JPS5797461A - Transmission system for return signal of b type fault locator - Google Patents

Transmission system for return signal of b type fault locator

Info

Publication number
JPS5797461A
JPS5797461A JP17437380A JP17437380A JPS5797461A JP S5797461 A JPS5797461 A JP S5797461A JP 17437380 A JP17437380 A JP 17437380A JP 17437380 A JP17437380 A JP 17437380A JP S5797461 A JPS5797461 A JP S5797461A
Authority
JP
Japan
Prior art keywords
surge
point
constitution
sampling
reception side
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
JP17437380A
Other languages
Japanese (ja)
Other versions
JPH0156386B2 (en
Inventor
Akihiro Matsushita
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 JP17437380A priority Critical patent/JPS5797461A/en
Publication of JPS5797461A publication Critical patent/JPS5797461A/en
Publication of JPH0156386B2 publication Critical patent/JPH0156386B2/ja
Granted 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

Abstract

PURPOSE:To transmit a detected point of surge easily and precisely through a low-speed digital circuit, by removing sampling distortion in sampling the detection point of surge generated when an accident of a transmission line occurs. CONSTITUTION:Before the generation of surge, a frame generator FG sends a unique pattern to be synchronized with a reception side in terms of phase. Once a surge (a) is detected by a surge detector, a detection output (b) is applied to a terminal, and consequently a counter COT starts counting pulses from a reference oscillator OSC and stops the counting operation by a next sampling pulse from a clock generator CG (counting time ts). The COT to be output (b), the frame generator FG interrupts the transmission of a synchronizing signal, and generates and transmits a code sequence with frame constitution. The reception side, on the other hand, discriminates surge information once detecting a start bit by a code checker C, and then extracts data; and an arithmetic circuit CA computes time relation with the surge signal of its office inputted through a delay circuit T to spot an accident point.
JP17437380A 1980-12-10 1980-12-10 Transmission system for return signal of b type fault locator Granted JPS5797461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17437380A JPS5797461A (en) 1980-12-10 1980-12-10 Transmission system for return signal of b type fault locator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17437380A JPS5797461A (en) 1980-12-10 1980-12-10 Transmission system for return signal of b type fault locator

Publications (2)

Publication Number Publication Date
JPS5797461A true JPS5797461A (en) 1982-06-17
JPH0156386B2 JPH0156386B2 (en) 1989-11-29

Family

ID=15977474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17437380A Granted JPS5797461A (en) 1980-12-10 1980-12-10 Transmission system for return signal of b type fault locator

Country Status (1)

Country Link
JP (1) JPS5797461A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62132180A (en) * 1985-12-04 1987-06-15 Fujitsu Denso Ltd Return signal transmission system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US346268A (en) * 1886-07-27 Holdback for vehicles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US346268A (en) * 1886-07-27 Holdback for vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62132180A (en) * 1985-12-04 1987-06-15 Fujitsu Denso Ltd Return signal transmission system

Also Published As

Publication number Publication date
JPH0156386B2 (en) 1989-11-29

Similar Documents

Publication Publication Date Title
JPS5797461A (en) Transmission system for return signal of b type fault locator
JPS57111196A (en) Signal error detector
JPS5680944A (en) Synchronism detecting circuit of digital receiver
JPS6021503B2 (en) AIS signal receiving circuit
RU1807426C (en) Method of determination of distance to point of fault in power line and device for its implementation
SU1626403A1 (en) Device for detecting validity loss during digital data transmission via communication lines
SU664150A1 (en) Slave digital alarm clock
JPS5614743A (en) Signal transmitter
JPS5456318A (en) Phase matching detection method of facsimile
SU1106008A1 (en) Pulse train duration selector
SU548938A2 (en) Synchronous binary signal transmission system over cable lines
SU1533012A1 (en) Device for transmission of signals of initial synchronization
SU1042184A1 (en) Stand-by scaling device
SU993456A1 (en) Pulse synchronization device
SU1283980A1 (en) Serial code-to-parallel code converter
SU578669A1 (en) Device for cyclic synchronization in digital data transmission systems
SU906014A1 (en) Device for phase starting of receiver
SU1256092A1 (en) Device for checking synchronism of reproduced signals
SU1283976A1 (en) Number-to-pulse repetition period converter
SU1492480A1 (en) Device for communication channel monitoring
SU585623A1 (en) Telegraph apparatus receiver with monitor
SU815949A1 (en) Device for measuring correctability of binary signal receiver
SU855981A1 (en) Device for sunchronization and normalization of pulse train
SU843283A2 (en) Start-stop receiving device
SU1241506A1 (en) Synchronous device