JPS55166351A - Signal injecting device for distribution line - Google Patents

Signal injecting device for distribution line

Info

Publication number
JPS55166351A
JPS55166351A JP7482079A JP7482079A JPS55166351A JP S55166351 A JPS55166351 A JP S55166351A JP 7482079 A JP7482079 A JP 7482079A JP 7482079 A JP7482079 A JP 7482079A JP S55166351 A JPS55166351 A JP S55166351A
Authority
JP
Japan
Prior art keywords
signal
frequency
case
current
injected
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
JP7482079A
Other languages
Japanese (ja)
Inventor
Hideyuki Shirokura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7482079A priority Critical patent/JPS55166351A/en
Publication of JPS55166351A publication Critical patent/JPS55166351A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/56—Circuits for coupling, blocking, or by-passing of signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5495—Systems for power line communications having measurements and testing channel

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To ensure the steady injection of the FS (Frequency Shift) signal, by setting the high-low resonance frequency of the FS signal coupling circuit to be supplied to the distribution line to the prescribed state and thus securing the coincidence for the injected current in case the signal frequency is switched in order to reduce the transient phenomenon. CONSTITUTION:In case the FS signal is injected to distribution line 4, the coincidence is secured between the resonance frequency decided with constants L2 and C2 of the distribution coupling circuit. At the same time, the resonance frequency decided with constants L1 and C1 is set higher sufficiently than the signal band. The gate frequency of the FS signal is switched by transmission code generator CIN, and gate signals G1 and G2 are applied alternately to thyristors T1 and T2. Thus the FS signal is injected. In this case, frequency fH' to give the current value equal to current IL in the case of frequency fL is referred to as new fH for the signal injection current/signal frequency characteristics curve. And then the coincidence is secured for the injected current in case the frequency is switched.
JP7482079A 1979-06-13 1979-06-13 Signal injecting device for distribution line Pending JPS55166351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7482079A JPS55166351A (en) 1979-06-13 1979-06-13 Signal injecting device for distribution line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7482079A JPS55166351A (en) 1979-06-13 1979-06-13 Signal injecting device for distribution line

Publications (1)

Publication Number Publication Date
JPS55166351A true JPS55166351A (en) 1980-12-25

Family

ID=13558324

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7482079A Pending JPS55166351A (en) 1979-06-13 1979-06-13 Signal injecting device for distribution line

Country Status (1)

Country Link
JP (1) JPS55166351A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184339A (en) * 1981-05-08 1982-11-13 Ohkura Electric Co Ltd Security device for communiction circuit
JPS61198927A (en) * 1985-02-28 1986-09-03 Kyushu Denki Seizo Kk Frequency shift modulation signal injecting device utilizing coarsely coupled transformer
JPH0582031U (en) * 1993-02-25 1993-11-05 九州電機製造株式会社 Loosely coupled transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57184339A (en) * 1981-05-08 1982-11-13 Ohkura Electric Co Ltd Security device for communiction circuit
JPS61198927A (en) * 1985-02-28 1986-09-03 Kyushu Denki Seizo Kk Frequency shift modulation signal injecting device utilizing coarsely coupled transformer
JPH0582031U (en) * 1993-02-25 1993-11-05 九州電機製造株式会社 Loosely coupled transformer

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