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JPS5710539A - Bidirectional signal transmitter of distribution line carrier system - Google Patents

Bidirectional signal transmitter of distribution line carrier system

Info

Publication number
JPS5710539A
JPS5710539A JP8555480A JP8555480A JPS5710539A JP S5710539 A JPS5710539 A JP S5710539A JP 8555480 A JP8555480 A JP 8555480A JP 8555480 A JP8555480 A JP 8555480A JP S5710539 A JPS5710539 A JP S5710539A
Authority
JP
Japan
Prior art keywords
distribution line
synchronizing signal
code
signal
station
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
JP8555480A
Other languages
Japanese (ja)
Inventor
Susumu Watanabe
Hideyuki Shirokura
Sanshiro Kuroda
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 JP8555480A priority Critical patent/JPS5710539A/en
Publication of JPS5710539A publication Critical patent/JPS5710539A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

Landscapes

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

Abstract

PURPOSE:To enable the transmission of signals surely without causing out of synchronism, by transmitting a code formed with a synchronizing signal which is an integral fraction of the commercial frequency of a distribution line, after being carried on the distribution line between a master station and a plurality of slave stations. CONSTITUTION:A synchronizing signal which is an integral fraction of the commercial frequency of a distribution line tying a master station a plurality of slave stations is formed at each station. For example, a synchronizing signal B formed by one per two cycles from the waveform of Figure A is taken as the base to form a transmission code C, which makes FSK modulation for the carrier frequency to transmit it on a distribution line. Next, a signal D obtained from the demodulation at a receiving station is discriminated at a synchronizing signal E to detect the code F. In this case, the carrier frequency is selected to an intermediate value F0 of harmonics adjacent so that it cannot be interferred with the harmonics of the commercial frequency, and it is made to the FSK modulation to be F0+ or -10Hz. In case of demodulation, a band pass filter in F0+ or - 20Hz is used, and different carrier frequencies are used for incoming and outgoing frequencies. Thus, a stable signal without causing out of synchronism can be transmitted bidirectionally.
JP8555480A 1980-06-23 1980-06-23 Bidirectional signal transmitter of distribution line carrier system Pending JPS5710539A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8555480A JPS5710539A (en) 1980-06-23 1980-06-23 Bidirectional signal transmitter of distribution line carrier system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8555480A JPS5710539A (en) 1980-06-23 1980-06-23 Bidirectional signal transmitter of distribution line carrier system

Publications (1)

Publication Number Publication Date
JPS5710539A true JPS5710539A (en) 1982-01-20

Family

ID=13862040

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8555480A Pending JPS5710539A (en) 1980-06-23 1980-06-23 Bidirectional signal transmitter of distribution line carrier system

Country Status (1)

Country Link
JP (1) JPS5710539A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975724A (en) * 1982-10-22 1984-04-28 Matsushita Electric Ind Co Ltd Commercial power superimposed communication device
JPS6214532A (en) * 1985-07-11 1987-01-23 Nishimu Denshi Kogyo Kk Transmission system for distribution line information
JPH02121236A (en) * 1988-10-28 1990-05-09 Iwatsu Electric Co Ltd Traveling wave deflector
JPH02139830A (en) * 1988-11-18 1990-05-29 Iwatsu Electric Co Ltd Traveling wave deflector
US5038075A (en) * 1988-10-28 1991-08-06 Iwatsu Electric Co., Ltd. Traveling-wave deflection system in a cathode-ray tube with conducting core on helical conductor.
US6184615B1 (en) 1997-10-03 2001-02-06 Iwatsu Electric Co., Ltd. Traveling wave deflection system having helical conductors coiled on insulating cores of a specifiable specific dielectric constant
JP2010236619A (en) * 2009-03-31 2010-10-21 Nissin Kogyo Co Ltd Vehicle disc brake

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5320541A (en) * 1976-08-10 1978-02-24 Mitsubishi Electric Corp Data transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5320541A (en) * 1976-08-10 1978-02-24 Mitsubishi Electric Corp Data transmission system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5975724A (en) * 1982-10-22 1984-04-28 Matsushita Electric Ind Co Ltd Commercial power superimposed communication device
JPS6214532A (en) * 1985-07-11 1987-01-23 Nishimu Denshi Kogyo Kk Transmission system for distribution line information
JPH02121236A (en) * 1988-10-28 1990-05-09 Iwatsu Electric Co Ltd Traveling wave deflector
US5038075A (en) * 1988-10-28 1991-08-06 Iwatsu Electric Co., Ltd. Traveling-wave deflection system in a cathode-ray tube with conducting core on helical conductor.
JPH02139830A (en) * 1988-11-18 1990-05-29 Iwatsu Electric Co Ltd Traveling wave deflector
US6184615B1 (en) 1997-10-03 2001-02-06 Iwatsu Electric Co., Ltd. Traveling wave deflection system having helical conductors coiled on insulating cores of a specifiable specific dielectric constant
JP2010236619A (en) * 2009-03-31 2010-10-21 Nissin Kogyo Co Ltd Vehicle disc brake
US8439171B2 (en) 2009-03-31 2013-05-14 Nissin Kogyo Co., Ltd. Vehicle disk brake

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