JPS5549055A - Synchronization system - Google Patents

Synchronization system

Info

Publication number
JPS5549055A
JPS5549055A JP12152278A JP12152278A JPS5549055A JP S5549055 A JPS5549055 A JP S5549055A JP 12152278 A JP12152278 A JP 12152278A JP 12152278 A JP12152278 A JP 12152278A JP S5549055 A JPS5549055 A JP S5549055A
Authority
JP
Japan
Prior art keywords
signal
output
synchronizing
reception
timing 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
JP12152278A
Other languages
Japanese (ja)
Inventor
Takeo Kusama
Hisashi Kiyonaga
Junji Iwatake
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12152278A priority Critical patent/JPS5549055A/en
Publication of JPS5549055A publication Critical patent/JPS5549055A/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
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal

Landscapes

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

Abstract

PURPOSE:To simplify synchronization between a reception timing signal and received data by sending synchronizing codes of a transmission timing signal and then by synchronizing the reception timing signal by detecting rise change points of synchronizing codes at a reception side. CONSTITUTION:On reception of transmission request signal 1 from a data terminal equipment, etc., an carrier output from modulator 2 is sent out to transmission line 3. Then, delay switching circuit 4 starts operating and after a certain time for data link establishment between modems passes, gate signal 5 appears at its output. Consequently, synchronizing signal 7 is gated from transmission timing generating circuit 6 so as to obtain gate output 8. By output 8, transmitted data 13 is inputted as transmitted signal S to sample holding circuit 9 and sampled and held as output 9' by sampling pulse 10; and it is modulated by modulator 2 and sent out to transmission line 3. Consequently, the reception timing signal can be synchronized with received data.
JP12152278A 1978-10-04 1978-10-04 Synchronization system Pending JPS5549055A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12152278A JPS5549055A (en) 1978-10-04 1978-10-04 Synchronization system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12152278A JPS5549055A (en) 1978-10-04 1978-10-04 Synchronization system

Publications (1)

Publication Number Publication Date
JPS5549055A true JPS5549055A (en) 1980-04-08

Family

ID=14813299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12152278A Pending JPS5549055A (en) 1978-10-04 1978-10-04 Synchronization system

Country Status (1)

Country Link
JP (1) JPS5549055A (en)

Similar Documents

Publication Publication Date Title
DE69329054D1 (en) TELECOMMUNICATION DEVICE WITH IMPROVED TDD (TELECOMMUNICATION DEVICE FOR HEAVY-DUTY) PROTOCOL
JPS5549055A (en) Synchronization system
JPS5765935A (en) Synchronization establishing system for spectrum diffusing communication
JPS5710543A (en) Ss-tdma synchronizing device
JPS5491004A (en) Data transmission circuit
JPS5621453A (en) Receiving margin confirming system
ES8507750A1 (en) Activation of a transmission link by code sending.
JPS5521690A (en) Timing pick up unit
JPS5526741A (en) Secret talk unit
JPS54162905A (en) Radiotelephony equipment
SU405181A1 (en) DEVICE FOR TRANSMISSION - PRINCIPLE OF QUASITROIC
GB964170A (en) A data transmission arrangement utilising frequency shift or phase shift carrier signalling
JPS5654144A (en) Branch device for data communication
JPS55115756A (en) Data transmission system
JPS53105905A (en) Signal converting device
SU1099405A2 (en) Device for transmitting and receiving digital information
JPS6473946A (en) Data relay system
JPS6478557A (en) Modem signal transmission method
JPS5539410A (en) Increasing method of transmission efficiency for data communication
JPS5819178B2 (en) Timing control method in burst type transmission method
JPS5480019A (en) Test method for communication circuit
JPS5661856A (en) Transmission control system of circuit having modem interface
DK384688D0 (en) METHOD OF SIGNAL TRANSFER
JPS5466016A (en) Transmission system for sub-scanning skip signal on facsimile
JPS6429035A (en) Two-wire data transmission system