JPS5445517A - Detection system of pilot noise - Google Patents

Detection system of pilot noise

Info

Publication number
JPS5445517A
JPS5445517A JP11124577A JP11124577A JPS5445517A JP S5445517 A JPS5445517 A JP S5445517A JP 11124577 A JP11124577 A JP 11124577A JP 11124577 A JP11124577 A JP 11124577A JP S5445517 A JPS5445517 A JP S5445517A
Authority
JP
Japan
Prior art keywords
circuit
signal
pilot
delivery
control
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
JP11124577A
Other languages
Japanese (ja)
Other versions
JPS5616579B2 (en
Inventor
Isao Nakazawa
Shigeki Sato
Takao Nakano
Hiroyuki Homitsu
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP11124577A priority Critical patent/JPS5445517A/en
Publication of JPS5445517A publication Critical patent/JPS5445517A/en
Publication of JPS5616579B2 publication Critical patent/JPS5616579B2/ja
Granted 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)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To simplify the unit by adjusting a plural number of pilot signals to unified level and by reducing the number of system constituting units, in the broad delivery system having the singal delivery of a plurality of system. CONSTITUTION:In the pilot noise detection system mnitoring the pilot signals S1 and S2 inserted to a plurality of signal systems 11-I and 11-II of the broad band signal delivery system, the selection circuit selecting the signal designated in the outputs from the enphasis circuits 12-I and 12-II is provided. Further, the amplifier 25 amplifying the output of the circuit 25 and the selection control circuit 27 selecting and controlling the level adjuster 26 and the circuit 25, are provided. Further, the selection control signal Sc is fed to the control terminal 28 of the control circuit 27, one delivery signal from the circuit 12-I and 12II is fed to the amplifier 23, the level of th pilot signal of the both system 11-I and 11-II adjusted with the adjuster 26, and the output is inputted to the pilot noise detection circuit 24 based on the control of the control circuit 27.
JP11124577A 1977-09-17 1977-09-17 Detection system of pilot noise Granted JPS5445517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11124577A JPS5445517A (en) 1977-09-17 1977-09-17 Detection system of pilot noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11124577A JPS5445517A (en) 1977-09-17 1977-09-17 Detection system of pilot noise

Publications (2)

Publication Number Publication Date
JPS5445517A true JPS5445517A (en) 1979-04-10
JPS5616579B2 JPS5616579B2 (en) 1981-04-17

Family

ID=14556257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11124577A Granted JPS5445517A (en) 1977-09-17 1977-09-17 Detection system of pilot noise

Country Status (1)

Country Link
JP (1) JPS5445517A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6275696U (en) * 1985-12-03 1987-05-14

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60104370U (en) * 1983-12-22 1985-07-16 日本精工株式会社 Locking device in tilt column

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6275696U (en) * 1985-12-03 1987-05-14

Also Published As

Publication number Publication date
JPS5616579B2 (en) 1981-04-17

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