JPS5535552A - Distortion noise suppression unit of comminication line - Google Patents

Distortion noise suppression unit of comminication line

Info

Publication number
JPS5535552A
JPS5535552A JP10882978A JP10882978A JPS5535552A JP S5535552 A JPS5535552 A JP S5535552A JP 10882978 A JP10882978 A JP 10882978A JP 10882978 A JP10882978 A JP 10882978A JP S5535552 A JPS5535552 A JP S5535552A
Authority
JP
Japan
Prior art keywords
noise
repeating installation
distortion
linear
constitution
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
JP10882978A
Other languages
Japanese (ja)
Other versions
JPS5923657B2 (en
Inventor
Toshio Nojima
Toru Ooyama
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 JP53108829A priority Critical patent/JPS5923657B2/en
Publication of JPS5535552A publication Critical patent/JPS5535552A/en
Publication of JPS5923657B2 publication Critical patent/JPS5923657B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)
  • Radio Relay Systems (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To make a proper adjustment possible to suppress an overall line distortion noise by giving a constitution where distortion generated by the non-linear distortion compensating means of a repeating installation or the repeating installation can be varied and controlling it on a basis of the measured value of a measuring means. CONSTITUTION:White noise is transmitted to all transmission band width except a specific narrow band in the transmission band from noise load testing unit transmission part 2. Mutual modulation distortion noise is generated due to this white noise in each repeating installation 3 and drops in the specific narrow band where noise is eliminated. This is detected by noise detector 7 for every repeating installation 3 and is transferred to monitor and control equipment 9. Equipment 9 uses noise detection signales from each repeating installation 3 as input to send control signals for non-linear distrotion compensating circuits belongong to terminal station unit 1 and each repeating installation 3. As a result, non-linear distortion noise is cancelled mutually, and the control is so performed that non-linear distortion noise may be minimum as the whole.
JP53108829A 1978-09-05 1978-09-05 Communication line distortion noise suppression device Expired JPS5923657B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53108829A JPS5923657B2 (en) 1978-09-05 1978-09-05 Communication line distortion noise suppression device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53108829A JPS5923657B2 (en) 1978-09-05 1978-09-05 Communication line distortion noise suppression device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP20423483A Division JPS5994926A (en) 1983-10-31 1983-10-31 Distortion noise suppressor of communication line

Publications (2)

Publication Number Publication Date
JPS5535552A true JPS5535552A (en) 1980-03-12
JPS5923657B2 JPS5923657B2 (en) 1984-06-04

Family

ID=14494592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53108829A Expired JPS5923657B2 (en) 1978-09-05 1978-09-05 Communication line distortion noise suppression device

Country Status (1)

Country Link
JP (1) JPS5923657B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS629660U (en) * 1985-07-02 1987-01-21

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61148366A (en) * 1984-12-21 1986-07-07 Hitachi Ltd Ultrasonic probe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS629660U (en) * 1985-07-02 1987-01-21

Also Published As

Publication number Publication date
JPS5923657B2 (en) 1984-06-04

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