JPS5448413A - Photo delivery method of analog signal - Google Patents

Photo delivery method of analog signal

Info

Publication number
JPS5448413A
JPS5448413A JP11463077A JP11463077A JPS5448413A JP S5448413 A JPS5448413 A JP S5448413A JP 11463077 A JP11463077 A JP 11463077A JP 11463077 A JP11463077 A JP 11463077A JP S5448413 A JPS5448413 A JP S5448413A
Authority
JP
Japan
Prior art keywords
signal
analog signal
fed
analog
output
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
JP11463077A
Other languages
Japanese (ja)
Inventor
Shigemichi Matsuka
Keiji Saitou
Yutaka Takuma
Hidehiro Kitanosono
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 JP11463077A priority Critical patent/JPS5448413A/en
Publication of JPS5448413A publication Critical patent/JPS5448413A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To simplify the circuit constitution, by calibrating and demodulating the analog signal into a normal value at the reception side, by feeding the reference signal simultaneously with the analog quantity. CONSTITUTION:The output of the analog signal generators 34a to 34c is fed to the optical fibers 37a to 37d of the photo delivery cable 32 via the photo electric converters 36a to 36c and the output of the reference signal gnerator 35 is via the photo electric conversion unit 36d. At the reception end 33, the analog signal is fed to the calibration units 39a to 39c via the photo electric converters 38a to 38d, the refernce signal is fed to the calibration signal generator 40, developing the reciprocal signal of the attenuation of the reference signal, and this output is fed to the calibration unit and it is multiplied with the analog signal. As a result, the amount of attenuation of the analog signal accompanying the timely veriation is corrected and it is reconstituted with the delivery signal accurately at the analog signal receivers 41a to 41c.
JP11463077A 1977-09-26 1977-09-26 Photo delivery method of analog signal Pending JPS5448413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11463077A JPS5448413A (en) 1977-09-26 1977-09-26 Photo delivery method of analog signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11463077A JPS5448413A (en) 1977-09-26 1977-09-26 Photo delivery method of analog signal

Publications (1)

Publication Number Publication Date
JPS5448413A true JPS5448413A (en) 1979-04-17

Family

ID=14642640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11463077A Pending JPS5448413A (en) 1977-09-26 1977-09-26 Photo delivery method of analog signal

Country Status (1)

Country Link
JP (1) JPS5448413A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635278U (en) * 1979-08-27 1981-04-06
JPS5640764A (en) * 1979-09-12 1981-04-17 Kansai Electric Power Co Inc:The Measuring unit of lightning current
JPS60210039A (en) * 1984-04-04 1985-10-22 Hitachi Ltd Optical signal transmitter
JPH0299884A (en) * 1988-10-07 1990-04-11 Mitsubishi Electric Corp Radiation measuring apparatus
US5410363A (en) * 1992-12-08 1995-04-25 Lightwave Communications, Inc. Automatic gain control device for transmitting video signals between two locations by use of a known reference pulse during vertical blanking period so as to control the gain of the video signals at the second location
CN104104443A (en) * 2014-08-04 2014-10-15 山东科汇电力自动化股份有限公司 Method and device for transmitting analog electrical signal through optical fiber

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635278U (en) * 1979-08-27 1981-04-06
JPS5917424Y2 (en) * 1979-08-27 1984-05-21 ヤンマー農機株式会社 Speed sprayer control device
JPS5640764A (en) * 1979-09-12 1981-04-17 Kansai Electric Power Co Inc:The Measuring unit of lightning current
JPS60210039A (en) * 1984-04-04 1985-10-22 Hitachi Ltd Optical signal transmitter
JPH0347020B2 (en) * 1984-04-04 1991-07-18 Hitachi Ltd
JPH0299884A (en) * 1988-10-07 1990-04-11 Mitsubishi Electric Corp Radiation measuring apparatus
JPH079456B2 (en) * 1988-10-07 1995-02-01 三菱電機株式会社 Radiation measuring device
US5410363A (en) * 1992-12-08 1995-04-25 Lightwave Communications, Inc. Automatic gain control device for transmitting video signals between two locations by use of a known reference pulse during vertical blanking period so as to control the gain of the video signals at the second location
CN104104443A (en) * 2014-08-04 2014-10-15 山东科汇电力自动化股份有限公司 Method and device for transmitting analog electrical signal through optical fiber

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