searching system for repeating fault

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11150579A JPS5635557A (en) 1979-08-30 1979-08-30 Searching system for repeating fault

Publications (2)

Publication Number Publication Date
JPS5635557A true JPS5635557A (en) 1981-04-08
JPS6364930B2 JPS6364930B2 (en) 1988-12-14

Family

ID=14562998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11150579A Granted JPS5635557A (en) 1979-08-30 1979-08-30 Searching system for repeating fault

Country Status (1)

Country Link
JP (1) JPS5635557A (en)

Also Published As

Publication number Publication date
JPS6364930B2 (en) 1988-12-14

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