JPS54140810A - Agc system - Google Patents

Agc system

Info

Publication number
JPS54140810A
JPS54140810A JP4948178A JP4948178A JPS54140810A JP S54140810 A JPS54140810 A JP S54140810A JP 4948178 A JP4948178 A JP 4948178A JP 4948178 A JP4948178 A JP 4948178A JP S54140810 A JPS54140810 A JP S54140810A
Authority
JP
Japan
Prior art keywords
temperature
variation
equivalent
equalizer
error
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
JP4948178A
Other languages
Japanese (ja)
Inventor
Akimasa Yamazaki
Hitoshi Yoshizawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4948178A priority Critical patent/JPS54140810A/en
Publication of JPS54140810A publication Critical patent/JPS54140810A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising

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 reduce the cost of a transmission line by compressing variation in temperature by using a distance equalizer and by making an error, against variation in line length, equivalent to the variation in temperature at one point by detecting the temperature of a cable. CONSTITUTION:A signal having passed through input terminal 1 and telegraph unit 2 is sent out to a line and then supplied to variable equalizer 9 of repeater 8, where a loss due to the line length is made euqivalent to make the variation in temperature equivalent coarsely. A signal including an error caused by making the temperature variation equivalent by using a distance equalizer is inputted to variable equalizer 9 of receiver 11, where variation due to the cable length is made equivalent to make the temperature variation equivalent coarsely in the same way as repeater 8 and also to make the error equivalent finally by using error equalizer 10. The error equalizer, on the other hand, is driven corresponding to the cable temperature detected by cable temperature detector 12.
JP4948178A 1978-04-25 1978-04-25 Agc system Pending JPS54140810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4948178A JPS54140810A (en) 1978-04-25 1978-04-25 Agc system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4948178A JPS54140810A (en) 1978-04-25 1978-04-25 Agc system

Publications (1)

Publication Number Publication Date
JPS54140810A true JPS54140810A (en) 1979-11-01

Family

ID=12832342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4948178A Pending JPS54140810A (en) 1978-04-25 1978-04-25 Agc system

Country Status (1)

Country Link
JP (1) JPS54140810A (en)

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