JPS56109047A - Equalizing system - Google Patents

Equalizing system

Info

Publication number
JPS56109047A
JPS56109047A JP1163580A JP1163580A JPS56109047A JP S56109047 A JPS56109047 A JP S56109047A JP 1163580 A JP1163580 A JP 1163580A JP 1163580 A JP1163580 A JP 1163580A JP S56109047 A JPS56109047 A JP S56109047A
Authority
JP
Japan
Prior art keywords
temperature
time aging
equalizer
detector
preequalizer
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.)
Granted
Application number
JP1163580A
Other languages
Japanese (ja)
Other versions
JPS5837732B2 (en
Inventor
Nobuyuki Tokura
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1163580A priority Critical patent/JPS5837732B2/en
Publication of JPS56109047A publication Critical patent/JPS56109047A/en
Publication of JPS5837732B2 publication Critical patent/JPS5837732B2/en
Expired 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
    • H04B3/10—Control of transmission; Equalising by pilot signal

Landscapes

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

Abstract

PURPOSE:To enable to perform the preequalization for temperature change and time aging change simply, by separately detecting the temperature and time aging variances in transmission line loss, and transmitting the detected information with the level difference of two pilot signals adjacent in the frequencies. CONSTITUTION:When a temperature loss variance of transmission line is present between the time again preequalizer 17 and the temperature preequalizer 21 of the terminal station 13, the temperature detection pilot PLP1 having the frequency negligible in time aging variance is inserted. The temperature detection PL level detector 34 of the terminal station 14 detects the loss temperature variance with the signal P1, and this output controls the temperature post-equalizer 25, temperature preequalizer 22 and temperature information transmitter 35. The transmitter 35 transmits the output of the detector 34 at the level difference of the close frequencies PLP21 and P22, and this signal controls the equalizer 21 and temperature post equalizer 26 via the temperature information receiver 37. Further, the time aging detector PLP2 inserted at the terminal station 14 is detected at the time aging detection PL level detector 38 to control the time aging post equalizer 28, equalizer 17 and time aging information oscillator 39. The oscillator transmits the close frequencies P12, P11 and this level difference controls the time aging equalizers 27, 18.
JP1163580A 1980-02-01 1980-02-01 Equalization method Expired JPS5837732B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1163580A JPS5837732B2 (en) 1980-02-01 1980-02-01 Equalization method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1163580A JPS5837732B2 (en) 1980-02-01 1980-02-01 Equalization method

Publications (2)

Publication Number Publication Date
JPS56109047A true JPS56109047A (en) 1981-08-29
JPS5837732B2 JPS5837732B2 (en) 1983-08-18

Family

ID=11783397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1163580A Expired JPS5837732B2 (en) 1980-02-01 1980-02-01 Equalization method

Country Status (1)

Country Link
JP (1) JPS5837732B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61219229A (en) * 1985-03-26 1986-09-29 Fujitsu Ltd Waveform equalizing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61219229A (en) * 1985-03-26 1986-09-29 Fujitsu Ltd Waveform equalizing system

Also Published As

Publication number Publication date
JPS5837732B2 (en) 1983-08-18

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