JPS5631248A - Synchronizing system - Google Patents

Synchronizing system

Info

Publication number
JPS5631248A
JPS5631248A JP10689579A JP10689579A JPS5631248A JP S5631248 A JPS5631248 A JP S5631248A JP 10689579 A JP10689579 A JP 10689579A JP 10689579 A JP10689579 A JP 10689579A JP S5631248 A JPS5631248 A JP S5631248A
Authority
JP
Japan
Prior art keywords
current equipment
equipment
oscillator
voltage control
oscillation
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
JP10689579A
Other languages
Japanese (ja)
Inventor
Takao Sakata
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 JP10689579A priority Critical patent/JPS5631248A/en
Publication of JPS5631248A publication Critical patent/JPS5631248A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/0079—Receiver details
    • H04L7/0083—Receiver details taking measures against momentary loss of synchronisation, e.g. inhibiting the synchronisation, using idle words or using redundant clocks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To prevent frame step out at a switching time, by connecting the voltage control oscillator of an auxiliary equipment to the oscillation control loop to phase- synchronize it with the timing pulse from the current equipment when the current equipment is normal. CONSTITUTION:When current equipment 4 is normal, voltage control oscillator 47 is disconnected from the oscillation control loop by switch 45 and is operated as a natural oscillator in current equipment 4, and voltage control oscillator 67 is connected to the oscillation control loop by switching means 65 and is phase-synchronized with the timing pulse from current equipment 4 in auxiliary equipment 6. When the current equipment is faulty, voltage control oscilltor 67 is disconnected from the oscillation control loop by the switching means and is operated as a natural oscillator in the auxiliary equipment, and voltage control oscillator 47 is connected to the oscillation loop by switching means 45 and is phase-synchronized with the timing pulse from the auxiliary equipment in current equipment 4.
JP10689579A 1979-08-22 1979-08-22 Synchronizing system Pending JPS5631248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10689579A JPS5631248A (en) 1979-08-22 1979-08-22 Synchronizing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10689579A JPS5631248A (en) 1979-08-22 1979-08-22 Synchronizing system

Publications (1)

Publication Number Publication Date
JPS5631248A true JPS5631248A (en) 1981-03-30

Family

ID=14445197

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10689579A Pending JPS5631248A (en) 1979-08-22 1979-08-22 Synchronizing system

Country Status (1)

Country Link
JP (1) JPS5631248A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5997245A (en) * 1982-11-26 1984-06-05 Fujitsu Ltd Synchronizing system of dual communication device of time division multiple access system
JPS59156723A (en) * 1983-02-24 1984-09-06 Mitsubishi Monsanto Chem Co Manufacture for slitted web-like product with thermoadhesive property
JPH04277989A (en) * 1991-03-06 1992-10-02 Matsushita Electric Ind Co Ltd Memory controller
JPH0851478A (en) * 1994-08-09 1996-02-20 Fujitsu Ltd Frame clock synchronizing circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5997245A (en) * 1982-11-26 1984-06-05 Fujitsu Ltd Synchronizing system of dual communication device of time division multiple access system
JPH0119781B2 (en) * 1982-11-26 1989-04-13 Fujitsu Ltd
JPS59156723A (en) * 1983-02-24 1984-09-06 Mitsubishi Monsanto Chem Co Manufacture for slitted web-like product with thermoadhesive property
JPH0157651B2 (en) * 1983-02-24 1989-12-06 Mitsubishi Monsanto Chem
JPH04277989A (en) * 1991-03-06 1992-10-02 Matsushita Electric Ind Co Ltd Memory controller
JPH0851478A (en) * 1994-08-09 1996-02-20 Fujitsu Ltd Frame clock synchronizing circuit

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